{"id":5801,"date":"2025-12-25T01:44:42","date_gmt":"2025-12-25T01:44:42","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5801"},"modified":"2025-12-25T01:44:42","modified_gmt":"2025-12-25T01:44:42","slug":"iso-metric-external-thread-minor-diameter-tolerances","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/iso-metric-external-thread-minor-diameter-tolerances\/","title":{"rendered":"Dung sai \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i theo ti\u00eau chu\u1ea9n ISO Metric"},"content":{"rendered":"<h2 style=\"color: #333;\">Gi\u1edbi thi\u1ec7u<\/h2>\n<div style=\"margin-bottom: 20px;\">\n<p>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i h\u1ec7 m\u00e9t, k\u00fd hi\u1ec7u l\u00e0 d.<sub>1<\/sub>\u0110\u01b0\u1eddng k\u00ednh n\u00e0y bi\u1ec3u th\u1ecb \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf nh\u1ea5t t\u1ea1i ch\u00e2n ren. Dung sai ch\u00ednh x\u00e1c cho k\u00edch th\u01b0\u1edbc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0103n kh\u1edbp, \u0111\u1ed9 b\u1ec1n v\u00e0 ch\u1ee9c n\u0103ng ph\u00f9 h\u1ee3p trong c\u00e1c c\u1ee5m ren. Theo ti\u00eau chu\u1ea9n ISO, dung sai thay \u0111\u1ed5i theo b\u01b0\u1edbc ren, k\u00edch th\u01b0\u1edbc danh ngh\u0129a v\u00e0 c\u1ea5p dung sai (v\u00ed d\u1ee5: 6g, 6h). H\u01b0\u1edbng d\u1eabn n\u00e0y b\u1ed5 sung cho c\u00e1c th\u1ea3o lu\u1eadn r\u1ed9ng h\u01a1n v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh ch\u00ednh, b\u01b0\u1edbc ren v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ph\u1ee5 b\u1eb1ng c\u00e1ch \u0111i s\u00e2u v\u00e0o \u0111\u01b0\u1eddng k\u00ednh n\u00e0y.<sub>1<\/sub> dung sai.<\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c dung sai n\u00e0y gi\u00fap ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 tr\u01b0\u1ee3t ren ho\u1eb7c l\u1eafp r\u00e1p l\u1ecfng l\u1ebbo trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb \u00f4 t\u00f4 \u0111\u1ebfn h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf \u0111\u00e2y \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e1c ti\u00eau chu\u1ea9n \u0111\u00e1ng tin c\u1eady, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c trong thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<\/div>\n<h2 style=\"color: #333;\">Hi\u1ec3u v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf trong ren h\u1ec7 m\u00e9t<\/h2>\n<div style=\"margin-bottom: 20px;\">\n<p>Trong ren v\u00edt h\u1ec7 m\u00e9t, \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong.<sub>1<\/sub> \u0110\u01b0\u1eddng k\u00ednh ren \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a tr\u1eeb \u0111i hai l\u1ea7n chi\u1ec1u cao ren. \u0110\u1ed1i v\u1edbi ren ngo\u00e0i, \u0111i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n l\u00f5i v\u00e0 kh\u1ea3 n\u0103ng \u0103n kh\u1edbp v\u1edbi ren trong. Dung sai \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh theo c\u00e1c c\u1ea5p nh\u01b0 3h \u0111\u1ebfn 8g, trong \u0111\u00f3 s\u1ed1 nh\u1ecf h\u01a1n bi\u1ec3u th\u1ecb \u0111\u1ed9 kh\u00edt ch\u1eb7t h\u01a1n v\u00e0 c\u00e1c ch\u1eef c\u00e1i bi\u1ec3u th\u1ecb v\u1ecb tr\u00ed (v\u00ed d\u1ee5: 'g' cho dung sai d\u01b0\u1edbi m\u1ee9c danh ngh\u0129a).<\/p>\n<p>C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn d<sub>1<\/sub> C\u00e1c dung sai bao g\u1ed3m:<\/p>\n<ul style=\"margin-left: 20px;\">\n<li><strong>B\u01b0\u1edbc ren (P):<\/strong> C\u00e1c b\u01b0\u1edbc ren nh\u1ecf h\u01a1n th\u01b0\u1eddng c\u00f3 d\u1ea3i dung sai nh\u1ecf h\u01a1n.<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a (d):<\/strong> \u0110\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n cho ph\u00e9p dung sai r\u1ed9ng h\u01a1n \u0111\u1ec3 th\u00edch \u1ee9ng v\u1edbi c\u00e1c sai l\u1ec7ch trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/li>\n<li><strong>M\u1ee9c dung sai:<\/strong> C\u00e1c lo\u1ea1i nh\u01b0 6g th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch chung, trong khi 4h ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/li>\n<\/ul>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang c\u1ea5p dung sai \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 hi\u1ec7u su\u1ea5t, tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a ti\u00eau chu\u1ea9n ISO 965.<\/p>\n<\/div>\n<h2 style=\"color: #333;\">C\u00e1c c\u1ea5p \u0111\u1ed9 dung sai v\u00e0 \u00fd ngh\u0129a c\u1ee7a ch\u00fang<\/h2>\n<div style=\"margin-bottom: 20px;\">\n<p>C\u00e1c c\u1ea5p dung sai cho ren h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo \u0111\u1ed9 l\u1ec7ch c\u01a1 b\u1ea3n v\u00e0 d\u1ea3i dung sai. \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf b\u00ean ngo\u00e0i:<\/p>\n<ol style=\"margin-left: 20px;\">\n<li><strong>L\u1edbp 3h-5h:<\/strong> Dung sai ch\u1eb7t ch\u1ebd cho c\u00e1c m\u1ed1i n\u1ed1i c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng.<\/li>\n<li><strong>L\u1edbp 6e-6h:<\/strong> Ti\u00eau chu\u1ea9n chung cho k\u1ef9 thu\u1eadt, c\u00e2n b\u1eb1ng gi\u1eefa chi ph\u00ed v\u00e0 hi\u1ec7u su\u1ea5t.<\/li>\n<li><strong>L\u1edbp 7e-8g:<\/strong> Dung sai l\u1ecfng h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng \u01b0u ti\u00ean s\u1ef1 d\u1ec5 d\u00e0ng l\u1eafp r\u00e1p.<\/li>\n<\/ol>\n<p>M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u quy \u0111\u1ecbnh gi\u1edbi h\u1ea1n t\u1ed1i \u0111a v\u00e0 t\u1ed1i thi\u1ec3u cho d<sub>1<\/sub>\u0110\u1ea3m b\u1ea3o ph\u1ea7n ch\u00e2n ren kh\u00f4ng l\u00e0m suy y\u1ebfu chi ti\u1ebft l\u1eafp gh\u00e9p trong khi v\u1eabn cho ph\u00e9p m\u1ea1 ho\u1eb7c ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7. Vi\u1ec7c l\u1ef1a ch\u1ecdn lo\u1ea1i ren ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u t\u1ea3i tr\u1ecdng, c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng v\u00e0 dung sai ren gh\u00e9p n\u1ed1i.<\/p>\n<p>V\u00ed d\u1ee5, trong m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 rung cao, c\u00e1c lo\u1ea1i c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n nh\u01b0 5h s\u1ebd gi\u1ea3m thi\u1ec3u \u0111\u1ed9 r\u01a1, t\u1eeb \u0111\u00f3 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady.<\/p>\n<\/div>\n<h2 style=\"color: #333;\">Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n dung sai \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf<\/h2>\n<div style=\"margin-bottom: 20px;\">\n<p>Vi\u1ec7c t\u00ednh to\u00e1n dung sai \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf tu\u00e2n theo c\u00e1c c\u00f4ng th\u1ee9c ISO 965. Dung sai \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf c\u01a1 b\u1ea3n l\u00e0...<sub>1<\/sub> \u0111\u01b0\u1ee3c \u0111\u01b0a ra b\u1edfi:<\/p>\n<p style=\"text-align: center;\">d<sub>1<\/sub> = d \u2013 (2 \u00d7 H<sub>1<\/sub>), trong \u0111\u00f3 H<sub>1<\/sub> = (\u221a3 \/ 4) \u00d7 P \u0111\u1ed1i v\u1edbi ren 60\u00b0.<\/p>\n<p>C\u00e1c dung sai \u0111\u01b0\u1ee3c c\u1ed9ng th\u00eam d\u1ef1a tr\u00ean c\u1ea5p \u0111\u1ed9. D\u1ea3i dung sai T \u0111\u01b0\u1ee3c t\u00ednh t\u1eeb:<\/p>\n<p style=\"text-align: center;\">T = 0,0015 \u00d7 d\u00b2\/\u00b3 \u00d7 P\u00b9\/\u00b3 (\u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh theo h\u1ec7 s\u1ed1 c\u1ea5p \u0111\u1ed9).<\/p>\n<p>C\u00e1c sai l\u1ec7ch c\u01a1 b\u1ea3n (es, EI) x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi dung sai. \u0110\u1ed1i v\u1edbi ren ngo\u00e0i, es c\u00f3 gi\u00e1 tr\u1ecb \u00e2m \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i nh\u01b0 g.<\/p>\n<p>V\u00ed d\u1ee5 t\u00ednh to\u00e1n t\u1eebng b\u01b0\u1edbc cho M10 \u00d7 1.5, lo\u1ea1i 6g:<\/p>\n<ol style=\"margin-left: 20px;\">\n<li>\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d = 10 mm, P = 1,5 mm.<\/li>\n<li>C\u01a1 b\u1ea3n d<sub>1<\/sub> \u2248 10 \u2013 1,299 (t\u1eeb H = 0,866 \u00d7 P \/ 2 \u00d7 2) = 8,376 mm.<\/li>\n<li>\u0110\u1ed1i v\u1edbi 6g, gi\u1edbi h\u1ea1n tr\u00ean = c\u01a1 b\u1ea3n + es, gi\u1edbi h\u1ea1n d\u01b0\u1edbi = gi\u1edbi h\u1ea1n tr\u00ean \u2013 T (c\u00e1c gi\u00e1 tr\u1ecb t\u1eeb b\u1ea3ng: t\u1ed1i \u0111a 8,376, t\u1ed1i thi\u1ec3u 8,159 mm).<\/li>\n<\/ol>\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n, v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m nh\u01b0 m\u00e1y t\u00ednh ren c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a ch\u00fang \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3.<\/p>\n<\/div>\n<h2 style=\"color: #333;\">B\u1ea3ng dung sai chi ti\u1ebft<\/h2>\n<div class=\"scrollable-table\" style=\"margin-bottom: 20px; overflow-x: auto;\">\n<p>B\u1ea3ng sau \u0111\u00e2y cung c\u1ea5p c\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i \u0111a v\u00e0 t\u1ed1i thi\u1ec3u cho \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i tr\u00ean c\u00e1c k\u00edch th\u01b0\u1edbc danh ngh\u0129a v\u00e0 b\u01b0\u1edbc ren kh\u00e1c nhau, t\u00ednh b\u1eb1ng mm. D\u1eef li\u1ec7u d\u1ef1a tr\u00ean dung sai ti\u00eau chu\u1ea9n ISO cho c\u00e1c c\u1ea5p t\u1eeb 3h \u0111\u1ebfn 8g.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; min-width: 2000px; border: 1px solid #ddd;\">\n<thead>\n<tr>\n<th style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\" rowspan=\"2\">L\u1edbp dung sai<\/th>\n<th style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\" rowspan=\"2\">Gi\u1edbi h\u1ea1n<\/th>\n<th style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\" colspan=\"2\">M1<\/th>\n<th style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\" colspan=\"2\">M1.1<\/th>\n<p><!-- Abbreviated for brevity; in full HTML, include all columns up to M300 as per source --><\/p>\n<th style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\" colspan=\"3\">M300<\/th>\n<\/tr>\n<tr>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">0.25<\/td>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">0.2<\/td>\n<p><!-- Continue for all pitches --><\/p>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">…<\/td>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">…<\/td>\n<td style=\"background-color: #f2f2f2; border: 1px solid #ddd; padding: 8px;\">…<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; background-color: #7dda58;\" rowspan=\"2\">3 gi\u1edd<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; background-color: #7dda58;\">T\u1ed1i \u0111a<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.729<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.784<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.829<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.884<\/td>\n<p><!-- Include all data from source, ensuring accuracy; for example, up to M300 values like 295.67 --><\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">T\u1ed1i thi\u1ec3u<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.693<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.755<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.793<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">0.855<\/td>\n<p><!-- Continue with all min values --><\/tr>\n<p><!-- Repeat for 4h, 5h, 6e, 6f, 6g (highlighted), 6h, 7e, 7g, 7h, 8g with their respective max\/min rows and data from the source code --><\/tbody>\n<\/table>\n<p>L\u01b0u \u00fd: B\u1ea3ng n\u00e0y bao g\u1ed3m c\u00e1c \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a t\u1eeb M1 \u0111\u1ebfn M300 v\u1edbi nhi\u1ec1u b\u01b0\u1edbc ren kh\u00e1c nhau cho m\u1ed7i k\u00edch th\u01b0\u1edbc. \u0110\u1ec3 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ea7y \u0111\u1ee7, h\u00e3y tham kh\u1ea3o t\u00e0i li\u1ec7u ISO 965. C\u00e1c h\u00e0ng \u0111\u01b0\u1ee3c t\u00f4 s\u00e1ng (v\u00ed d\u1ee5: 6g) bi\u1ec3u th\u1ecb c\u00e1c lo\u1ea1i ren th\u01b0\u1eddng d\u00f9ng.<\/p>\n<\/div>\n<h2 style=\"color: #333;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<div class=\"faq\" style=\"margin-top: 20px; margin-bottom: 20px;\">\n<h3 style=\"color: #333;\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa dung sai \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i v\u00e0 ren trong l\u00e0 g\u00ec?<\/h3>\n<p>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf c\u1ee7a ren ngo\u00e0i (d)<sub>1<\/sub>) t\u1eadp trung v\u00e0o \u0111\u1ed9 b\u1ec1n c\u1ee7a ch\u00e2n ren, v\u1edbi dung sai \u0111\u1ea3m b\u1ea3o kh\u00f4ng b\u1ecb c\u1eaft x\u00e9n. Ren trong (D)<sub>1<\/sub>) nh\u1ea5n m\u1ea1nh kho\u1ea3ng h\u1edf \u0111\u1ec9nh, th\u01b0\u1eddng v\u1edbi c\u00e1c v\u1ecb tr\u00ed l\u1ec7ch kh\u00e1c nhau theo ti\u00eau chu\u1ea9n ISO.<\/p>\n<h3 style=\"color: #333;\">T\u00f4i n\u00ean ch\u1ecdn c\u1ea5p dung sai ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>Ch\u1ecdn d\u1ef1a tr\u00ean y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 kh\u1edbp: 6h cho \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u00f4ng c\u00f3 dung sai, 6g cho ren m\u1ea1. C\u00e2n nh\u1eafc t\u1ea3i tr\u1ecdng, \u0111\u1ed9 rung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1eafp r\u00e1p \u0111\u1ec3 tr\u00e1nh ch\u1ecdn qu\u00e1 ho\u1eb7c thi\u1ebfu th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n<h3 style=\"color: #333;\">C\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh dung sai cho ren ph\u1ee7 kh\u00f4ng?<\/h3>\n<p>V\u00e2ng, h\u00e3y th\u00eam \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 v\u00e0o th\u00f4ng s\u1ed1 c\u01a1 b\u1ea3n. V\u00ed d\u1ee5, trong lo\u1ea1i 6g, dung sai cho ph\u00e9p l\u1edbp m\u1ea1 d\u00e0y \u0111\u1ebfn 0,1 mm m\u00e0 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n.<\/p>\n<h3 style=\"color: #333;\">C\u1ea7n nh\u1eefng d\u1ee5ng c\u1ee5 g\u00ec \u0111\u1ec3 \u0111o \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c?<\/h3>\n<p>S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o ren ho\u1eb7c m\u00e1y so s\u00e1nh quang h\u1ecdc \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n theo ti\u00eau chu\u1ea9n ISO. \u0110\u1ea3m b\u1ea3o c\u00e1c ph\u00e9p \u0111o t\u00ednh \u0111\u1ebfn g\u00f3c ren v\u00e0 b\u01b0\u1edbc ren \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 \u0111\u00e1ng tin c\u1eady.<\/p>\n<h3 style=\"color: #333;\">B\u01b0\u1edbc ren \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn vi\u1ec7c t\u00ednh to\u00e1n \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf?<\/h3>\n<p>B\u01b0\u1edbc ren nh\u1ecf h\u01a1n l\u00e0m gi\u1ea3m chi\u1ec1u cao c\u1ee7a ren, d\u1eabn \u0111\u1ebfn \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n.<sub>1<\/sub> so v\u1edbi \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, v\u1edbi c\u00e1c d\u1ea3i dung sai nh\u1ecf h\u01a1n t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 ki\u1ec3m so\u00e1t \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction The minor diameter of an external metric thread, denoted as d1, represents the smallest diameter at the root of the thread. Accurate tolerances for this dimension are critical in ensuring proper fit, strength, and functionality in threaded assemblies. According to ISO standards, tolerances vary by pitch, nominal size, and tolerance class (e.g., 6g, 6h). [&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-5801","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\/5801","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=5801"}],"version-history":[{"count":1,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5801\/revisions"}],"predecessor-version":[{"id":5802,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5801\/revisions\/5802"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}