{"id":5769,"date":"2025-12-25T00:44:53","date_gmt":"2025-12-25T00:44:53","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5769"},"modified":"2025-12-25T00:44:53","modified_gmt":"2025-12-25T00:44:53","slug":"thread-tensile-stress-area-chart-metric-inch","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/thread-tensile-stress-area-chart-metric-inch\/","title":{"rendered":"B\u1ea3ng di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o c\u1ee7a ren: H\u1ec7 m\u00e9t v\u00e0 h\u1ec7 inch"},"content":{"rendered":"<div style=\"max-width: 1200px; margin: 0 auto; padding: 20px; font-family: Arial, sans-serif; line-height: 1.6; color: #333;\">\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">Gi\u1edbi thi\u1ec7u v\u1ec1 c\u00e1c v\u00f9ng \u1ee9ng su\u1ea5t k\u00e9o c\u1ee7a ren<\/h2>\n<p style=\"margin-bottom: 15px;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o c\u1ee7a ren, th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0 As, th\u1ec3 hi\u1ec7n di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang hi\u1ec7u qu\u1ea3 ch\u1ecbu t\u1ea3i tr\u1ecdng k\u00e9o trong c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p c\u00f3 ren. Th\u00f4ng s\u1ed1 n\u00e0y r\u1ea5t quan tr\u1ecdng trong thi\u1ebft k\u1ebf c\u01a1 kh\u00ed \u0111\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 c\u00e1c chi ti\u1ebft c\u00f3 ren kh\u00e1c. N\u00f3 t\u00ednh \u0111\u1ebfn h\u00ecnh d\u1ea1ng h\u00ecnh h\u1ecdc c\u1ee7a ren v\u00e0 \u0111\u01b0\u1ee3c suy ra t\u1eeb c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp nh\u01b0 GB\/T 16823.1-1997 cho ren h\u1ec7 m\u00e9t v\u00e0 ASME B1.1 cho ren h\u1ec7 inch th\u1ed1ng nh\u1ea5t.<\/p>\n<p style=\"margin-bottom: 15px;\">Trong c\u00e1c \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt, vi\u1ec7c n\u1eafm r\u00f5 ch\u00ednh x\u00e1c v\u00f9ng ch\u1ecbu l\u1ef1c \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3, ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng do t\u1ea3i tr\u1ecdng d\u1ecdc tr\u1ee5c. Bi\u1ec3u \u0111\u1ed3 n\u00e0y cung c\u1ea5p d\u1eef li\u1ec7u to\u00e0n di\u1ec7n cho c\u1ea3 ren h\u1ec7 m\u00e9t (ISO) v\u00e0 h\u1ec7 inch (Unified), bao g\u1ed3m nhi\u1ec1u b\u01b0\u1edbc ren v\u00e0 s\u1ed1 ren kh\u00e1c nhau. H\u00e3y s\u1eed d\u1ee5ng ngu\u1ed3n t\u00e0i li\u1ec7u n\u00e0y \u0111\u1ec3 ph\u00e2n t\u00edch k\u1ebft c\u1ea5u, l\u1ef1a ch\u1ecdn \u1ed1c v\u00edt v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf.<\/p>\n<ul style=\"list-style-type: disc; margin-left: 20px; margin-bottom: 15px;\">\n<li>Ren h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1eb1ng milim\u00e9t, bao g\u1ed3m c\u00e1c k\u00edch th\u01b0\u1edbc t\u1eeb M1 \u0111\u1ebfn M70.<\/li>\n<li>C\u00e1c lo\u1ea1i ren h\u1ec7 inch bao g\u1ed3m UNC (th\u00f4) v\u00e0 UNF (m\u1ecbn), t\u1eeb #1 \u0111\u1ebfn 3-3\/4 inch.<\/li>\n<li>T\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ec1u \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ed1i chi\u1ebfu v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady.<\/li>\n<\/ul>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">B\u1ea3ng di\u1ec7n t\u00edch \u1ee9ng su\u1ea5t k\u00e9o ren h\u1ec7 m\u00e9t (\u0110\u01a1n v\u1ecb: mm)<\/h2>\n<p style=\"margin-bottom: 15px;\">B\u1ea3ng sau li\u1ec7t k\u00ea \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, b\u01b0\u1edbc ren (P) v\u00e0 di\u1ec7n t\u00edch ch\u1ecbu l\u1ef1c k\u00e9o (As t\u00ednh b\u1eb1ng mm\u00b2) cho c\u00e1c lo\u1ea1i ren h\u1ec7 m\u00e9t. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb ti\u00eau chu\u1ea9n GB\/T 16823.1-1997, quy \u0111\u1ecbnh v\u1ec1 di\u1ec7n t\u00edch ch\u1ecbu l\u1ef1c v\u00e0 di\u1ec7n t\u00edch ch\u1ecbu t\u1ea3i cho c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p c\u00f3 ren. L\u01b0u \u00fd r\u1eb1ng \u0111\u1ed1i v\u1edbi m\u1ed7i \u0111\u01b0\u1eddng k\u00ednh, nhi\u1ec1u b\u01b0\u1edbc ren \u0111\u01b0\u1ee3c cung c\u1ea5p n\u1ebfu c\u00f3 th\u1ec3, ph\u1ea3n \u00e1nh c\u00e1c t\u00f9y ch\u1ecdn ren th\u00f4 v\u00e0 ren m\u1ecbn.<\/p>\n<div style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 600px; font-size: 14px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Ch\u1ee7 \u0111\u1ec1<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">B\u01b0\u1edbc ren P (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t (mm\u00b2)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Ch\u1ee7 \u0111\u1ec1<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">B\u01b0\u1edbc ren P (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t (mm\u00b2)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Ch\u1ee7 \u0111\u1ec1<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">B\u01b0\u1edbc ren P (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t (mm\u00b2)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.46<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">84.27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">914.54<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.52<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">88.13<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">939.85<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.59<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">92.07<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">975.76<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.65<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">96.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1028.39<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.73<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">115.44<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1082.41<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">124.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1109.94<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.98<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">134<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1120.92<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">156.67<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1148.93<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.35<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">167.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1205.98<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.57<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">178.17<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1264.42<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.35<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">192.47<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1306.01<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M1.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.04<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">204.18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1336.23<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.07<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">216.24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1397.71<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">228.63<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1460.57<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">244.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1473.16<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.03<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">257.98<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1537.67<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">271.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1603.57<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.35<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">285.38<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1670.85<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5.03<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">303.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M52<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1757.84<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.35<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5.61<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">318.06<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M52<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1828.25<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6.78<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">333.06<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M52<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1900.05<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.35<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">348.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M52<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1973.22<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">8.78<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">352.51<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M70<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3254.39<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">9.79<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">384.42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M70<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3446.88<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">11.32<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">400.89<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M70<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3545.2<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12.76<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">417.71<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M70<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3644.9<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">14.18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">459.41<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M70<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3695.27<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">16.12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">495.74<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">20.12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">514.43<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">22.03<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">533.46<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">28.86<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">560.59<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">31.14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">621.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">36.61<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">642.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">39.17<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">663.34<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">41.81<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M33<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">693.56<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">57.99<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M33<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">760.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">61.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M33<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">783.91<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">64.49<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">816.73<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">67.88<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">M36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">864.94<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n ren h\u1ec7 m\u00e9t<\/h2>\n<p style=\"margin-bottom: 15px;\">Di\u1ec7n t\u00edch ch\u1ecbu k\u00e9o c\u1ee7a ren h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n<p style=\"margin-bottom: 15px; font-style: italic;\">Nh\u01b0 = (\u03c0 \/ 4) \u00d7 [(d\u2082 + d\u2083) \/ 2]\u00b2<\/p>\n<p style=\"margin-bottom: 15px;\">\u1ede \u0111\u00e2u:<\/p>\n<ul style=\"list-style-type: disc; margin-left: 20px; margin-bottom: 15px;\">\n<li>d\u2082: \u0110\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren c\u01a1 b\u1ea3n c\u1ee7a ren ngo\u00e0i (theo ti\u00eau chu\u1ea9n GB\/T 196).<\/li>\n<li>d\u2083: \u0110\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i, \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c d\u2083 = d\u2081 \u2013 H\/6.<\/li>\n<li>d\u2081: \u0110\u01b0\u1eddng k\u00ednh nh\u1ecf c\u01a1 b\u1ea3n c\u1ee7a ren ngo\u00e0i (theo GB\/T 196).<\/li>\n<li>H: Chi\u1ec1u cao tam gi\u00e1c c\u01a1 b\u1ea3n (theo GB\/T 192).<\/li>\n<\/ul>\n<p style=\"margin-bottom: 15px;\">C\u00f4ng th\u1ee9c n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e1n ch\u00ednh x\u00e1c cho c\u00e1c lo\u1ea1i ren t\u00f9y ch\u1ec9nh ho\u1eb7c kh\u00f4ng ti\u00eau chu\u1ea9n, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n ISO 898-1 v\u1ec1 \u0111\u1ed9 b\u1ec1n c\u1ee7a \u1ed1c v\u00edt.<\/p>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">B\u1ea3ng di\u1ec7n t\u00edch \u1ee9ng su\u1ea5t k\u00e9o ren inch (\u0110\u01a1n v\u1ecb: inch)<\/h2>\n<p style=\"margin-bottom: 15px;\">B\u1ea3ng n\u00e0y cung c\u1ea5p d\u1eef li\u1ec7u cho ren h\u1ec7 inch th\u1ed1ng nh\u1ea5t, bao g\u1ed3m \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a (d), k\u00edch th\u01b0\u1edbc t\u00ednh b\u1eb1ng inch, s\u1ed1 ren tr\u00ean m\u1ed7i inch (n) v\u00e0 di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o (As t\u00ednh b\u1eb1ng in\u00b2). B\u1ea3ng n\u00e0y bao g\u1ed3m c\u1ea3 hai d\u00f2ng ren UNC (th\u00f4) v\u00e0 UNF (m\u1ecbn), d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n ASME B1.1.<\/p>\n<div style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 600px; font-size: 14px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">K\u00edch th\u01b0\u1edbc (inch)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Lu\u1ed3ng\/n<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t (in\u00b2)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">K\u00edch th\u01b0\u1edbc (inch)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Lu\u1ed3ng\/n<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t (in\u00b2)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.073<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">64<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00262<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.073<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">72<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00278<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.086<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">56<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.0037<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.086<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">64<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00393<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.099<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00486<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.099<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">56<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00523<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.112<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">40<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00603<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.112<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">48<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.0066<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">40<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00796<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">44<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00831<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.138<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">32<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.00909<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.138<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">40<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.01014<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">8#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.164<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">32<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.01401<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">8#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.164<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.01473<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.1875<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.01695<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.1875<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">32<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.01937<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.216<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.02416<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12#<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.216<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">28<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.02579<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.03182<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">28<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.03637<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.3125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.05243<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.3125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.05807<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.07749<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.08783<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.4375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.10631<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.4375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.11872<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">13<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.1419<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.15995<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">9\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5625<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.18194<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">9\/16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.5625<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.20298<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.625<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">11<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.226<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.625<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.25596<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.33446<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.37296<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.875<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.46173<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.875<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.50947<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.60575<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.66304<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.76328<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.85572<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.96911<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.07295<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-3\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.15488<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-3\/8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.375<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.31471<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.40525<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.58102<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1-3\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">1.89946<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.49823<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2-1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.24769<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2-1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.99883<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2-3\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">2.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.93401<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5.96737<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3-1\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">7.09891<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3-1\/2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">8.32862<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3-3\/4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">3.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">9.65651<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n ren inch<\/h2>\n<p style=\"margin-bottom: 15px;\">Di\u1ec7n t\u00edch ch\u1ecbu k\u00e9o c\u1ee7a ren h\u1ec7 inch th\u1ed1ng nh\u1ea5t \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau:<\/p>\n<p style=\"margin-bottom: 15px; font-style: italic;\">Nh\u01b0 = 0,7854 \u00d7 [d \u2013 (0,9743 \/ n)]\u00b2<\/p>\n<p style=\"margin-bottom: 15px;\">\u1ede \u0111\u00e2u:<\/p>\n<ul style=\"list-style-type: disc; margin-left: 20px; margin-bottom: 15px;\">\n<li>d: \u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a t\u00ednh b\u1eb1ng inch.<\/li>\n<li>n: S\u1ed1 s\u1ee3i tr\u00ean m\u1ed7i inch.<\/li>\n<\/ul>\n<p style=\"margin-bottom: 15px;\">Ph\u00e9p x\u1ea5p x\u1ec9 n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u01b0\u1eddng k\u00ednh hi\u1ec7u d\u1ee5ng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ti\u00eau chu\u1ea9n ASME v\u00e0 SAE \u0111\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9 b\u1ec1n c\u1ee7a bu l\u00f4ng.<\/p>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">\u1ee8ng d\u1ee5ng v\u00e0 t\u1ea7m quan tr\u1ecdng trong thi\u1ebft k\u1ebf c\u01a1 kh\u00ed<\/h2>\n<p style=\"margin-bottom: 15px;\">V\u00f9ng \u1ee9ng su\u1ea5t k\u00e9o r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ea3i tr\u1ecdng k\u00e9o cho ph\u00e9p c\u1ee7a c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p c\u00f3 ren b\u1eb1ng c\u00f4ng th\u1ee9c: F = As \u00d7 \u03c3, trong \u0111\u00f3 \u03c3 l\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a v\u1eadt li\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap \u00edch trong vi\u1ec7c:<\/p>\n<ol style=\"list-style-type: decimal; margin-left: 20px; margin-bottom: 15px;\">\n<li>L\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc bu l\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ed1i n\u1ed1i k\u1ebft c\u1ea5u trong ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 x\u00e2y d\u1ef1ng.<\/li>\n<li>\u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c h\u1ec7 s\u1ed1 an to\u00e0n trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i tr\u1ecdng cao nh\u01b0 b\u00ecnh ch\u1ecbu \u00e1p l\u1ef1c ho\u1eb7c m\u00e1y m\u00f3c.<\/li>\n<li>T\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf b\u1eb1ng c\u00e1ch so s\u00e1nh ren th\u00f4 v\u00e0 ren m\u1ecbn v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi ho\u1eb7c \u0111\u1ed9 d\u1ec5 l\u1eafp r\u00e1p.<\/li>\n<\/ol>\n<p style=\"margin-bottom: 15px;\">Lu\u00f4n ki\u1ec3m tra k\u1ef9 c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u v\u00e0 chi\u1ec1u d\u00e0i l\u1eafp gh\u00e9p theo c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan \u0111\u1ec3 tr\u00e1nh thi\u1ebft k\u1ebf thi\u1ebfu ho\u1eb7c th\u1eeba.<\/p>\n<h2 style=\"font-size: 24px; font-weight: bold; margin-top: 40px; margin-bottom: 15px; color: #0056b3;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<dl style=\"margin-bottom: 15px;\">\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa v\u00f9ng ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o v\u00e0 v\u00f9ng \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf l\u00e0 g\u00ec?<\/dt>\n<dd style=\"margin-bottom: 15px;\">V\u00f9ng ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o (As) l\u00e0 v\u00f9ng hi\u1ec7u d\u1ee5ng th\u1ec3 hi\u1ec7n h\u00ecnh d\u1ea1ng ch\u00e2n ren, th\u01b0\u1eddng l\u1edbn h\u01a1n v\u00f9ng \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf \u0111\u1ec3 ph\u1ea3n \u00e1nh s\u1ef1 ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng th\u1ef1c t\u1ebf. V\u00f9ng n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c t\u00ednh to\u00e1n \u0111\u1ed9 b\u1ec1n, trong khi v\u00f9ng \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf ch\u1ec9 mang t\u00ednh ch\u1ea5t h\u00ecnh h\u1ecdc thu\u1ea7n t\u00fay.<\/dd>\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">B\u01b0\u1edbc ren \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn v\u00f9ng ch\u1ecbu l\u1ef1c trong ren h\u1ec7 m\u00e9t?<\/dt>\n<dd style=\"margin-bottom: 15px;\">B\u01b0\u1edbc ren nh\u1ecf h\u01a1n d\u1eabn \u0111\u1ebfn di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t l\u1edbn h\u01a1n \u0111\u1ed1i v\u1edbi c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng k\u00ednh v\u00ec ch\u00fang l\u00e0m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh hi\u1ec7u d\u1ee5ng. V\u00ed d\u1ee5, trong ren M12, b\u01b0\u1edbc ren 1 mm cho di\u1ec7n t\u00edch ch\u1ecbu \u1ee9ng su\u1ea5t As = 96,1 mm\u00b2, so v\u1edbi 84,27 mm\u00b2 \u0111\u1ed1i v\u1edbi b\u01b0\u1edbc ren 1,75 mm.<\/dd>\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">C\u00e1c gi\u00e1 tr\u1ecb n\u00e0y c\u00f3 \u00e1p d\u1ee5ng cho c\u1ea3 bu l\u00f4ng v\u00e0 \u1ed1c v\u00edt kh\u00f4ng?<\/dt>\n<dd style=\"margin-bottom: 15px;\">\u0110\u00fang v\u1eady, c\u00e1c v\u00f9ng \u1ee9ng su\u1ea5t n\u00e0y \u00e1p d\u1ee5ng cho ren ngo\u00e0i c\u1ee7a bu l\u00f4ng v\u00e0 v\u00edt theo ti\u00eau chu\u1ea9n GB\/T 16823.1 v\u00e0 ASME B1.1, v\u1edbi gi\u1ea3 \u0111\u1ecbnh d\u1ea1ng ren ti\u00eau chu\u1ea9n. \u0110\u1ed1i v\u1edbi ren trong, v\u00f9ng ch\u1ecbu l\u1ef1c c\u1eaft c\u00f3 th\u1ec3 kh\u00e1c nhau.<\/dd>\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">T\u1ea1i sao n\u00ean d\u00f9ng ch\u1ec9 m\u1ea3nh thay v\u00ec ch\u1ec9 th\u00f4?<\/dt>\n<dd style=\"margin-bottom: 15px;\">Ren m\u1ecbn t\u1ea1o ra c\u00e1c v\u00f9ng ch\u1ecbu l\u1ef1c cao h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi t\u1ed1t h\u01a1n do ch\u00e2n ren n\u00f4ng h\u01a1n, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng d\u1ec5 b\u1ecb rung \u0111\u1ed9ng. Tuy nhi\u00ean, ren th\u00f4 gi\u00fap l\u1eafp r\u00e1p d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 c\u00f3 \u0111\u1ed9 b\u1ec1n c\u1eaft cao h\u01a1n.<\/dd>\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh to\u00e1n di\u1ec7n t\u00edch ch\u1ecbu l\u1ef1c cho c\u00e1c lo\u1ea1i ren kh\u00f4ng ti\u00eau chu\u1ea9n?<\/dt>\n<dd style=\"margin-bottom: 15px;\">S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c cung c\u1ea5p v\u1edbi k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c t\u1eeb ti\u00eau chu\u1ea9n GB\/T 196 ho\u1eb7c ASME B1.1. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c, h\u00e3y \u0111o d\u2082 v\u00e0 d\u2083 ho\u1eb7c tham kh\u1ea3o c\u00e1c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n ISO 898-1.<\/dd>\n<dt style=\"font-weight: bold; margin-bottom: 5px;\">Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i gi\u1eefa h\u1ec7 m\u00e9t v\u00e0 h\u1ec7 inch c\u00f3 \u0111\u01a1n gi\u1ea3n kh\u00f4ng?<\/dt>\n<dd style=\"margin-bottom: 15px;\">Kh\u00f4ng, do h\u00ecnh d\u1ea1ng ren kh\u00e1c nhau. H\u00e3y chuy\u1ec3n \u0111\u1ed5i \u0111\u01a1n v\u1ecb (1 in\u00b2 = 645,16 mm\u00b2), nh\u01b0ng ch\u1ecdn k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u01b0\u01a1ng d\u1ef1a tr\u00ean y\u00eau c\u1ea7u t\u1ea3i tr\u1ecdng, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 kh\u1edbp k\u00edch th\u01b0\u1edbc tr\u1ef1c ti\u1ebfp.<\/dd>\n<\/dl>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction to Thread Tensile Stress Areas The tensile stress area of a thread, often denoted as As, represents the effective cross-sectional area that bears the tensile load in threaded fasteners. This parameter is crucial in mechanical design for calculating the strength and load-bearing capacity of bolts, screws, and other threaded components. It accounts for the [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5769","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5769"}],"version-history":[{"count":1,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5769\/revisions"}],"predecessor-version":[{"id":5770,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5769\/revisions\/5770"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5769"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}