{"id":8741,"date":"2026-11-11T03:28:39","date_gmt":"2026-11-11T03:28:39","guid":{"rendered":"https:\/\/korea-transmission.com\/?post_type=product&#038;p=8741"},"modified":"2026-11-12T05:36:37","modified_gmt":"2026-11-12T05:36:37","slug":"t-331a-flail-mower-gearbox-ratio-11-94-replacement-for-comer-t-331a-gearbox","status":"publish","type":"product","link":"https:\/\/korea-transmission.com\/ar\/product\/t-331a-flail-mower-gearbox-ratio-11-94-replacement-for-comer-t-331a-gearbox\/","title":{"rendered":"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629 T-331A \u0628\u0646\u0633\u0628\u0629 1:1.94\u060c \u0628\u062f\u064a\u0644 \u0644\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 Comer T-331A"},"content":{"rendered":"<p>The T-331A flail mower gearbox with a 1:1.94 ratio is a professional-grade power transmission unit engineered to serve as a direct replacement for the Comer T-331A gearbox. This heavy duty flail mower gearbox transforms your tractor’s PTO output into the precise rotational speed and torque your flail rotor demands for consistent, clean vegetation cutting. Manufactured with a cast iron GG25 housing, the T-331A delivers up to 280 HP (205.9 kW) of input power and generates a maximum output torque of 1,820 Nm at 540 RPM. Whether you are maintaining open pastures, clearing dense brush along roadsides, or managing vineyard under-row growth, this tractor flail mower gearbox is built for the task. Its three-shaft configuration (X, Y, and Z connections) provides flexible mounting and output arrangements to suit a broad range of flail mower gearbox assembly requirements across different machine brands and cutting widths.<\/p>\n<p>Inside the housing, a set of precision-cut bevel gears meshes within tight tolerances to convert PTO speed into the lower drum RPM and higher torque that the flail rotor needs. Reinforced oil seals and tapered roller bearings guard the internal components against dust, plant debris, and moisture intrusion, which is critical for any agricultural flail mower gearbox operating in harsh field environments. The unit ships without oil to prevent transit damage, and it accepts standard SAE 80W-90 gear oil with a capacity of 6.5 liters. For operators running 3 point flail mower gearbox setups on compact tractors or full-size utility tractors, the T-331A provides the torque headroom and structural rigidity to handle continuous seasonal workloads with minimal downtime. From municipal roadside mowing crews to mixed-crop farms clearing post-harvest residue, this gearbox has proven itself across a wide spectrum of real-world agricultural and land management applications.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8609 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-1-1.94.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 T-331A 1-1.94\" width=\"800\" height=\"800\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-1-1.94.webp 800w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-1-1.94-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 800px, 100vw\" \/><\/p>\n<h2>Technical Parameters<\/h2>\n<table class=\"alignleft\" style=\"width: 100%; height: 684px;\" contenteditable=\"true\" spellcheck=\"false\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0646\u0645\u0648\u0630\u062c<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 T-331A \u0628\u0646\u0633\u0628\u0629 1:1.94<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0627\u0644\u0639\u0644\u0627\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">\u0642\u0627\u062f\u0645<\/td>\n<\/tr>\n<tr style=\"height: 123px;\">\n<td style=\"text-align: center; height: 123px; width: 38.3513%;\"><strong>\u062a\u0641\u0627\u0635\u064a\u0644 \u0627\u0644\u0645\u0646\u062a\u062c<\/strong><\/td>\n<td style=\"height: 123px; width: 61.4098%;\">\n<ul>\n<li class=\"_1f26mj97\">\u062c\u0645\u064a\u0639 \u0639\u0644\u0628 \u0627\u0644\u062a\u0631\u0648\u0633 \u062a\u064f\u0632\u0648\u062f \u0628\u062f\u0648\u0646 \u0632\u064a\u062a.<\/li>\n<li class=\"_1f26mj97\">First oil change after 50-70 operating hours, then after 500-700 operating hours or at least once a year.<\/li>\n<li class=\"_1f26mj97\">\u0627\u062a\u0635\u0644 \u0628\u0646\u0627 \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0627\u0644\u0637\u0627\u0642\u0629 \u0639\u0646\u062f \u0633\u0631\u0639\u0629 \u062f\u0648\u0631\u0627\u0646 \u0645\u062e\u062a\u0644\u0641\u0629.<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr style=\"height: 75px;\">\n<td style=\"text-align: center; height: 75px; width: 38.3513%;\"><strong>\u0646\u0637\u0627\u0642 \u0627\u0644\u062a\u0637\u0628\u064a\u0642<\/strong><\/td>\n<td style=\"height: 75px; width: 61.4098%;\">\n<ul>\n<li class=\"_1f26mj97\">\u062a\u0637\u0628\u064a\u0642\u0627\u062a (\u0632\u0631\u0627\u0639\u064a\u0629) \u0645\u062a\u0646\u0648\u0639\u0629<\/li>\n<li class=\"_1f26mj97\">\u062c\u0632\u0627\u0632\u0627\u062a \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0646\u0633\u0628\u0629\u00a0<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">1:1.94<\/td>\n<\/tr>\n<tr style=\"height: 47px;\">\n<td style=\"text-align: center; height: 47px; width: 38.3513%;\"><strong>\u0648\u0635\u0644\u0629 1 \u0627\u0644\u0642\u0637\u0631 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0628\u0627\u0644\u0628\u0648\u0635\u0629 \u0648\u0627\u0644\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u0645\u0633\u0646\u0646\u0629<\/strong><\/td>\n<td style=\"height: 47px; width: 61.4098%;\">1″3\/4 Z-20<\/td>\n<\/tr>\n<tr style=\"height: 47px;\">\n<td style=\"text-align: center; height: 47px; width: 38.3513%;\"><strong>\u0648\u0635\u0644\u0629 2 \u0627\u0644\u0642\u0637\u0631 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0628\u0627\u0644\u0628\u0648\u0635\u0629 \u0648\u0627\u0644\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u0645\u0633\u0646\u0646\u0629<\/strong><\/td>\n<td style=\"height: 47px; width: 61.4098%;\">1″3\/4 Z-20<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center; width: 38.3513%;\"><strong>\u0648\u0635\u0644\u0629 3\u060c \u0627\u0644\u0642\u0637\u0631 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0628\u0627\u0644\u0628\u0648\u0635\u0629\u060c \u0645\u0639 \u0623\u0633\u0646\u0627\u0646<\/strong><\/td>\n<td style=\"width: 61.4098%;\">1″3\/4 Z-20<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0637\u0627\u0642\u0629 \u062f\u062e\u0644<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">205.9 \u0643\u064a\u0644\u0648\u0648\u0627\u0637<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0633\u0631\u0639\u0629 \u062f\u0648\u0631\u0627\u0646 \u0644\u0644\u0625\u062f\u062e\u0627\u0644<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">540 \u062f\u0648\u0631\u0629 \u0641\u064a \u0627\u0644\u062f\u0642\u064a\u0642\u0629<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0637\u0627\u0642\u0629 \u062e\u0631\u062c<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">205.9 \u0643\u064a\u0644\u0648\u0648\u0627\u0637<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0637\u0627\u0642\u0629 \u062e\u0631\u062c<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">280 \u062d\u0635\u0627\u0646<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0639\u0632\u0645 \u062f\u0648\u0631\u0627\u0646 \u0646\u0627\u062a\u062c<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">1820 \u0646\u064a\u0648\u062a\u0646 \u0645\u062a\u0631<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u064a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0632\u064a\u062a<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">\u0644\u0627<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0633\u0639\u0629 \u0644\u0644\u0632\u064a\u062a<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">6.5 \u0644\u062a\u0631<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0623\u0642\u0635\u0649 \u0641\u062a\u0631\u0629 \u0644\u062a\u063a\u064a\u064a\u0631 \u0627\u0644\u0632\u064a\u062a<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">500 \u0633\u0627\u0639\u0629<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u062f\u0631\u062c\u0629 \u0644\u0632\u0648\u062c\u0629 \u0627\u0644\u0632\u064a\u062a SAE<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">80W-90<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0645\u0648\u0627\u062f \u0628\u0646\u0627\u0621 \u0627\u0644\u062a\u063a\u0644\u064a\u0641<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">\u062d\u062f\u064a\u062f \u0627\u0644\u0632\u0647\u0631 GG25<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"text-align: center; height: 23px; width: 38.3513%;\"><strong>\u0648\u0632\u0646<\/strong><\/td>\n<td style=\"height: 23px; width: 61.4098%;\">106 \u0643\u062c\u0645<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0644\u0642\u062f \u0623\u062a\u0645\u0645\u0646\u0627 \u062a\u062f\u0642\u064a\u0642\u064b\u0627 \u0645\u0646 \u0637\u0631\u0641 \u062b\u0627\u0644\u062b \u0644\u0644\u0645\u0648\u0631\u062f\u064a\u0646 \u0648\u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0634\u0631\u0643\u0627\u062a \u0628\u062f\u0639\u0645 \u0645\u0646 SGS \/ T\u00dcV Rheinland. \u064a\u0633\u0627\u0639\u062f \u0647\u0630\u0627 \u0627\u0644\u062a\u062d\u0642\u0642 \u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0646 \u0639\u0644\u0649 \u0645\u0631\u0627\u062c\u0639\u0629 \u0647\u0648\u064a\u0629 \u0627\u0644\u0634\u0631\u0643\u0629\u060c \u0648\u0639\u0645\u0644\u064a\u0627\u062a\u0647\u0627 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\u060c \u0648\u0645\u0644\u0641 \u062a\u0639\u0631\u064a\u0641 \u0627\u0644\u0645\u0648\u0631\u062f\u060c \u0648\u0642\u062f\u0631\u0627\u062a\u0647\u0627 \u0627\u0644\u062a\u0635\u0646\u064a\u0639\u064a\u0629 \u0627\u0644\u0639\u0627\u0645\u0629. \u0648\u064a\u0645\u0643\u0646 \u062a\u0648\u0641\u064a\u0631 \u062a\u0642\u0627\u0631\u064a\u0631 \u0641\u062d\u0635 \u062e\u0627\u0635\u0629 \u0628\u0627\u0644\u0645\u0646\u062a\u062c\u060c \u0648\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u0645\u0648\u0627\u062f\u060c \u0623\u0648 \u0633\u062c\u0644\u0627\u062a \u0627\u0644\u0627\u0645\u062a\u062b\u0627\u0644 \u0648\u0641\u0642\u064b\u0627 \u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0637\u0644\u0628.<\/p>\n<p><strong>\u0627\u0644\u062d\u062f \u0627\u0644\u0623\u062f\u0646\u0649 \u0644\u0643\u0645\u064a\u0629 \u0627\u0644\u0637\u0644\u0628 (MOQ):<\/strong>\u00a0\u064a\u062a\u0645 \u062a\u062d\u062f\u064a\u062f\u0647\u0627 \u0628\u0645\u0631\u0648\u0646\u0629 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0646\u0648\u0639 \u0627\u0644\u0645\u0646\u062a\u062c \u0648\u0645\u0642\u062f\u0627\u0631 \u0627\u0644\u0637\u0644\u0628.<\/p>\n<p><strong>\u0623\u0645\u062b\u0644\u0629:<\/strong>\u00a0\u064a\u0645\u0643\u0646 \u0644\u0644\u0639\u0645\u0644\u0627\u0621 \u0627\u0644\u062c\u062f\u062f \u0637\u0644\u0628 \u0645\u0646 1 \u0625\u0644\u0649 5 \u0639\u064a\u0646\u0627\u062a \u0641\u064a \u0638\u0644 \u0627\u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629.<\/p>\n<p><strong>\u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u062e\u062a\u0644\u0637\u0629:<\/strong>\u00a0\u064a\u062a\u0645 \u062f\u0639\u0645 \u0627\u0644\u062c\u0645\u0639 \u0628\u064a\u0646 \u0646\u0645\u0627\u0630\u062c \u0645\u062e\u062a\u0644\u0641\u0629\u061b \u064a\u062c\u0628 \u0623\u0646 \u064a\u0635\u0644 \u0625\u062c\u0645\u0627\u0644\u064a \u0645\u0628\u0644\u063a \u0627\u0644\u0637\u0644\u0628 \u0625\u0644\u0649 \u062d\u0648\u0627\u0644\u064a $1,500.<\/p>\n<p><strong>\u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0635\u063a\u064a\u0631\u0629:<\/strong>\u00a0\u064a\u062a\u0645 \u062f\u0639\u0645 \u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u0628\u062f\u0623 \u0645\u0646 \u0642\u0637\u0639\u0629 \u0623\u0648 \u0642\u0637\u0639\u062a\u064a\u0646\u060c \u0648\u0644\u0643\u0646 \u0633\u0639\u0631 \u0627\u0644\u0648\u062d\u062f\u0629 \u0633\u064a\u0643\u0648\u0646 \u0623\u0639\u0644\u0649 \u0646\u0633\u0628\u064a\u064b\u0627.<\/p>\n<p><strong>\u0645\u0647\u0644\u0629:<\/strong>\u00a010-25 \u064a\u0648\u0645 \u0639\u0645\u0644 \u0644\u0644\u0623\u062c\u0632\u0627\u0621 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629\u061b 20-45 \u064a\u0648\u0645 \u0639\u0645\u0644 \u0644\u0644\u0645\u0643\u0648\u0646\u0627\u062a \u0627\u0644\u0645\u062e\u0635\u0635\u0629\u061b 45-120 \u064a\u0648\u0645 \u0639\u0645\u0644 \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0642\u0627\u0626\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0634\u0627\u0631\u064a\u0639.<\/p>\n<p><strong>\u0634\u0631\u0648\u0637 \u0627\u0644\u062a\u062c\u0627\u0631\u0629:<\/strong>\u00a0\u064a\u062a\u0645 \u062f\u0639\u0645 \u0634\u0631\u0648\u0637 EXW \u0648 FOB \u0648 CIF \u0648 DAP \u0628\u0634\u0643\u0644 \u0639\u0627\u0645\u061b \u0648\u064a\u0645\u0643\u0646 \u0627\u0644\u062a\u0641\u0627\u0648\u0636 \u0639\u0644\u0649 \u0634\u0631\u0648\u0637 FCA \u0648 CFR \u0648 CPT \u0648 CIP \u0648 DDP \u0628\u0634\u0643\u0644 \u062e\u0627\u0635.<\/p>\n<h2>\u0623\u0628\u0639\u0627\u062f \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 T-331A<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8737 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-1.webp\" alt=\"\u0623\u0628\u0639\u0627\u062f \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 T-331A\" width=\"1616\" height=\"973\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-1.webp 1616w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-1-1280x771.webp 1280w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-1-980x590.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-1-480x289.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1616px, 100vw\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8738 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-2.webp\" alt=\"\u0623\u0628\u0639\u0627\u062f \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 T-331A\" width=\"1828\" height=\"860\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-2.webp 1828w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-2-1280x602.webp 1280w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-2-980x461.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/T-331A-Flail-Mower-Gearbox-Dimensions-2-480x226.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1828px, 100vw\" \/><\/p>\n<h2>Key Features of the T-331A Flail Mower Gearbox<\/h2>\n<p>1. \u0627\u0644\u0645\u062a\u0627\u0646\u0629 \u0648\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0647\u064a\u0643\u0644\u064a\u0629<br \/>\nThe T-331A houses its gear train inside a cast iron GG25 casing that absorbs shock loads, resists cracking under sudden torque spikes, and dissipates heat during prolonged cutting sessions. A corrosion-resistant surface finish protects the exterior from rain, morning dew, and chemical exposure commonly found in agricultural settings. Reinforced sealing at every joint prevents dirt, plant sap, and stone dust from reaching the flail mower gearbox bearings and gear teeth, extending the useful life of the entire assembly even under harsh operating conditions found in tropical or coastal farming regions.<\/p>\n<p>2. Ratio Options and Modular Output<br \/>\nWith its 1:1.94 flail mower gearbox ratio, the T-331A multiplies the tractor’s 540 RPM PTO input to approximately 1,048 RPM at the output shaft, delivering the precise drum speed most flail mower manufacturers specify for clean vegetation shredding. Three output shaft positions (X, Y, Z) all share a 1″3\/4 Z-20 spline interface, giving machine builders and end users the flexibility to configure the unit for left-side, right-side, or center-mounted rotor drives. This modular layout simplifies integration across different drum diameters, knife systems, and mower frame widths without requiring custom adapters.<\/p>\n<p>3. \u0645\u0646\u0639 \u0627\u0644\u062a\u0633\u0631\u0628 \u0648\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0622\u0643\u0644<br \/>\nEvery shaft exit point on the T-331A is fitted with a multi-lip flail mower gearbox oil seal rated for continuous rotational speeds and elevated operating temperatures. These seals form a double barrier that keeps lubricant inside while blocking fine dust, wet grass clippings, and grit from contaminating the oil bath. The housing itself receives a protective coating that resists salt spray and acidic soil runoff, which is especially important for operators in coastal farmlands or regions with high soil acidity. This attention to sealing detail reduces the frequency of flail mower gearbox repair and keeps unplanned downtime to a minimum.<\/p>\n<p>4. \u0646\u0642\u0644 \u0627\u0644\u0637\u0627\u0642\u0629 \u0648\u062a\u062d\u0648\u064a\u0644 \u0627\u0644\u0633\u0631\u0639\u0629<br \/>\nAt its core, the T-331A flail mower PTO gearbox converts the tractor’s standard 540 RPM PTO speed into a lower drum RPM while boosting torque to the level the flail rotor requires for consistent chopping performance. The bevel gear set inside the housing is precision-ground and heat-treated for uniform load distribution across every tooth face, which reduces noise, vibration, and localized wear. Even when field conditions throw sudden loads at the rotor, such as hitting a thick patch of woody brush or uneven terrain, the gear geometry keeps rotational speed stable so that the cutting quality remains uniform from one end of the pass to the other.<\/p>\n<p>5. \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u0648\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0632\u0627\u0626\u062f<br \/>\nThe driveline feeding this gearbox typically includes a slip clutch or shear bolt mechanism that interrupts torque transmission the instant flails jam against a large rock, buried fencepost, or other immovable obstacle. This sacrificial protection saves the internal gears, bearings, and shafts from catastrophic failure. Operators using this 540 RPM flail mower gearbox in rocky pastures or roadside verges benefit greatly from properly matched overload protection, because a single impact event without it can crack a gear tooth or bend an output shaft, leading to costly repairs and lost working days during peak mowing season.<\/p>\n<p>6. Direct Comer T-331A Replacement<br \/>\nThis unit is a bolt-on Comer flail mower gearbox replacement that matches the original T-331A in mounting hole pattern, shaft spline count, flange dimensions, and gear ratio. That means you can swap out a worn or damaged Comer gearbox without modifying your mower frame, PTO driveline, or rotor coupling. The spline profiles on all three shafts replicate the factory specification exactly, so existing yokes and coupling halves slide on without machining. For fleet operators managing multiple mowers, this interchangeability cuts inventory costs and simplifies parts sourcing compared to purchasing individual flail mower gearbox parts for each machine.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8748 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-14.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-14.webp 1000w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-14-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-14-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1000px, 100vw\" \/><\/p>\n<h2 class=\"aicc_heading\">Working Principle<\/h2>\n<p>Flail mower gearboxes sit at the mechanical heart of every flail mowing system. They receive rotational power from the tractor’s PTO shaft, which commonly operates at 540 RPM for standard agricultural machinery, and convert that input into the specific speed and torque profile the flail rotor needs to cut, shred, and mulch vegetation. The T-331A accomplishes this through a pair of precision-machined bevel gears inside a sealed, oil-bathed cast iron chamber. When the tractor operator engages the PTO, the input shaft spins and transfers that rotation through the driving bevel gear to the driven bevel gear, which sits at a right angle. This angular transfer is why this type of unit is often called a flail mower right angle gearbox, since the power path changes direction by 90 degrees as it passes through the gear mesh.<\/p>\n<p>The 1:1.94 ratio means that for every 1 revolution of the input shaft, the output shaft turns approximately 1.94 revolutions. This speed-increasing configuration takes the tractor’s 540 RPM PTO input and multiplies it to roughly 1,048 RPM at the output, which falls within the recommended rotor speed range for most commercial flail mowers. At the same time, the gear mesh adjusts the torque balance: because the output spins faster, the torque at the output is proportionally lower than at the input, but the combined effect of speed and torque at the rotor is tuned to match the cutting loads that grass, weeds, brush, and crop residues present. The gearbox generates a maximum output torque of 1,820 Nm, giving the flail rotor enough force to chop through tough woody stems without stalling.<\/p>\n<p>Inside the housing, the bevel gears are supported by tapered roller bearings that absorb both radial and axial loads. These bearings are pre-loaded during factory assembly to eliminate shaft play and ensure consistent gear tooth contact patterns under load. Proper bearing pre-load is one of the factors that separates a long-lasting flail mower gearbox assembly from one that wears out prematurely. The oil bath that surrounds the gears serves two purposes: it lubricates the gear teeth and bearing races to reduce friction and heat, and it carries away metal particles generated by normal wear so they can settle at the bottom of the housing rather than circulating between the gear teeth.<\/p>\n<p>The housing itself plays a structural role beyond simply containing the oil and gears. Cast iron GG25 offers high compressive strength and vibration damping properties, which means the housing absorbs the shock pulses generated each time a flail strikes dense vegetation or a hidden stone. This damping effect protects the gear teeth from impact fatigue that would otherwise accumulate over thousands of operating hours. The exterior of the housing includes mounting flanges with bolt holes positioned to match the Comer T-331A pattern, along with reinforcement ribs that stiffen the structure without adding unnecessary weight. At 106 kg, the T-331A strikes a practical balance between structural mass and handling convenience during installation.<\/p>\n<p>In daily field use, the operator simply engages the tractor PTO at the rated 540 RPM, and the gearbox takes over from there. The internal gears accelerate the rotor to cutting speed within seconds. Under varying load conditions, such as transitioning from thin grass into a patch of thick brush, the gear mesh maintains a consistent speed ratio. The tractor engine governor compensates for the increased torque demand, and the gearbox transmits that additional power without slippage or speed fluctuation. This steady-state performance is what allows flail mower gearbox systems to produce an even, mulched finish across the entire cutting width, regardless of how the vegetation density changes from one meter to the next.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8700 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-4.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1200\" height=\"900\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-4.webp 1200w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-4-980x735.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-4-480x360.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1200px, 100vw\" \/><\/p>\n<h2>Applications of the T-331A Flail Mower Gearbox<\/h2>\n<div>\n<h3>\u062a\u0642\u0637\u064a\u0639 \u0627\u0644\u0646\u0628\u0627\u062a\u0627\u062a \u0648\u0635\u064a\u0627\u0646\u0629 \u0627\u0644\u0645\u0631\u0627\u0639\u064a<\/h3>\n<p>This gearbox powers the flail drum to cut, mulch, and redistribute grass clippings, weed growth, and crop residues across open pastures and hay fields. The mulched material decomposes quickly and returns nutrients to the soil, making it a preferred choice among livestock farmers who manage grazing rotations and need clean, even pasture surfaces for animal health and feed quality improvement throughout the growing season.<\/p>\n<\/div>\n<div>\n<h3>\u0645\u0643\u0627\u0641\u062d\u0629 \u0627\u0644\u0634\u062c\u064a\u0631\u0627\u062a \u0648\u0627\u0644\u0623\u0634\u0648\u0627\u0643<\/h3>\n<p>High-torque configurations of this heavy duty flail mower gearbox handle the increased resistance generated when flails strike woody stems, blackberry canes, scrub oak, and other dense vegetation. The 1,820 Nm output torque provides enough force to shred material up to 50 mm in diameter, depending on flail type and drum speed, making the T-331A suitable for land clearing, fence line maintenance, and abandoned field reclamation projects where brush has taken over previously cultivated ground.<\/p>\n<\/div>\n<div>\n<h3>\u0623\u0639\u0645\u0627\u0644 \u062a\u062d\u062a \u0635\u0641\u0648\u0641 \u0627\u0644\u0643\u0631\u0648\u0645 \u0648\u0627\u0644\u0628\u0633\u0627\u062a\u064a\u0646<\/h3>\n<p>Compact flail mower setups that use the T-331A gearbox can be configured for narrow inter-row work in vineyards, apple orchards, and olive groves. The gearbox’s multi-position output shaft arrangement allows it to fit offset mower frames that swing beneath vine trellises and tree canopies. Keeping the under-row vegetation trimmed reduces pest habitat, improves air circulation around the root zone, and minimizes competition for soil moisture and nutrients during the fruit-setting period.<\/p>\n<\/div>\n<div>\n<h3>\u0642\u0635 \u0627\u0644\u0639\u0634\u0628 \u0639\u0644\u0649 \u062c\u0648\u0627\u0646\u0628 \u0627\u0644\u0637\u0631\u0642 \u0648\u0627\u0644\u0628\u0644\u062f\u064a\u0627\u062a<\/h3>\n<p>Municipal maintenance crews and highway departments rely on tractor-mounted flail mowers fitted with durable gearboxes like the T-331A for regular roadside verge cutting, median strip maintenance, and ditch bank vegetation management. The sealed housing and reinforced seals protect the internals from gravel and road debris impact, while the consistent rotor speed ensures a uniform cut height that meets local safety and visibility standards along public roadways and pedestrian pathways.<\/p>\n<\/div>\n<div>\n<h3>Post-Harvest Crop Residue Management<\/h3>\n<p>After grain, corn, or sunflower harvesting, thick stubble and stalk residue remain in the field. A flail mower driven by the T-331A gearbox shreds this material into small pieces that can be incorporated into the soil during the next tillage pass. This process accelerates decomposition, returns organic matter to the topsoil, and reduces the risk of pest and disease carryover into the following growing season, making it a key step in sustainable crop rotation management.<\/p>\n<\/div>\n<div>\n<h3>Solar Farm and Utility Corridor Maintenance<\/h3>\n<p>Ground-mounted solar panel arrays and power line corridors require regular vegetation management to prevent shading, fire risk, and equipment interference. Flail mowers equipped with the T-331A gearbox provide controlled, low-profile cutting that avoids throwing debris toward panels or overhead cables. The gearbox’s consistent output speed produces uniform cut quality, which satisfies the maintenance specifications that solar farm operators and utility companies include in their vegetation management contracts.<\/p>\n<\/div>\n<div>\n<h3>Airport Runway and Perimeter Grounds<\/h3>\n<p>Airports maintain strict vegetation height limits around runways, taxiways, and perimeter fencing to reduce bird attraction and maintain instrument landing system signal clearance. Flail mowers powered by this gearbox produce a finely mulched finish without ejecting large clippings or stones that could be ingested by aircraft engines. The reliability and consistent performance of the T-331A gearbox helps grounds crews meet tight mowing schedules that are dictated by flight operations and regulatory inspections.<\/p>\n<\/div>\n<div>\n<h3>Golf Course Rough and Perimeter Zones<\/h3>\n<p>Beyond the closely maintained fairways and greens, golf courses have extensive rough areas and perimeter zones that benefit from flail mowing. The T-331A gearbox supports the higher cutting heights used in these zones while delivering a clean, mulched finish that discourages weed seed germination. Course maintenance teams appreciate the smooth power delivery and low vibration characteristics of this flail mower gear box, which reduce operator fatigue during long shifts covering large out-of-play areas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8627 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-Applications-2.webp\" alt=\"\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629\" width=\"1200\" height=\"1200\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-Applications-2.webp 1200w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-Applications-2-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-Applications-2-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1200px, 100vw\" \/><\/p>\n<h2>How to Properly Lubricate the T-331A Flail Mower Gearbox<\/h2>\n<p>1. \u0627\u062e\u062a\u0631 \u062f\u0631\u062c\u0629 \u0627\u0644\u0632\u064a\u062a \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629<br \/>\nThe T-331A requires SAE 80W-90 gear oil meeting API GL-5 specifications. This grade provides the film strength and viscosity range needed to protect the bevel gears and bearings across typical operating temperatures from cold morning startups to sustained cutting at high ambient temperatures. Do not substitute automatic transmission fluid, engine oil, or synthetic gear oils of a different viscosity grade unless the manufacturer specifically approves the alternative. Using the wrong <a href=\"https:\/\/korea-transmission.com\/ar\/flail-mower-gearbox\/\"><strong>\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629<\/strong><\/a> oil can accelerate gear wear and void warranty coverage.<\/p>\n<p>2. Fill to the Correct Level<br \/>\nThe maximum oil capacity of the T-331A is 6.5 liters. Fill the gearbox through the designated fill port until oil reaches the level check plug. Overfilling raises the oil temperature due to excess churning and can force oil past the seals, while underfilling leaves gear teeth and bearings without adequate lubrication. Always check the oil level with the gearbox in its installed, operating position on the mower frame, not on a workbench, because the housing geometry affects where the oil settles inside.<\/p>\n<p>3. Perform the Initial Break-In Oil Change<br \/>\nNew gears and bearings produce fine metal particles during the initial break-in period as high spots on the gear teeth wear into their final contact pattern. Drain and replace the oil after the first 50 to 70 operating hours to flush out these particles before they can cause abrasive damage. Inspect the drained oil for excessive metal content or discoloration that might indicate a manufacturing defect or installation problem requiring immediate attention before continued use.<\/p>\n<p>4. Maintain Regular Oil Change Intervals<br \/>\nAfter the break-in change, replace the oil every 500 operating hours or at least once per year, whichever comes first. If the gearbox operates in extremely dusty conditions, high ambient temperatures above 35 degrees Celsius, or encounters frequent impact loads from rocky terrain, consider shortening the interval to 300 to 400 hours. Regular oil changes remain the single most effective maintenance practice for extending the life of any flail mower gearbox replacement unit and preventing premature failure of internal components.<\/p>\n<p>5. Inspect Seals During Every Oil Change<br \/>\nEach time you drain the oil, visually inspect all shaft seals for signs of leakage, cracking, or hardening. A compromised seal allows dirt and moisture to enter the oil bath, which degrades the lubricant and accelerates bearing and gear wear. Replace any seal that shows visible damage or has allowed oil to weep past the lip. Keeping a set of replacement seals in your workshop inventory eliminates delays when a seal issue is discovered during a scheduled maintenance session.<\/p>\n<p>6. Check Oil Level Before Each Use<br \/>\nBefore starting each mowing session, check the oil level through the level plug. Oil can be lost gradually through minor seal seepage or consumed through evaporation during hot-weather operation. Running the gearbox even briefly with a low oil level can cause localized overheating at the gear mesh zone, which leads to surface pitting and accelerated wear. A quick level check takes less than a minute and can prevent hundreds of dollars in repair costs from heat-related gear damage.<\/p>\n<p>7. Drain Completely Before Seasonal Storage<br \/>\nIf the mower will be stored for more than three months between seasons, drain the oil completely, refill with fresh oil, and run the gearbox briefly at low speed to coat all internal surfaces with a protective oil film. This prevents moisture condensation from forming on bare metal surfaces inside the housing during storage, which can cause pitting corrosion on gear teeth and bearing races. When the mower returns to service, check the oil level again and top off if needed before beginning field work.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8757 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-23.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-23.webp 1000w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-23-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-23-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1000px, 100vw\" \/><\/p>\n<h2>\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629 \u0645\u0642\u0627\u0628\u0644 \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628<\/h2>\n<h3>\u0645\u0627 \u0647\u064a \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629\u061f<\/h3>\n<p>Flail mower gearboxes are specialized power transmission units built for agricultural and land management machinery. They receive rotational power from a tractor’s PTO (typically at 540 RPM) and transfer it to the flail rotor while regulating speed and torque to suit different crop residues and terrain conditions. Their heavy-duty construction, with cast iron or alloy steel housings, sealed bearings, and hardened bevel gears, ensures dependable performance across hundreds of operating hours per season, even in abrasive and impact-prone field environments.<\/p>\n<h4>\u0645\u0632\u0627\u064a\u0627 \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629<\/h4>\n<ul>\n<li>High torque capacity handles thick brush, woody stems, and tangled vegetation that would stall lighter gearbox designs, making them suitable for demanding clearing and maintenance work across diverse terrain types.<\/li>\n<li>Multiple ratio options allow operators to match the drum speed precisely to the cutting conditions, optimizing fuel efficiency and cut quality for grass, weeds, crop residue, or brush depending on seasonal needs.<\/li>\n<li>Robust sealing systems keep contaminants out of the oil bath, extending service intervals and reducing total cost of ownership over the life of the gearbox in dusty, wet, and debris-heavy operating environments.<\/li>\n<li>Integration with overload protection devices (slip clutches or shear bolts) shields the gearbox internals from impact damage caused by rocks, stumps, or hidden obstacles in the mowing path.<\/li>\n<\/ul>\n<h4>\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629<\/h4>\n<ul>\n<li>Pasture management and grassland maintenance on livestock farms, dairy operations, and rural estates where regular mowing controls weed growth and promotes healthy forage regrowth for grazing animals.<\/li>\n<li>Municipal and highway vegetation control along roadsides, medians, drainage ditches, and public parks where safety visibility standards and aesthetic requirements must be met on a regular schedule.<\/li>\n<li>Vineyard and orchard under-canopy weed management where compact, offset-mounted flail mowers keep the root zones clear without damaging trunks, trellises, or irrigation lines.<\/li>\n<li>Land clearing and reclamation projects that require shredding overgrown scrub, small-diameter saplings, and invasive plant species before re-seeding or replanting can proceed.<\/li>\n<\/ul>\n<h3>\u0645\u0627 \u0647\u064a \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628\u061f<\/h3>\n<p>A tractor PTO-driven lawn mower gearbox is a core component in landscaping and grounds maintenance equipment designed for cutting large areas of grass to a uniform height. Connected to the tractor’s PTO shaft, it converts and adjusts engine power to spinning mower blades at the speed and torque needed for a clean, even cut. Built from durable materials like cast iron or aluminum, these gearboxes handle the demands of continuous mowing across various turf types and ground conditions. Inside, the gears are engineered for smooth speed adjustment that produces consistent cutting results across the full width of the mowing deck.<\/p>\n<h4>\u0645\u0632\u0627\u064a\u0627 \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628<\/h4>\n<ul>\n<li>Lighter weight and compact profile allow installation on multi-spindle mower decks that cover wide cutting swaths, improving productivity for grounds maintenance crews working on large turf areas.<\/li>\n<li>Higher blade speed output produces a cleaner cut on fine turf grass, which promotes faster healing of the grass blade tip and reduces the risk of lawn disease compared to ragged cuts from dull or slow-spinning blades.<\/li>\n<li>Simplified internal gear trains require less maintenance and consume less lubricant, making them cost-effective for operations that primarily cut soft grass and do not encounter the heavy impact loads associated with brush cutting.<\/li>\n<li>Easy access to seals, bearings, and blade spindle connections simplifies routine service, reducing the labor time needed for oil changes, blade replacement, and seasonal maintenance at the start and end of each cutting year.<\/li>\n<\/ul>\n<h4>\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628<\/h4>\n<ul>\n<li>Large-scale grass cutting on parks, golf courses, sports fields, and residential lawns where a uniform, manicured finish is required for aesthetic presentation and healthy turf maintenance throughout the growing season.<\/li>\n<li>Bush and shrub maintenance in commercial landscapes, public gardens, and institutional grounds where overgrowth must be managed regularly to maintain clear sightlines, accessibility, and a professional appearance.<\/li>\n<li>Orchard and vineyard floor management where undergrowth between rows must be kept short to reduce pest habitat and competition for water and nutrients without disturbing the soil structure or root systems.<\/li>\n<li>Roadside vegetation management along highways and municipal streets where regular grass cutting enhances driver visibility, prevents wildlife from hiding near the road edge, and maintains a tidy appearance for community standards.<\/li>\n<li>Professional landscaping operations that require precise control over cutting height and finish quality when shaping and maintaining diverse landscapes in parks, estates, hotel grounds, and corporate campus environments.<\/li>\n<\/ul>\n<h3>Comparison Table:<\/h3>\n<div>\n<table style=\"height: 400px; width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\">\u0645\u064a\u0632\u0629<\/th>\n<th style=\"text-align: center;\">\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631<\/th>\n<th style=\"text-align: center;\">\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center;\">Primary Application<\/td>\n<td style=\"text-align: center;\">Agricultural mowing, brush clearing, residue management<\/td>\n<td style=\"text-align: center;\">Turf grass cutting, landscaping, parks<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Typical Torque Range<\/td>\n<td style=\"text-align: center;\">500 to 3,500+ Nm<\/td>\n<td style=\"text-align: center;\">50 to 500 Nm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u0645\u0648\u0627\u062f \u0628\u0646\u0627\u0621 \u0627\u0644\u062a\u063a\u0644\u064a\u0641<\/td>\n<td style=\"text-align: center;\">Cast iron (GG25, GG30) or alloy steel<\/td>\n<td style=\"text-align: center;\">Cast aluminum or light-duty cast iron<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u0646\u0648\u0639 \u0627\u0644\u062a\u0631\u0648\u0633<\/td>\n<td style=\"text-align: center;\">Spiral bevel, hardened alloy steel<\/td>\n<td style=\"text-align: center;\">Spur or helical, standard steel<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u0646\u0637\u0627\u0642 \u0627\u0644\u0648\u0632\u0646<\/td>\n<td style=\"text-align: center;\">15 to 110+ kg<\/td>\n<td style=\"text-align: center;\">3 to 20 kg<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0635\u062f\u0645\u0627\u062a<\/td>\n<td style=\"text-align: center;\">High (designed for rocks, stumps, debris)<\/td>\n<td style=\"text-align: center;\">Low to moderate (grass and light brush)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0632\u0627\u0626\u062f<\/td>\n<td style=\"text-align: center;\">Slip clutch or shear bolt in driveline<\/td>\n<td style=\"text-align: center;\">Typically not included<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u0633\u0639\u0629 \u0627\u0644\u0632\u064a\u062a<\/td>\n<td style=\"text-align: center;\">1.5 to 6.5+ liters<\/td>\n<td style=\"text-align: center;\">0.2 to 1.0 liters<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\u062a\u0648\u0627\u062a\u0631 \u0627\u0644\u0635\u064a\u0627\u0646\u0629<\/td>\n<td style=\"text-align: center;\">Every 500 hours or annually<\/td>\n<td style=\"text-align: center;\">Every 200 hours or seasonally<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8754 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-20.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-20.webp 1000w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-20-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-20-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1000px, 100vw\" \/><\/p>\n<h2>\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0627\u0644\u062f\u0648\u0627\u0631\u0629 \u0648\u0639\u0645\u0648\u062f \u0646\u0642\u0644 \u0627\u0644\u062d\u0631\u0643\u0629 PTO<\/h2>\n<p>The flail mower gearbox and the PTO driveline shaft form a tightly coupled power delivery system that connects the tractor’s engine output to the flail rotor. Neither component works in isolation: the gearbox depends on the driveline shaft to deliver rotational power smoothly and at the correct angle, while the driveline shaft relies on the gearbox to absorb and convert that power without sending harmful vibrations or shock loads back up the drivetrain. Understanding how these two components interact is essential for selecting the right flail mower gearbox replacement and maintaining reliable, safe operation in the field.<\/p>\n<p>A PTO driveline shaft for a flail mower is a telescoping mechanical link that transfers rotational power from the tractor’s Power Take-Off stub to the gearbox input shaft. It consists of two tubular halves connected by a sliding spline joint that allows the shaft to change length as the mower moves up and down relative to the tractor during operation over uneven terrain. At each end of the shaft, a universal joint (U-joint) accommodates angular misalignment between the tractor’s PTO stub and the gearbox input shaft. Protective guards enclose the spinning shaft and U-joints to prevent contact with clothing, limbs, or loose objects, which is a critical safety requirement on any agricultural PTO application.<\/p>\n<p>The splined connection where the driveline shaft meets the gearbox input must match exactly. For the T-331A, all three shaft positions use a 1″3\/4 Z-20 spline profile, so the driveline yoke must carry the same specification. A mismatch in spline count, diameter, or profile will prevent engagement or cause rapid wear. When replacing a gearbox, always verify that the existing driveline yoke fits the new unit before completing the installation. If the yoke does not slide smoothly onto the new gearbox input shaft with minimal resistance, stop and investigate rather than forcing the connection.<\/p>\n<p>Operating angle is another factor that directly affects both the <a href=\"https:\/\/korea-transmission.com\/ar\/pto-shafts\/\"><strong>\u0639\u0645\u0648\u062f \u0646\u0642\u0644 \u0627\u0644\u062d\u0631\u0643\u0629 PTO<\/strong><\/a> and the gearbox. U-joints work most efficiently when the operating angle between the tractor PTO stub and the gearbox input shaft stays below 25 to 30 degrees. Exceeding this angle puts uneven loads on the U-joint cross bearings, generates vibration, and sends pulsating torque into the gearbox input shaft rather than smooth rotational power. This pulsation accelerates bearing wear inside the gearbox and can cause premature gear tooth pitting. Proper adjustment of the mower hitch position and three-point linkage height keeps the driveline angle within safe limits during normal operation.<\/p>\n<p>Torque capacity is the bridge between these two components. The driveline shaft must be rated to handle at least as much torque as the gearbox can transmit. For the T-331A, with its 1,820 Nm maximum output torque and 205.9 kW power rating at 540 RPM, the driveline shaft should carry a matching or higher torque rating. An undersized driveline is the weak link in the system: it may twist, shear, or overheat its U-joint bearings before the gearbox reaches its operational limits, leading to field breakdowns that could have been prevented by proper sizing during initial setup or flail mower gearbox repair and replacement projects.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"et-waypoint et_pb_animation_off et_pb_animation_off_tablet et_pb_animation_off_phone wp-image-343 et-animated aligncenter\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2025\/04\/PTO-Shaft.webp\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1000px, 100vw\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2025\/04\/PTO-Shaft.webp 1000w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2025\/04\/PTO-Shaft-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2025\/04\/PTO-Shaft-480x480.webp 480w\" alt=\"\u0639\u0645\u0648\u062f \u0646\u0642\u0644 \u0627\u0644\u062d\u0631\u0643\u0629\" width=\"1000\" height=\"1000\" \/><\/p>\n<h2>How to Select the Right Agricultural Gearbox for Flail Mower<\/h2>\n<p>1. Identify Your Machine Requirements First<br \/>\nBefore opening any gearbox catalog, document your mower’s brand, model, cutting width, and the conditions you most often mow in. If you are replacing a worn unit, photograph the old gearbox mounted and unmounted, capturing the input and output shaft interfaces, the nameplate, and the mounting hole spacing with a ruler in the frame. These details eliminate guesswork and prevent the common mistake of ordering a unit that looks similar but differs by a few millimeters in flange spacing or one tooth in spline count.<\/p>\n<p>2. Match Power Rating to Your Toughest Work<br \/>\nA gearbox rated at 45 HP does not mean you can bolt it onto any 45 HP tractor and expect it to last. Size the gearbox for the hardest work you will ask of it, not the average load. If you regularly cut brush, encounter hidden stones, or work on uneven ground where shock loads spike well above steady-state cutting forces, leave a generous power margin. The T-331A’s 280 HP (205.9 kW) rating gives substantial headroom for tractors in the 100 to 200 HP class, covering everything from medium-duty pasture work to demanding roadside clearing.<\/p>\n<p>3. Verify the Gear Ratio and Rotation Direction<br \/>\nThe flail mower gearbox ratio determines the output shaft speed, and the rotation direction must match your rotor’s design. A replacement gearbox may bolt to the frame perfectly but spin the rotor backward, which creates a safety hazard and destroys the cutting quality. Always confirm both the ratio (1:1.94 for the T-331A) and the output rotation direction against your original gearbox specifications or the mower manufacturer’s documentation before purchasing.<\/p>\n<p>4. \u0627\u062e\u062a\u0631 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629 \u0645\u0646 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0632\u0627\u0626\u062f<br \/>\nShear bolts snap first to protect the gearbox, but require replacement after each event. Slip clutches absorb repeated shock loads without a bolt change but need annual maintenance to prevent the friction discs from rusting together during storage. If you mow in rocky conditions or unpredictable terrain, a properly maintained slip clutch offers more forgiving protection. In either case, never substitute a higher-grade shear bolt than specified, as this defeats the protection and transfers damaging forces directly into the gearbox gears and bearings.<\/p>\n<p>5. Check Shaft Spline Compatibility<br \/>\nThe input and output shafts must match your existing driveline yokes and rotor couplings in both spline count and diameter. The T-331A uses 1″3\/4 Z-20 splines on all three positions, which is the most common specification for this power class. If your current setup uses a different spline profile, you will need adapter yokes or a different gearbox model. Verifying spline compatibility before ordering saves the cost and delay of return shipping on a unit that does not fit.<\/p>\n<p>6. Consider Mounting Dimensions and Frame Fit<br \/>\nMeasure the mounting bolt pattern on your mower frame and compare it to the gearbox flange dimensions. The T-331A matches the Comer T-331A bolt pattern exactly, with specified hole positions on the top flange (N.4xM16, diameter 205 mm), side flanges (N.4xM10, diameter 145 mm), and base (N.8xM20, N.4xM10, diameter 140 mm). Even a 5 mm difference in bolt circle diameter can prevent installation, so measure carefully rather than relying on visual similarity.<\/p>\n<p>7. Evaluate Cooling and Lubrication Needs<br \/>\nLong cutting sessions in hot weather generate significant heat inside the gearbox. The T-331A’s cast iron housing provides good heat dissipation, and its 6.5-liter oil capacity gives a generous thermal buffer. If you routinely work in ambient temperatures above 35 degrees Celsius or cut dense material for extended periods, ask about operating temperature limits and consider shortening your oil change intervals. Proper lubrication and adequate cooling are the factors that ultimately determine whether a gearbox lasts five seasons or fifteen.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8699 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-3.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1200\" height=\"900\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-3.webp 1200w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-3-980x735.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/Flail-Mower-Gearbox-3-480x360.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1200px, 100vw\" \/><\/p>\n<h2>Why Choose CMN Transmission’s Flail Mower Gearboxes?<\/h2>\n<p>Korea CMN Transmission Co., Ltd. was established in 2000 and operates from its manufacturing facility in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With over 100 factory employees dedicated to research and development, manufacturing, sales, and after-sales service, CMN Transmission has built a 25-year track record of producing agricultural gearboxes that meet the performance and durability standards demanded by farms, municipalities, and OEMs around the world. Our products are exported to more than 60 countries, including the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, China, India, Thailand, Vietnam, Turkey, Australia, and New Zealand.<\/p>\n<p>Our product range covers nearly one thousand specifications across rotary cutter gearboxes, rotary tiller gearboxes, feed mixer gearboxes, rotary mower gearboxes, fertilizer spreader gearboxes, flail mower gearboxes, post hole digger gearboxes, round baler gearboxes, square baler gearboxes, disc mower gearboxes, center pivot irrigation gearboxes, hydraulic drive gearboxes, silage machine gearboxes, orchard sprayer gearboxes, rotary rake gearboxes, combine harvester gearboxes, grain storage gearboxes, grain transportation gearboxes, corn header gearboxes, cutting bar gearboxes, poultry feeding gearboxes, and custom agricultural gearbox solutions. Beyond gearboxes, we also supply PTO shafts, U-joints, yokes, tubes, torque limiters, covers, adapters, couplings, bearings, blades, chains, and sprockets.<\/p>\n<p>With an annual production quantity exceeding 500,000 units, CMN Transmission has the manufacturing capacity and quality infrastructure to serve both individual farm operators ordering a single replacement unit and large OEMs ordering thousands of gearboxes per year. Every gearbox we produce is manufactured under CE and ISO 9001 certified management systems, ensuring consistent material quality, dimensional accuracy, and performance reliability across every unit that leaves our factory floor.<\/p>\n<p>What sets CMN Transmission apart from other flail mower gearbox replacement suppliers is our combination of manufacturing precision, technical support, and competitive pricing. Our engineering team verifies dimensional compatibility with the original Comer specifications before production, and every T-331A unit undergoes factory testing to confirm gear mesh quality, bearing pre-load, and seal integrity. We maintain a deep inventory of finished gearboxes and spare parts, which allows us to ship most standard orders within days rather than weeks. For customers with unique requirements, we support custom production based on customer drawings and specifications, whether that means a different gear ratio, a modified shaft spline, or a specialized mounting arrangement for a proprietary mower design.<\/p>\n<p>When you choose the T-331A from CMN Transmission, you are getting a gearbox backed by two decades of agricultural gearbox manufacturing experience, a fully documented quality management system, and a technical support team that understands the real-world demands of flail mowing operations across every major agricultural market on the planet. Whether you need a single replacement unit for your farm or a container load for your distribution network, we deliver the same consistent quality and responsive service that has made CMN Transmission a trusted name among global agricultural machinery partners.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8412 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/10\/0_Rotary-Tiller-Gearbox-Manufacturers-2.webp\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1200px, 100vw\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/10\/0_Rotary-Tiller-Gearbox-Manufacturers-2.webp 1200w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/10\/0_Rotary-Tiller-Gearbox-Manufacturers-2-980x719.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/10\/0_Rotary-Tiller-Gearbox-Manufacturers-2-480x352.webp 480w\" alt=\"\u0645\u0635\u0646\u0639\u064a \u0639\u0644\u0628 \u062a\u0631\u0648\u0633 \u0627\u0644\u0645\u062d\u0631\u0627\u062b \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1200\" height=\"880\" \/><\/p>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<p><strong>Q: Is the T-331A a direct bolt-on replacement for the Comer T-331A flail mower gearbox?<\/strong><br \/>\nA: Yes. The T-331A is manufactured to match the Comer T-331A in mounting hole pattern, shaft spline count (1″3\/4 Z-20), flange dimensions, and the 1:1.94 gear ratio. You can remove the original Comer unit and install this gearbox without any modifications to the mower frame, driveline, or rotor coupling, which makes it one of the most straightforward Comer flail mower gearbox replacement options available.<\/p>\n<p><strong>Q: What type of oil should I use for this flail mower gearbox?<\/strong><br \/>\nA: Use SAE 80W-90 gear oil that meets API GL-5 specifications. The maximum flail mower gearbox oil capacity is 6.5 liters. Do not substitute automatic transmission fluid or engine oil, as these do not provide the extreme-pressure film strength that bevel gear sets require under heavy loads. Fill to the level indicated by the check plug with the gearbox mounted in its operating position on the mower frame.<\/p>\n<p><strong>Q: How often should I change the oil in the T-331A flail mower gearbox?<\/strong><br \/>\nA: Perform the first oil change after 50 to 70 operating hours to flush out break-in particles. After that, change the oil every 500 operating hours or at least once per year, whichever comes first. If the gearbox operates in high-temperature or high-dust environments, shortening the interval to every 300 to 400 hours provides additional protection for the gears and bearings and extends the overall service life of the unit.<\/p>\n<p><strong>\u0633: \u0647\u0644 \u064a\u0645\u0643\u0646\u0646\u064a \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0639\u0644\u0628\u0629 \u0627\u0644\u062a\u0631\u0648\u0633 \u0647\u0630\u0647 \u0645\u0639 \u062c\u0631\u0627\u0631 PTO \u0628\u0633\u0631\u0639\u0629 1000 \u062f\u0648\u0631\u0629 \u0641\u064a \u0627\u0644\u062f\u0642\u064a\u0642\u0629\u061f<\/strong><br \/>\nA: The T-331A in its 1:1.94 ratio configuration is rated for a maximum input speed of 540 RPM. Running it at 1000 RPM would exceed the design speed of the internal components and bearings. However, the T-331A series does include other ratio configurations that are rated for 1000 RPM input (for example, the 1:1.53 and 1:1.35 variants). Contact CMN Transmission with your specific PTO speed and power requirements, and we can recommend the correct configuration for your tractor.<\/p>\n<p><strong>Q: Does the T-331A come pre-filled with gear oil?<\/strong><br \/>\nA: No. All CMN Transmission gearboxes are supplied without oil to prevent leakage and contamination during shipping. You will need to fill the gearbox with the specified SAE 80W-90 oil before the first use. This also gives you the opportunity to inspect the interior for any shipping debris and to apply a thin film of oil to the shaft seals before the initial startup to ensure proper seal lubrication from the very first revolution.<\/p>\n<p><strong>Q: What is the maximum horsepower this 540 RPM flail mower gearbox can handle?<\/strong><br \/>\nA: The T-331A is rated for a maximum input power of 205.9 kW, which equals 280 HP at 540 RPM. This rating covers the steady-state power transmission capacity under normal operating conditions. For applications where frequent shock loads are expected (rocky ground, brush clearing), sizing the tractor’s PTO output below this maximum provides a safety margin that protects the gearbox from peak stress events that exceed the rated capacity during momentary impact loads.<\/p>\n<p><strong>Q: Where can I find replacement seals and bearings for the T-331A flail mower gearbox?<\/strong><br \/>\nA: CMN Transmission stocks all flail mower gearbox parts including oil seals, bearings, gear sets, and shaft assemblies for the T-331A. Contact our sales team with your gearbox model number and the specific part you need, and we can ship replacement components directly. Because the T-331A is dimensionally compatible with the Comer T-331A, standard Comer seal and bearing part numbers may also cross-reference to the same dimensions, giving you additional sourcing flexibility from local agricultural parts distributors.<\/p>\n<p><strong>\u0633: \u0647\u0644 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0639\u0644\u0628\u0629 \u0627\u0644\u062a\u0631\u0648\u0633 \u0647\u0630\u0647 \u0639\u0644\u0649 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0648\u0635\u0644\u0629 \u062b\u0644\u0627\u062b\u064a\u0629 \u0627\u0644\u0646\u0642\u0627\u0637\u061f<\/strong><br \/>\nA: Yes. The T-331A is commonly used on 3 point flail mower gearbox configurations where the mower mounts directly to the tractor’s three-point hitch linkage. The mounting flange pattern and shaft positions are compatible with the majority of European and North American three-point hitch flail mower designs in the medium to heavy-duty power class, including models from manufacturers that originally specified the Comer T-331A or similar right-angle gearbox assemblies.<\/p>\n<p><strong>Q: How long does it take to install a replacement flail mower gearbox?<\/strong><br \/>\nA: For a direct Comer T-331A replacement, most experienced farm mechanics complete the swap in 1.5 to 3 hours, including disconnecting the driveline, unbolting the old unit, cleaning the mounting surfaces, bolting on the new gearbox, reconnecting the driveline, and filling with oil. Having the correct socket set, a torque wrench, and a small hoist or lifting aid (the T-331A weighs 106 kg) ready before you start makes the process faster and safer.<\/p>\n<p><strong>Q: Can I order a custom flail mower gearbox ratio or shaft configuration from CMN?<\/strong><br \/>\nA: Yes. CMN Transmission supports custom production based on customer drawings and specifications. If you need a different gear ratio, a non-standard shaft spline profile, or modified mounting dimensions to fit a specific flail mower model, our engineering team can evaluate the feasibility and provide a quotation. The T-331A platform has been adapted to several variant configurations (1:1.53, 1:1.35, 1:1.00, and 1:2.54 ratios are cataloged), and further customization is available for volume orders from OEMs and distributors.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8749 size-full\" src=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-15.webp\" alt=\"\u0639\u0644\u0628\u0629 \u062a\u0631\u0648\u0633 \u062c\u0632\u0627\u0632\u0629 \u0627\u0644\u0639\u0634\u0628 \u0630\u0627\u062a \u0627\u0644\u0645\u0642\u0628\u0636 \u0627\u0644\u062f\u0648\u0627\u0631\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-15.webp 1000w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-15-980x980.webp 980w, https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/11\/0_Flail-Mower-Gearbox-15-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1000px, 100vw\" \/><\/p>\n<h2>\u0622\u0631\u0627\u0621 \u0627\u0644\u0639\u0645\u0644\u0627\u0621<\/h2>\n<p><strong>Robert Henderson, Livestock Farming, United States<\/strong><br \/>\n“We manage about 1,200 acres of mixed pasture and hay ground in central Texas and go through gearboxes faster than most people because our soil is full of limestone gravel. Ordered one T-331A last March as a Comer replacement for our 2.4-meter flail mower. It bolted right onto the frame, splines matched the existing yoke perfectly. Put roughly 340 hours on it through summer and fall cutting with no leaks, no unusual noise, and the drained oil at the first change looked clean with no metal shavings. Good value compared to what we were paying for the OEM gearbox from Comer.”<\/p>\n<p><strong>\u0643\u0631\u064a\u063a \u0645\u064a\u0644\u0631\u060c \u0642\u0633\u0645 \u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0627\u0644\u0628\u0644\u062f\u064a\u0629\u060c \u0643\u0646\u062f\u0627<\/strong><br \/>\n“We run a municipal mowing fleet in southern Ontario, maintaining highway verges and ditches for the county. The T-331A 1:1.94 ratio gearbox has been on our heaviest mower since April, and after about 280 hours of pretty tough roadside work it still runs smooth. The cast iron housing handles gravel impacts much better than the aluminum unit we tried before. Shipping from Korea was about three weeks to our door, which was faster than expected. Our maintenance crew found the oil change straightforward. Will be ordering a second unit for our backup mower next spring.”<\/p>\n<p><strong>\u062e\u0627\u0641\u064a\u064a\u0631 \u0644\u0648\u0628\u064a\u0632\u060c \u0632\u0631\u0627\u0639\u0629 \u0642\u0635\u0628 \u0627\u0644\u0633\u0643\u0631\u060c \u0627\u0644\u0645\u0643\u0633\u064a\u0643<\/strong><br \/>\n“We bought the T-331A to replace a worn-out Comer on our mulcher used for clearing sugar cane residue in Veracruz. The gearbox fits perfectly, same bolt pattern, same spline profile. Quality of the casting is very solid, and the weight feels right at 106 kg. Only reason for four stars instead of five is that the delivery took about 28 days and we needed it sooner. But the price was considerably lower than the original, so overall a good deal. We have been running it for two months now, about 150 hours, with no problems at all.”<\/p>\n<p><strong>\u0645\u0627\u0631\u0643\u0648\u0633 \u0628\u064a\u0631\u064a\u0631\u0627\u060c \u062a\u0631\u0628\u064a\u0629 \u0627\u0644\u0645\u0627\u0634\u064a\u0629\u060c \u0627\u0644\u0628\u0631\u0627\u0632\u064a\u0644<\/strong><br \/>\n“I manage a 400-hectare cattle ranch in Rio Grande do Sul and the flail mower is one of the machines we use most during the rainy season when the pasture grows fast. The old Comer gearbox cracked after hitting a buried stump, and getting OEM parts shipped to Brazil was going to take months. Found CMN Transmission online and the T-331A shipped within a week of payment. Installation took less than two hours because everything lined up. The 1,820 Nm torque rating is more than enough for our 150 HP tractor. Very satisfied with this purchase.”<\/p>\n<p><strong>\u0641\u064a\u0644\u064a\u0628 \u062f\u0648\u0628\u0648\u0627\u060c \u0635\u064a\u0627\u0646\u0629 \u0645\u0632\u0627\u0631\u0639 \u0627\u0644\u0643\u0631\u0648\u0645\u060c \u0641\u0631\u0646\u0633\u0627<\/strong><br \/>\n“Our vineyard operation in the Languedoc uses flail mowers between the vine rows. We needed a replacement gearbox for our Italian-made flail mower that uses the Comer T-331A. The CMN unit was about 35 percent less expensive than ordering the Comer original through our local dealer, and the quality of machining on the shafts and housing is excellent. After 200 hours of vineyard work through the summer, the gearbox is performing without issues. Oil stays clean, seals are holding, no vibration. I would recommend this to other winegrowers looking for a reliable and affordable alternative.”<\/p>\n<p><strong>\u0643\u0644\u0627\u0648\u0633 \u0648\u064a\u0628\u0631\u060c \u062c\u0632 \u0627\u0644\u0639\u0634\u0628 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u0637\u0631\u064a\u0642\u060c \u0623\u0644\u0645\u0627\u0646\u064a\u0627<\/strong><br \/>\n“We operate an agricultural contracting business in Lower Saxony and maintain roadside verges and ditch banks for three municipalities. We ordered two T-331A gearboxes in May as Comer replacements and put them into our heavy-duty Berti mowers. Both units have now passed 400 operating hours with no issues whatsoever. The cast iron housing takes a beating from the stones our operators hit regularly along the road shoulders. The customer service from CMN was also very responsive when we needed to confirm shaft dimensions before ordering. Good product, fair price, and the technical support made the purchasing decision easy.”<\/p>\n<p><strong>\u062f\u0627\u0631\u064a\u0646 \u062a\u0627\u064a\u0644\u0648\u0631\u060c \u062a\u0627\u062c\u0631 \u0645\u0639\u062f\u0627\u062a \u0632\u0631\u0627\u0639\u064a\u0629\u060c \u0623\u0633\u062a\u0631\u0627\u0644\u064a\u0627<\/strong><br \/>\n“We supply agricultural equipment to farms across Queensland and New South Wales. A client needed a Comer T-331A replacement for his Fieldmaster flail mower and the local Comer distributor quoted a long lead time. We sourced the T-331A from CMN Transmission and it arrived in Sydney within 18 days via sea freight. Client installed it himself in under three hours. He is now at about 260 hours of heavy pasture mowing with no complaints. We have since ordered three more units for other clients. The value proposition against original Comer pricing is very compelling for the Australian market.”<\/p>\n<p><strong>\u0633\u064a\u0628\u0627\u0633\u062a\u064a\u0627\u0646 \u0631\u0648\u062f\u0631\u064a\u063a\u064a\u0632\u060c \u0632\u0631\u0627\u0639\u0629 \u0641\u0648\u0644 \u0627\u0644\u0635\u0648\u064a\u0627\u060c \u0627\u0644\u0623\u0631\u062c\u0646\u062a\u064a\u0646<\/strong><br \/>\n“I bought this gearbox for our Maschio flail mower used to clear brush on our soybean farm in Cordoba province. The 1:1.94 ratio matches our original Comer specification exactly and the three shaft positions give us flexibility for future mower upgrades. Build quality is noticeably good with clean machining on all mating surfaces. I deducted one star because the packaging arrived with some cosmetic damage to the outer crate, though the gearbox itself was undamaged and well-protected inside. Performance after 180 hours of field work has been flawless. The SAE 80W-90 oil change at 65 hours went smoothly.”<\/p>\n<p><strong>\u0623\u062d\u0645\u062f \u0643\u0627\u064a\u0627\u060c \u0632\u0631\u0627\u0639\u0629 \u0627\u0644\u062d\u0628\u0648\u0628\u060c \u062a\u0631\u0643\u064a\u0627<\/strong><br \/>\n“We operate a 500-hectare mixed farm near Ankara and use two flail mowers for post-harvest stalk shredding on our wheat and sunflower fields. The T-331A replaced our original Comer gearbox that failed after six seasons of use. What impressed us most was the customer service: CMN provided a detailed dimensional drawing so our mechanic could verify the fit before we committed to the order. The gearbox arrived well-packaged and the installation was straightforward. After one full harvesting season, about 220 hours of intensive stalk chopping, the unit runs quietly and the oil seal integrity remains perfect. We plan to replace the gearbox on our second mower with the same model next year.”<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The T-331A flail mower gearbox with a 1:1.94 ratio is a professional-grade power transmission unit engineered to serve as a direct replacement for the Comer T-331A gearbox. This heavy duty flail mower gearbox transforms your tractor’s PTO output into the precise rotational speed and torque your flail rotor demands for consistent, clean vegetation cutting. Manufactured with a cast iron GG25 housing, the T-331A delivers up to 280 HP (205.9 kW) of input power and generates a maximum output torque of 1,820 Nm at 540 RPM. Whether you are maintaining open pastures, clearing dense brush along roadsides, or managing vineyard under-row growth, this tractor flail mower gearbox is built for the task.<\/p>","protected":false},"featured_media":8609,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[334],"product_tag":[326,336,338,339,340,341,342,337],"class_list":{"0":"post-8741","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-flail-mower-gearbox","7":"product_tag-agricultural-gearbox","8":"product_tag-agricultural-gearbox-for-flail-mower","9":"product_tag-flail-mower-gearbox","10":"product_tag-flail-mower-gearbox-for-sale","11":"product_tag-flail-mower-gearbox-manufacturers","12":"product_tag-flail-mower-gearbox-price","13":"product_tag-flail-mower-gearbox-suppliers","14":"product_tag-gearbox-for-flail-mower","16":"first","17":"instock","18":"shipping-taxable","19":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/product\/8741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/comments?post=8741"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/media\/8609"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/media?parent=8741"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/product_brand?post=8741"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/product_cat?post=8741"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/ar\/wp-json\/wp\/v2\/product_tag?post=8741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}