{"id":4878,"date":"2026-06-10T15:09:36","date_gmt":"2026-06-10T15:09:36","guid":{"rendered":"https:\/\/productionscrews.com\/types-of-threads\/"},"modified":"2026-06-10T15:10:02","modified_gmt":"2026-06-10T15:10:02","slug":"types-of-threads","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/types-of-threads\/","title":{"rendered":"C\u00e1c lo\u1ea1i ren: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ti\u00eau chu\u1ea9n ren v\u00edt v\u00e0 bu l\u00f4ng"},"content":{"rendered":"<p class=\"direct-answer\"><strong>C\u00e1c lo\u1ea1i ren \u0111\u01b0\u1ee3c chia th\u00e0nh ba nh\u00f3m ch\u00ednh: h\u1ec7 m\u00e9t (ISO), h\u1ec7 inch (UNC\/UNF), v\u00e0 h\u1ec7 \u1ed1ng (NPT\/BSP), c\u00f9ng v\u1edbi c\u00e1c d\u1ea1ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 ACME v\u00e0 t\u1ef1 t\u1ea1o ren.<\/strong><\/p>\n<p>M\u1ed9t kh\u00e1ch h\u00e0ng t\u1eebng g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t t\u00fai b\u1ed1n m\u01b0\u01a1i con bu l\u00f4ng th\u00e1o ra t\u1eeb m\u1ed9t d\u00e2y chuy\u1ec1n b\u0103ng t\u1ea3i \u0111\u00e3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 h\u1ecfi: \u201cc\u00e1c anh c\u00f3 th\u1ec3 t\u00ecm lo\u1ea1i gi\u1ed1ng nh\u01b0 th\u1ebf n\u00e0y kh\u00f4ng?\u201d M\u1ed9t n\u1eeda l\u00e0 h\u1ec7 m\u00e9t, m\u1ed9t ph\u1ea7n ba l\u00e0 UNC, v\u00e0 m\u1ed9t v\u00e0i c\u00e1i l\u00e0 lo\u1ea1i ren \u1ed1ng Anh l\u1ea1 m\u00e0 kh\u00f4ng ai d\u01b0\u1edbi x\u01b0\u1edfng nh\u1eadn ra ngay t\u1eeb c\u00e1i nh\u00ecn \u0111\u1ea7u ti\u00ean. S\u1ef1 pha tr\u1ed9n nh\u01b0 v\u1eady ph\u1ed5 bi\u1ebfn h\u01a1n b\u1ea1n ngh\u0129, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c hi\u1ec3u c\u00e1c lo\u1ea1i ren kh\u00e1c nhau l\u1ea1i quan tr\u1ecdng. Kh\u00f4ng ph\u1ea3i \u0111\u1ec3 l\u00e0m ki\u1ebfn th\u1ee9c vui, m\u00e0 l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t chi ti\u1ebft l\u1eafp v\u1eeba kh\u00edt v\u00e0 m\u1ed9t chi ti\u1ebft b\u1ecb tu\u1ed9t ren, k\u1eb9t ho\u1eb7c r\u00f2 r\u1ec9 khi ch\u1ecbu \u00e1p l\u1ef1c.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd tr\u00ecnh b\u00e0y c\u00e1c lo\u1ea1i ren ch\u00ednh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong chi ti\u1ebft m\u00e1y v\u00e0 linh ki\u1ec7n: c\u00e1ch \u0111o, v\u1ecb tr\u00ed s\u1eed d\u1ee5ng t\u1eebng lo\u1ea1i, v\u00e0 c\u00e1ch tr\u00e1nh c\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng ph\u00f9 h\u1ee3p g\u00e2y h\u1ecfng h\u00f3c ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng. N\u1ebfu b\u1ea1n ch\u1ec9 nh\u1edb m\u1ed9t \u0111i\u1ec1u v\u1ec1 c\u00e1c lo\u1ea1i ren sau khi \u0111\u1ecdc xong, h\u00e3y nh\u1edb th\u00f3i quen s\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp g\u1ea7n cu\u1ed1i. N\u00f3 gi\u1ea3i quy\u1ebft nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p nh\u1ea7m l\u1eabn h\u01a1n b\u1ea5t k\u1ef3 b\u1ea3ng tra c\u1ee9u n\u00e0o. Ch\u00fang t\u00f4i s\u1ebd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c nh\u00f3m ti\u00eau chu\u1ea9n (h\u1ec7 m\u00e9t, h\u1ec7 th\u1ed1ng th\u1ed1ng nh\u1ea5t v\u00e0 h\u1ec7 \u1ed1ng), c\u00e1c d\u1ea1ng \u0111\u1eb7c bi\u1ec7t d\u00f9ng cho truy\u1ec1n \u0111\u1ed9ng v\u00e0 kim lo\u1ea1i t\u1ea5m, c\u00e1c c\u1ea5p dung sai quy\u1ebft \u0111\u1ecbnh hai chi ti\u1ebft ren c\u00f3 l\u1eafp v\u1eeba nhau kh\u00f4ng, v\u00e0 danh s\u00e1ch ki\u1ec3m tra th\u1ef1c t\u1ebf m\u00e0 ch\u00fang t\u00f4i s\u1eed d\u1ee5ng khi kh\u00e1ch h\u00e0ng kh\u00f4ng ch\u1eafc m\u00ecnh \u0111ang c\u1ea7m g\u00ec. Sau khi \u0111\u1ecdc xong, b\u1ea1n s\u1ebd c\u00f3 th\u1ec3 nh\u00ecn v\u00e0o m\u1ed9t con bu l\u00f4ng, m\u1ed9t m\u0169i taro ho\u1eb7c m\u1ed9t b\u1ea3n v\u1ebd v\u00e0 bi\u1ebft n\u00f3 thu\u1ed9c nh\u00f3m n\u00e0o, c\u0169ng nh\u01b0 bi\u1ebft c\u1ea7n h\u1ecfi g\u00ec tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng m\u1ed9t ngh\u00ecn c\u00e1i.<\/p>\n<h2>Ren v\u00edt l\u00e0 g\u00ec? C\u1ea5u t\u1ea1o v\u00e0 thu\u1eadt ng\u1eef<\/h2>\n<p>Ren v\u00edt l\u00e0 m\u1ed9t g\u1edd xo\u1eafn \u1ed1c qu\u1ea5n quanh m\u1ed9t tr\u1ee5c tr\u00f2n (ren ngo\u00e0i, nh\u01b0 bu l\u00f4ng) ho\u1eb7c \u0111\u01b0\u1ee3c c\u1eaft v\u00e0o trong l\u1ed7 (ren trong, nh\u01b0 \u0111ai \u1ed1c). M\u1ed7i lo\u1ea1i ren \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi m\u1ed9t s\u1ed1 k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n, v\u00e0 khi b\u1ea1n \u0111\u00e3 bi\u1ebft ch\u00fang, vi\u1ec7c so s\u00e1nh c\u00e1c lo\u1ea1i ren kh\u00e1c nhau s\u1ebd kh\u00f4ng c\u00f2n b\u00ed \u1ea9n n\u1eefa. C\u00e1c thu\u1eadt ng\u1eef d\u01b0\u1edbi \u0111\u00e2y \u00e1p d\u1ee5ng cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i ren \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong h\u01b0\u1edbng d\u1eabn n\u00e0y, d\u00f9 b\u1ea1n \u0111ang xem m\u1ed9t con v\u00edt M2 nh\u1ecf hay m\u1ed9t tr\u1ee5c v\u00edt ACME \u0111\u01b0\u1eddng k\u00ednh 2 inch.<\/p>\n<p>C\u00e1c k\u00edch th\u01b0\u1edbc ch\u00ednh bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh Ch\u00ednh<\/strong>: \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t c\u1ee7a ren, \u0111o qua c\u00e1c \u0111\u1ec9nh ren \u0111\u1ed1i v\u1edbi ren ngo\u00e0i ho\u1eb7c \u0111\u00e1y ren \u0111\u1ed1i v\u1edbi ren trong. \u0110\u00e2y l\u00e0 con s\u1ed1 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc danh ngh\u0129a c\u1ee7a bu l\u00f4ng (M8, 1\/4\u2033-20, v.v.)<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/strong>: \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf nh\u1ea5t, \u0111o qua \u0111\u00e1y ren c\u1ee7a ren ngo\u00e0i<\/li>\n<li><strong>B\u01b0\u1edbc Ren<\/strong>: kho\u1ea3ng c\u00e1ch t\u1eeb m\u1ed9t \u0111\u1ec9nh ren \u0111\u1ebfn \u0111\u1ec9nh ren k\u1ebf ti\u1ebfp, t\u00ednh b\u1eb1ng milim\u00e9t \u0111\u1ed1i v\u1edbi ren h\u1ec7 m\u00e9t<\/li>\n<li><strong>S\u1ed1 v\u00f2ng ren tr\u00ean inch (TPI)<\/strong>: \u0111\u01a1n v\u1ecb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a b\u01b0\u1edbc ren trong h\u1ec7 inch; \u0111\u1ebfm s\u1ed1 \u0111\u1ec9nh ren trong m\u1ed9t inch<\/li>\n<li><strong>Ch\u00ec<\/strong>: kho\u1ea3ng c\u00e1ch v\u00edt ti\u1ebfn d\u1ecdc tr\u1ee5c trong m\u1ed9t v\u00f2ng quay \u0111\u1ea7y \u0111\u1ee7 (b\u1eb1ng b\u01b0\u1edbc ren \u0111\u1ed1i v\u1edbi ren m\u1ed9t \u0111\u1ea7u, l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a b\u01b0\u1edbc ren \u0111\u1ed1i v\u1edbi ren nhi\u1ec1u \u0111\u1ea7u)<\/li>\n<li><strong>G\u00f3c ren<\/strong>: g\u00f3c k\u1eb9p gi\u1eefa hai m\u1eb7t nghi\u00eang c\u1ee7a ren; 60\u00b0 \u0111\u1ed1i v\u1edbi ren h\u1ec7 m\u00e9t v\u00e0 h\u1ec7 th\u1ed1ng th\u1ed1ng nh\u1ea5t, 55\u00b0 \u0111\u1ed1i v\u1edbi Whitworth, 29\u00b0 \u0111\u1ed1i v\u1edbi ACME<\/li>\n<\/ul>\n<p>Ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y r\u1eb1ng h\u1ea7u h\u1ebft c\u00e1c khi\u1ebfu n\u1ea1i v\u1ec1 \u201cchi ti\u1ebft sai\u201d \u0111\u1ec1u xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c nh\u1ea7m l\u1eabn ch\u1ec9 hai y\u1ebfu t\u1ed1: b\u01b0\u1edbc ren v\u00e0 s\u1ed1 ren tr\u00ean inch (TPI). M\u1ed9t con bu l\u00f4ng \u0111\u00fang \u0111\u01b0\u1eddng k\u00ednh nh\u01b0ng sai b\u01b0\u1edbc ren v\u1eabn c\u00f3 th\u1ec3 b\u1eaft v\u00e0o b\u1eb1ng tay. Tuy nhi\u00ean, n\u00f3 s\u1ebd kh\u00f4ng si\u1ebft ch\u1eb7t \u0111\u01b0\u1ee3c, v\u00e0 nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng ngh\u0129 chi ti\u1ebft b\u1ecb l\u1ed7i thay v\u00ec b\u1ecb nh\u1ea7m lo\u1ea1i.<\/p>\n<h3>Ren ph\u1ea3i v\u00e0 ren tr\u00e1i<\/h3>\n<p>Ph\u1ea7n l\u1edbn c\u00e1c chi ti\u1ebft li\u00ean k\u1ebft s\u1eed d\u1ee5ng <strong>ren ph\u1ea3i (RH)<\/strong>, t\u1ee9c l\u00e0 si\u1ebft theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 (\u201csi\u1ebft ph\u1ea3i l\u00e0 ch\u1eb7t\u201d). <strong>Ren tr\u00e1i (LH)<\/strong> l\u1ea1i n\u1edbi ra khi xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, v\u00e0 ch\u00fang t\u1ed3n t\u1ea1i v\u00ec m\u1ed9t l\u00fd do c\u01a1 h\u1ecdc c\u1ee5 th\u1ec3: \u0111\u1ec3 ng\u0103n chi ti\u1ebft t\u1ef1 tu\u1ed9t ra khi ch\u1ecbu t\u1ea3i xoay.<\/p>\n<p>B\u1ea1n s\u1ebd th\u1ea5y ren tr\u00e1i \u1edf c\u00e1c v\u1ecb tr\u00ed sau:<\/p>\n<ul>\n<li>B\u00e0n \u0111\u1ea1p b\u00ean tr\u00e1i c\u1ee7a xe \u0111\u1ea1p (\u0111\u1ec3 khi \u0111\u1ea1p kh\u00f4ng b\u1ecb th\u00e1o ra)<\/li>\n<li>M\u1ed9t \u0111\u1ea7u c\u1ee7a t\u0103ng \u0111\u01a1 (\u0111\u1ec3 khi xoay th\u00e2n s\u1ebd k\u00e9o c\u1ea3 hai \u0111\u1ea7u v\u00e0o ho\u1eb7c ra)<\/li>\n<li>M\u1ed9t s\u1ed1 \u0111\u1ea7u n\u1ed1i b\u00ecnh kh\u00ed, n\u01a1i ren tr\u00e1i tr\u00ean c\u00e1c k\u1ebft n\u1ed1i kh\u00ed d\u1ec5 ch\u00e1y gi\u00fap ng\u0103n ng\u1eeba vi\u1ec7c n\u1ed1i nh\u1ea7m v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng oxy<\/li>\n<\/ul>\n<p>C\u00e1c b\u1ed9 ph\u1eadn ren tr\u00e1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng ch\u1eef \u201cLH\u201d d\u1eadp g\u1ea7n ren ho\u1eb7c m\u1ed9t r\u00e3nh c\u1eaft quanh b\u1ed9 ph\u1eadn. \u0110\u00e2y l\u00e0 m\u1ed9t chi ti\u1ebft nh\u1ecf, nh\u01b0ng n\u1ebfu b\u1ecf qua s\u1ebd khi\u1ebfn b\u1ed9 ph\u1eadn c\u00f3 c\u1ea3m gi\u00e1c nh\u01b0 b\u1ecb v\u1eb7n ch\u00e9o ren khi th\u1ef1c ra \u0111ang xoay \u0111\u00fang (nh\u01b0ng sai h\u01b0\u1edbng).<\/p>\n<h3>So s\u00e1nh c\u00e1c lo\u1ea1i ren trong nh\u00e1y m\u1eaft<\/h3>\n<table>\n<thead>\n<tr>\n<th>D\u00f2ng ren<\/th>\n<th>G\u00f3c<\/th>\n<th>\u0110o b\u1eb1ng<\/th>\n<th>K\u00fd hi\u1ec7u th\u00f4ng d\u1ee5ng<\/th>\n<th>Khu v\u1ef1c ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ti\u00eau chu\u1ea9n ISO Metric<\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>B\u01b0\u1edbc (mm)<\/td>\n<td>M8 x 1.25<\/td>\n<td>To\u00e0n c\u1ea7u \/ EU \/ Ch\u00e2u \u00c1<\/td>\n<\/tr>\n<tr>\n<td>Ren th\u1ed1ng nh\u1ea5t (UNC\/UNF)<\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>TPI<\/td>\n<td>1\/4\u2033-20 UNC<\/td>\n<td>Vi\u1ec7t Nam<\/td>\n<\/tr>\n<tr>\n<td>Whitworth (BSW\/BSF)<\/td>\n<td>55\u00b0<\/td>\n<td>TPI<\/td>\n<td>1\/4\u2033 BSW<\/td>\n<td>Vi\u1ec7t Nam, m\u00e1y m\u00f3c c\u0169<\/td>\n<\/tr>\n<tr>\n<td>Ren \u1ed1ng (NPT\/BSP)<\/td>\n<td>60\u00b0 \/ 55\u00b0<\/td>\n<td>TPI<\/td>\n<td>1\/2\u2033 NPT<\/td>\n<td>\u1ed0ng n\u01b0\u1edbc, kh\u00ed n\u00e9n<\/td>\n<\/tr>\n<tr>\n<td>ACME \/ H\u00ecnh thang<\/td>\n<td>29\u00b0 \/ 30\u00b0<\/td>\n<td>TPI \/ B\u01b0\u1edbc ren<\/td>\n<td>1\/2\u2033-10 ACME<\/td>\n<td>Tr\u1ee5c v\u00edt me, \u00ea-t\u00f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c H\u1ecd Ti\u00eau Chu\u1ea9n Ren: Ren h\u1ec7 M\u00e9t, Ren Th\u1ed1ng Nh\u1ea5t v\u00e0 Ren \u1ed0ng<\/h2>\n<p>H\u1ea7u nh\u01b0 m\u1ecdi lo\u1ea1i ch\u1ed1t b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ec1u thu\u1ed9c m\u1ed9t trong ba h\u1ecd ti\u00eau chu\u1ea9n h\u00f3a, v\u00e0 c\u00e1c lo\u1ea1i ren trong m\u1ed7i h\u1ecd tu\u00e2n theo quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean d\u1ec5 \u0111o\u00e1n khi b\u1ea1n bi\u1ebft m\u1eabu. Ba h\u1ecd n\u00e0y (h\u1ec7 m\u00e9t, th\u1ed1ng nh\u1ea5t v\u00e0 \u1ed1ng) chi\u1ebfm ph\u1ea7n l\u1edbn c\u00e1c lo\u1ea1i ren v\u00edt b\u1ea1n s\u1ebd g\u1eb7p trong s\u1ea3n xu\u1ea5t chung, \u00f4 t\u00f4 v\u00e0 c\u00f4ng tr\u00ecnh h\u1ea1 t\u1ea7ng.<\/p>\n<h3>Ren h\u1ec7 M\u00e9t ISO (M v\u00e0 MF)<\/h3>\n<p><strong>Ren m\u00e9t<\/strong> \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u b\u1eb1ng ch\u1eef \u201cM\u201d theo sau l\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn t\u00ednh b\u1eb1ng milim\u00e9t v\u00e0, t\u00f9y ch\u1ecdn, l\u00e0 b\u01b0\u1edbc ren, v\u00ed d\u1ee5 <strong>M10 x 1.5<\/strong>. N\u1ebfu kh\u00f4ng ghi b\u01b0\u1edbc ren, m\u1eb7c \u0111\u1ecbnh l\u00e0 <strong>b\u01b0\u1edbc ren th\u00f4<\/strong>, \u0111\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh cho c\u00e1c m\u1ed1i gh\u00e9p th\u00f4ng d\u1ee5ng.<\/p>\n<p>C\u00f3 hai d\u00f2ng ren h\u1ec7 m\u00e9t:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc ren th\u00f4 (M)<\/strong>: m\u1eb7c \u0111\u1ecbnh cho h\u1ea7u h\u1ebft bu l\u00f4ng, \u0111ai \u1ed1c v\u00e0 v\u00edt m\u00e1y. D\u1ec5 l\u1eafp r\u00e1p h\u01a1n, ch\u1ecbu \u0111\u01b0\u1ee3c h\u01b0 h\u1ea1i nh\u1ecf \u1edf ren v\u00e0 l\u00e0 l\u1ef1a ch\u1ecdn ti\u00eau chu\u1ea9n cho l\u1eafp r\u00e1p chung.<\/li>\n<li><strong>B\u01b0\u1edbc ren m\u1ecbn (MF)<\/strong>: b\u01b0\u1edbc ren nh\u1ecf h\u01a1n cho c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh l\u1edbn (v\u00ed d\u1ee5: M10 x 1.0 thay v\u00ec M10 x 1.5). Ren m\u1ecbn c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf l\u1edbn h\u01a1n v\u1edbi c\u00f9ng k\u00edch th\u01b0\u1edbc ngo\u00e0i, ngh\u0129a l\u00e0 di\u1ec7n t\u00edch ch\u1ecbu c\u1eaft l\u1edbn h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ecfng do rung \u0111\u1ed9ng t\u1ed1t h\u01a1n. Tuy nhi\u00ean, ch\u00fang l\u1eafp r\u00e1p ch\u1eadm h\u01a1n v\u00e0 d\u1ec5 b\u1ecb ch\u00e9o ren.<\/li>\n<\/ul>\n<p>Theo <a href=\"https:\/\/en.wikipedia.org\/wiki\/ISO_metric_screw_thread\" target=\"_blank\" rel=\"noopener\">T\u1ed5ng quan v\u1ec1 ren v\u00edt h\u1ec7 m\u00e9t ISO tr\u00ean Wikipedia<\/a>, ti\u00eau chu\u1ea9n ISO 68-1 quy \u0111\u1ecbnh bi\u00ean d\u1ea1ng ren 60 \u0111\u1ed9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng chung cho to\u00e0n b\u1ed9 d\u1ea3i ren h\u1ec7 m\u00e9t, t\u1eeb v\u00edt thi\u1ebft b\u1ecb nh\u1ecf M1.6 \u0111\u1ebfn bu l\u00f4ng k\u1ebft c\u1ea5u M64 v\u00e0 l\u1edbn h\u01a1n. Trong x\u01b0\u1edfng c\u1ee7a ch\u00fang t\u00f4i, kho\u1ea3ng 70% \u0111\u01a1n h\u00e0ng t\u00f9y ch\u1ec9nh t\u1eeb kh\u00e1ch h\u00e0ng ch\u00e2u \u00c2u v\u00e0 ch\u00e2u \u00c1 m\u1eb7c \u0111\u1ecbnh ch\u1ecdn ren th\u00f4 h\u1ec7 m\u00e9t, c\u00f2n c\u00e1c y\u00eau c\u1ea7u ren m\u1ecbn t\u1eadp trung \u1edf l\u0129nh v\u1ef1c \u00f4 t\u00f4 v\u00e0 th\u1ee7y l\u1ef1c, n\u01a1i kh\u1ea3 n\u0103ng ch\u1ed1ng rung \u0111\u1ed9ng r\u1ea5t quan tr\u1ecdng.<\/p>\n<h3>Ren Th\u1ed1ng Nh\u1ea5t: UNC, UNF v\u00e0 UNS<\/h3>\n<p>C\u00e1c <strong>Ti\u00eau chu\u1ea9n Ren Th\u1ed1ng Nh\u1ea5t<\/strong> l\u00e0 h\u1ec7 th\u1ed1ng d\u1ef1a tr\u00ean inch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu t\u1ea1i Vi\u1ec7t Nam, v\u00e0 \u0111\u01b0\u1ee3c chia th\u00e0nh ba d\u00f2ng bao ph\u1ee7 ph\u1ea7n l\u1edbn c\u00e1c <strong>c\u00e1c lo\u1ea1i ren<\/strong> b\u1ea1n s\u1ebd g\u1eb7p tr\u00ean thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i Vi\u1ec7t Nam:<\/p>\n<ul>\n<li><strong>UNC (Unified National Coarse)<\/strong>: t\u01b0\u01a1ng \u0111\u01b0\u01a1ng inch c\u1ee7a b\u01b0\u1edbc ren th\u00f4 h\u1ec7 m\u00e9t; m\u1eb7c \u0111\u1ecbnh cho c\u00e1c m\u1ed1i gh\u00e9p th\u00f4ng th\u01b0\u1eddng, v\u00ed d\u1ee5: 3\/8\u2033-16 UNC<\/li>\n<li><strong>UNF (Unified National Fine)<\/strong>: b\u01b0\u1edbc ren m\u1ecbn h\u01a1n, nhi\u1ec1u v\u00f2ng ren tr\u00ean m\u1ed7i inch, d\u00f9ng khi c\u1ea7n ch\u1ed1ng rung ho\u1eb7c th\u00e0nh m\u1ecfng h\u01a1n, v\u00ed d\u1ee5: 3\/8\u2033-24 UNF<\/li>\n<li><strong>UNS (Unified National Special)<\/strong>: c\u00e1c t\u1ed5 h\u1ee3p b\u01b0\u1edbc ren kh\u00f4ng ti\u00eau chu\u1ea9n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t, th\u01b0\u1eddng th\u1ea5y tr\u00ean thi\u1ebft b\u1ecb c\u0169 ho\u1eb7c chuy\u00ean d\u1ee5ng<\/li>\n<\/ul>\n<p>As <a href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Thread_Standard\" target=\"_blank\" rel=\"noopener\">B\u00e0i vi\u1ebft tr\u00ean Wikipedia v\u1ec1 Ti\u00eau chu\u1ea9n Ren Th\u1ed1ng nh\u1ea5t<\/a> gi\u1ea3i th\u00edch r\u1eb1ng, UNC v\u00e0 UNF c\u00f3 c\u00f9ng g\u00f3c ren 60 \u0111\u1ed9 nh\u01b0 ren h\u1ec7 m\u00e9t ISO, \u0111\u00f3 l\u00e0 l\u00fd do v\u00ec sao bu l\u00f4ng UNC \u0111\u00f4i khi s\u1ebd <em>g\u1ea7n nh\u01b0<\/em> v\u1eb7n v\u00e0o \u0111ai \u1ed1c h\u1ec7 m\u00e9t tr\u01b0\u1edbc khi b\u1ecb k\u1eb9t. S\u1ef1 g\u1ea7n gi\u1ed1ng n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y tu\u1ed9t ren m\u00e0 ch\u00fang t\u00f4i th\u1ea5y \u1edf c\u00e1c b\u1ed9 ph\u1eadn tr\u1ea3 v\u1ec1: g\u00f3c ren \u0111\u1ee7 gi\u1ed1ng \u0111\u1ec3 b\u1eaft \u0111\u1ea7u, nh\u01b0ng b\u01b0\u1edbc ren th\u00ec kh\u00f4ng, v\u00e0 khi c\u1ed1 v\u1eb7n s\u1ebd l\u00e0m h\u1ecfng c\u1ea3 hai chi ti\u1ebft.<\/p>\n<h3>Ren \u1ed1ng: NPT, NPTF, BSP v\u00e0 BSPT<\/h3>\n<p>Ren \u1ed1ng t\u1ea1o th\u00e0nh m\u1ed9t nh\u00f3m ri\u00eang v\u00ec, kh\u00f4ng gi\u1ed1ng nh\u01b0 ren bu l\u00f4ng, nhi\u1ec1u lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 <strong>l\u00e0m k\u00edn<\/strong> c\u0169ng nh\u01b0 gi\u1eef ch\u1eb7t. Hai h\u1ec7 th\u1ed1ng ch\u00ednh l\u00e0:<\/p>\n<ul>\n<li><strong>NPT (Ren \u1ed1ng c\u00f4n qu\u1ed1c gia)<\/strong>: ti\u00eau chu\u1ea9n t\u1ea1i Vi\u1ec7t Nam, v\u1edbi d\u1ea1ng c\u00f4n th\u1eaft ch\u1eb7t khi si\u1ebft. NPT ti\u00eau chu\u1ea9n th\u01b0\u1eddng c\u1ea7n keo l\u00e0m k\u00edn ho\u1eb7c b\u0103ng PTFE \u0111\u1ec3 ch\u1ed1ng r\u00f2 r\u1ec9.<\/li>\n<li><strong>NPTF (Ren \u1ed1ng c\u00f4n nhi\u00ean li\u1ec7u qu\u1ed1c gia)<\/strong>: phi\u00ean b\u1ea3n dung sai ch\u1eb7t h\u01a1n c\u1ee7a NPT, thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m k\u00edn kim lo\u1ea1i v\u1edbi kim lo\u1ea1i m\u00e0 kh\u00f4ng c\u1ea7n b\u0103ng, ph\u1ed5 bi\u1ebfn trong \u0111\u01b0\u1eddng d\u1eabn nhi\u00ean li\u1ec7u v\u00e0 th\u1ee7y l\u1ef1c<\/li>\n<li><strong>BSP (Ren \u1ed1ng ti\u00eau chu\u1ea9n Anh)<\/strong>: ren song song (th\u1eb3ng, kh\u00f4ng c\u00f4n), l\u00e0m k\u00edn b\u1eb1ng v\u00f2ng \u0111\u1ec7m ho\u1eb7c gio\u0103ng t\u1ea1i m\u1eb7t n\u1ed1i<\/li>\n<li><strong>BSPT (Ren \u1ed1ng c\u00f4n ti\u00eau chu\u1ea9n Anh)<\/strong>: lo\u1ea1i ren c\u00f4n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a Anh v\u1edbi NPT, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i ngo\u00e0i Vi\u1ec7t Nam<\/li>\n<\/ul>\n<p>Theo <a href=\"https:\/\/web.mae.ufl.edu\/designlab\/Lab%20Resources\/Types_of_threads.pdf\" target=\"_blank\" rel=\"noopener\">T\u00e0i li\u1ec7u tham kh\u1ea3o PDF v\u1ec1 c\u00e1c lo\u1ea1i ren t\u1eeb ph\u00f2ng thi\u1ebft k\u1ebf c\u1ee7a \u0110\u1ea1i h\u1ecdc Florida<\/a>, vi\u1ec7c tr\u1ed9n l\u1eabn c\u00e1c ph\u1ee5 ki\u1ec7n NPT v\u00e0 BSP, ngay c\u1ea3 khi ch\u00fang \u201cv\u1eeba kh\u00edt\u201d, l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n g\u00e2y r\u00f2 r\u1ec9 ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c h\u1ec7 th\u1ed1ng kh\u00ed n\u00e9n v\u00e0 th\u1ee7y l\u1ef1c, v\u00ec m\u1ed9t ren c\u00f4n NPT l\u1eafp v\u00e0o m\u1ed9t c\u1ed5ng BSP song song s\u1ebd kh\u00f4ng bao gi\u1edd \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 kh\u00edt kim lo\u1ea1i v\u1edbi kim lo\u1ea1i c\u1ea7n thi\u1ebft.<\/p>\n<blockquote>\n<p><strong>M\u1eb9o mua s\u1eafm:<\/strong> n\u1ebfu m\u1ed9t ph\u1ee5 ki\u1ec7n v\u1eb7n v\u00e0o tr\u01a1n tru trong hai ho\u1eb7c ba v\u00f2ng \u0111\u1ea7u ti\u00ean r\u1ed3i \u0111\u1ed9t ng\u1ed9t ch\u1eb7t l\u1ea1i, \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a ren c\u00f4n (NPT\/BSPT) \u0111ang l\u1eafp \u0111\u00fang c\u00e1ch. N\u1ebfu n\u00f3 v\u1eb7n h\u1ebft xu\u1ed1ng v\u1edbi l\u1ef1c c\u1ea3n \u0111\u1ec1u t\u1eeb \u0111\u1ea7u \u0111\u1ebfn cu\u1ed1i, c\u00f3 th\u1ec3 \u0111\u00f3 l\u00e0 ren song song (BSP, h\u1ec7 m\u00e9t ho\u1eb7c d\u00f2ng UN).<\/p>\n<\/blockquote>\n<p><img decoding=\"async\" alt=\"c\u00e1c lo\u1ea1i ren: so s\u00e1nh bu l\u00f4ng ren h\u1ec7 m\u00e9t, UNC\/UNF v\u00e0 ren \u1ed1ng \u0111\u01b0\u1ee3c b\u00e0y tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/06\/types-of-threads-types.png\" \/><\/p>\n<h2>C\u00e1c d\u1ea1ng ren chuy\u00ean d\u1ee5ng v\u00e0 truy\u1ec1n \u0111\u1ed9ng c\u00f4ng su\u1ea5t<\/h2>\n<p>Ngo\u00e0i c\u00e1c nh\u00f3m ren ti\u00eau chu\u1ea9n, m\u1ed9t s\u1ed1 lo\u1ea1i chuy\u00ean d\u1ee5ng <strong>c\u00e1c lo\u1ea1i ren<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m nh\u1eefng vi\u1ec7c kh\u00e1c ngo\u00e0i vi\u1ec7c ch\u1ec9 gi\u1eef hai b\u1ed9 ph\u1eadn l\u1ea1i v\u1edbi nhau. Ch\u00fang chuy\u1ec3n \u0111\u1ed5i chuy\u1ec3n \u0111\u1ed9ng quay th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng t\u1ecbnh ti\u1ebfn, t\u1ef1 t\u1ea1o ren \u0103n kh\u1edbp ho\u1eb7c ch\u1ecbu t\u1ea3i d\u1ecdc tr\u1ee5c theo m\u1ed9t h\u01b0\u1edbng. Ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c \u00edt c\u00e2u h\u1ecfi h\u01a1n v\u1ec1 c\u00e1c lo\u1ea1i ren v\u00edt n\u00e0y h\u00e0ng ng\u00e0y, nh\u01b0ng khi kh\u00e1ch h\u00e0ng c\u1ea7n, thay th\u1ebf sai d\u1ea1ng th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn th\u1ea5t b\u1ea1i ho\u00e0n to\u00e0n thay v\u00ec ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng k\u00e9m.<\/p>\n<h3>Ren ACME v\u00e0 ren thang<\/h3>\n<p><strong>Ren ACME<\/strong> (g\u00f3c ren 29\u00b0) v\u00e0 <strong>ren thang<\/strong> (g\u00f3c 30\u00b0, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng h\u1ec7 m\u00e9t, th\u01b0\u1eddng g\u1ecdi l\u00e0 ren Tr) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho <strong>chuy\u1ec3n \u0111\u1ed9ng t\u1ecbnh ti\u1ebfn<\/strong>, kh\u00f4ng ph\u1ea3i l\u1ef1c k\u1eb9p. B\u1ea1n s\u1ebd th\u1ea5y ch\u00fang tr\u00ean:<\/p>\n<ul>\n<li>Tr\u1ee5c v\u00edt d\u1eabn trong m\u00e1y CNC, m\u00e1y in 3D v\u00e0 thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m<\/li>\n<li>Tr\u1ee5c v\u00edt \u00ea-t\u00f4 v\u00e0 tr\u1ee5c v\u00edt k\u1eb9p ch\u1eef C<\/li>\n<li>Tr\u1ee5c van tr\u00ean c\u00e1c van c\u00f4ng nghi\u1ec7p l\u1edbn<\/li>\n<li>K\u00edch n\u00e2ng v\u00e0 c\u01a1 c\u1ea5u n\u00e2ng h\u1ea1<\/li>\n<\/ul>\n<p>H\u1ed3 s\u01a1 r\u1ed9ng v\u00e0 ph\u1eb3ng h\u01a1n c\u1ee7a ren ACME v\u00e0 ren thang gi\u00fap ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng tr\u00ean di\u1ec7n t\u00edch ti\u1ebfp x\u00fac l\u1edbn h\u01a1n v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c m\u00e0i m\u00f2n do ti\u1ebfp x\u00fac tr\u01b0\u1ee3t li\u00ean t\u1ee5c, \u0111i\u1ec1u m\u00e0 ren v\u00edt nh\u1ecdn 60\u00b0 s\u1ebd nhanh ch\u00f3ng b\u1ecb m\u00f2n.<\/p>\n<h3>Ren Buttress<\/h3>\n<p><strong>Ren buttress<\/strong> c\u00f3 d\u1ea1ng h\u00ecnh h\u1ecdc b\u1ea5t \u0111\u1ed1i x\u1ee9ng: m\u1ed9t m\u1eb7t g\u1ea7n nh\u01b0 vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ren (kho\u1ea3ng 7\u00b0) trong khi m\u1eb7t c\u00f2n l\u1ea1i nghi\u00eang (kho\u1ea3ng 45\u00b0). Thi\u1ebft k\u1ebf n\u00e0y truy\u1ec1n l\u1ef1c r\u1ea5t l\u1edbn theo m\u1ed9t h\u01b0\u1edbng trong khi l\u1ea1i kh\u00e1 y\u1ebfu \u1edf h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i. Ren buttress th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong:<\/p>\n<ul>\n<li>C\u01a1 c\u1ea5u kh\u00f3a n\u00f2ng ph\u00e1o v\u00e0 c\u00e1c b\u00ecnh ch\u1ecbu \u00e1p su\u1ea5t cao<\/li>\n<li>\u00ca-t\u00f4 v\u00e0 k\u1eb9p ch\u1ec9 ch\u1ecbu t\u1ea3i theo m\u1ed9t h\u01b0\u1edbng<\/li>\n<li>Kh\u1edbp n\u1ed1i nhanh cho \u1ed1ng kh\u00ed n\u00e9n v\u00e0 thi\u1ebft b\u1ecb th\u1ee7y l\u1ef1c<\/li>\n<\/ul>\n<h3>V\u00edt t\u1ef1 khoan v\u00e0 v\u00edt t\u1ea1o ren<\/h3>\n<p>D\u00f9ng cho kim lo\u1ea1i t\u1ea5m, nh\u1ef1a v\u00e0 v\u1ecf \u0111\u00fac \u00e1p l\u1ef1c, <strong>\u1ed1c v\u00edt t\u1ef1 khoan<\/strong> t\u1ef1 c\u1eaft ho\u1eb7c t\u1ea1o ren \u0103n kh\u1edbp khi \u0111\u01b0\u1ee3c v\u1eb7n v\u00e0o, kh\u00f4ng c\u1ea7n l\u1ed7 ren s\u1eb5n ho\u1eb7c \u0111ai \u1ed1c. C\u00f3 hai c\u01a1 ch\u1ebf kh\u00e1c nhau, v\u00e0 vi\u1ec7c nh\u1ea7m l\u1eabn gi\u1eefa ch\u00fang l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y n\u1ee9t v\u1ee1 v\u1ecf nh\u1ef1a:<\/p>\n<ol>\n<li><strong>V\u00edt c\u1eaft ren<\/strong> c\u00f3 r\u00e3nh ho\u1eb7c khe g\u1ea7n \u0111\u1ea7u m\u0169i, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u0169i tar\u00f4, lo\u1ea1i b\u1ecf v\u1eadt li\u1ec7u khi v\u00edt ti\u1ebfn v\u00e0o. Ph\u00f9 h\u1ee3p nh\u1ea5t cho nh\u1ef1a c\u1ee9ng h\u01a1n v\u00e0 kim lo\u1ea1i t\u1ea5m, nh\u01b0ng phoi sinh ra c\u00f3 th\u1ec3 l\u00e0m b\u1ea9n c\u00e1c c\u1ee5m l\u1eafp r\u00e1p nh\u1ea1y c\u1ea3m.<\/li>\n<li><strong>V\u00edt \u0111\u1ecbnh h\u00ecnh ren<\/strong> kh\u00f4ng c\u00f3 r\u00e3nh. Ch\u00fang l\u00e0m bi\u1ebfn d\u1ea1ng v\u1eadt li\u1ec7u m\u1ed9t c\u00e1ch d\u1ebbo, \u0111\u1ea9y v\u1eadt li\u1ec7u ra ngo\u00e0i \u0111\u1ec3 t\u1ea1o ren \u0103n kh\u1edbp m\u00e0 kh\u00f4ng c\u1eaft phoi. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n cho nh\u1ef1a nhi\u1ec7t d\u1ebbo m\u1ec1m v\u00ec tr\u00e1nh \u0111\u01b0\u1ee3c \u0111i\u1ec3m t\u1eadp trung \u1ee9ng su\u1ea5t g\u00e2y n\u1ee9t v\u1ee1.<\/li>\n<\/ol>\n<p>N\u1ebfu chi ti\u1ebft c\u1ee7a b\u1ea1n l\u00e0 nh\u1ef1a \u00e9p phun v\u00e0 b\u1ea1n th\u1ea5y c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf t\u1ecfa ra t\u1eeb ch\u00e2n v\u00edt, chuy\u1ec3n t\u1eeb v\u00edt c\u1eaft ren sang v\u00edt t\u1ea1o ren, v\u00e0 t\u0103ng nh\u1eb9 \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a ch\u00e2n v\u00edt, th\u01b0\u1eddng l\u00e0 gi\u1ea3i ph\u00e1p kh\u1eafc ph\u1ee5c. Ch\u00fang t\u00f4i tr\u00ecnh b\u00e0y chi ti\u1ebft khuy\u1ebfn ngh\u1ecb v\u1ec1 k\u00edch th\u01b0\u1edbc trong h\u01b0\u1edbng d\u1eabn v\u1ec1 <a href=\"https:\/\/productionscrews.com\/vi\/self-tapping-screws-for-plastic\/\" target=\"_blank\">v\u00edt t\u1ef1 khoan cho nh\u1ef1a<\/a>.<\/p>\n<h2>C\u1ea5p dung sai v\u00e0 \u0111\u1ed9 l\u1eafp gh\u00e9p c\u1ee7a ren<\/h2>\n<p>\u0110\u00e2y l\u00e0 ph\u1ea7n ph\u1ee9c t\u1ea1p h\u01a1n, v\u00e0 c\u0169ng l\u00e0 n\u01a1i h\u1ea7u h\u1ebft c\u00e1c t\u1ed5ng quan v\u1ec1 lo\u1ea1i ren th\u01b0\u1eddng b\u1ecf qua. Bi\u1ebft r\u1eb1ng m\u1ed9t bu l\u00f4ng l\u00e0 \u201cM10 x 1.5\u201d ho\u1eb7c \u201c3\/8\u2033-16 UNC\u201d ch\u1ec9 cho b\u1ea1n bi\u1ebft <em>k\u00edch th\u01b0\u1edbc<\/em>. N\u00f3 kh\u00f4ng cho b\u1ea1n bi\u1ebft <em>\u0111\u1ed9 l\u1eafp gh\u00e9p<\/em>. Hai bu l\u00f4ng c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc danh ngh\u0129a c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng r\u1ea5t kh\u00e1c nhau t\u00f9y v\u00e0o c\u1ea5p dung sai c\u1ee7a ch\u00fang, v\u00e0 \u0111\u00e2y l\u00e0 ph\u1ea7n m\u00e0 h\u1ea7u h\u1ebft c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 lo\u1ea1i ren \u0111\u1ec1u b\u1ecf qua ho\u00e0n to\u00e0n.<\/p>\n<h3>H\u1ec7 inch: C\u00e1c c\u1ea5p 1A\/2A\/3A v\u00e0 1B\/2B\/3B<\/h3>\n<p>\u0110\u1ed1i v\u1edbi ren Unified, ren ngo\u00e0i (bu l\u00f4ng, ty ren) c\u00f3 h\u1eadu t\u1ed1 \u201cA\u201d v\u00e0 ren trong (\u0111ai \u1ed1c, l\u1ed7 ren) c\u00f3 h\u1eadu t\u1ed1 \u201cB\u201d:<\/p>\n<ul>\n<li><strong>L\u1edbp 1A\/1B<\/strong>: l\u1eafp l\u1ecfng, cho ph\u00e9p l\u1eafp r\u00e1p\/th\u00e1o r\u1eddi nhanh v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec5m b\u1ea9n; hi\u1ebfm g\u1eb7p trong s\u1ea3n xu\u1ea5t hi\u1ec7n \u0111\u1ea1i<\/li>\n<li><strong>L\u1edbp 2A\/2B<\/strong>: ki\u1ec3u l\u1eafp ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i ch\u1ed1t th\u01b0\u01a1ng m\u1ea1i; c\u00e2n b\u1eb1ng gi\u1eefa d\u1ec5 l\u1eafp r\u00e1p v\u00e0 \u0111\u1ed9 gi\u1eef ch\u1eafc<\/li>\n<li><strong>L\u1edbp 3A\/3B<\/strong>: l\u1eafp ch\u1eb7t v\u1edbi khe h\u1edf t\u1ed1i thi\u1ec3u, d\u00f9ng khi c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u00edt \u0111\u1ed9 r\u01a1, nh\u01b0 trong ch\u1ed1t h\u00e0ng kh\u00f4ng v\u00e0 thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c<\/li>\n<\/ul>\n<h3>H\u1ec7 m\u00e9t: C\u1ea5p dung sai v\u00e0 v\u1ecb tr\u00ed dung sai<\/h3>\n<p>Ren h\u1ec7 m\u00e9t s\u1eed d\u1ee5ng c\u1ea5p dung sai (m\u1ed9t s\u1ed1 ch\u1ec9 m\u1ee9c \u0111\u1ed9 dung sai) k\u1ebft h\u1ee3p v\u1edbi v\u1ecb tr\u00ed dung sai (m\u1ed9t ch\u1eef c\u00e1i ch\u1ec9 v\u1ecb tr\u00ed dung sai so v\u1edbi k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n):<\/p>\n<ul>\n<li><strong>6g<\/strong>: dung sai ren ngo\u00e0i ph\u1ed5 bi\u1ebfn nh\u1ea5t cho bu l\u00f4ng m\u1ee5c \u0111\u00edch chung, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi h\u1ec7 inch c\u1ea5p 2A<\/li>\n<li><strong>6H<\/strong>: dung sai ren trong ph\u1ed5 bi\u1ebfn nh\u1ea5t cho \u0111ai \u1ed1c v\u00e0 l\u1ed7 ren, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi h\u1ec7 inch c\u1ea5p 2B<\/li>\n<li><strong>4h6h, 5g6g, v\u00e0 c\u00e1c t\u1ed5 h\u1ee3p t\u01b0\u01a1ng t\u1ef1<\/strong>: dung sai ch\u1eb7t h\u01a1n d\u00f9ng cho l\u1eafp ch\u00ednh x\u00e1c, th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh khi ch\u1ed1t s\u1ebd l\u1eafp\/th\u00e1o nhi\u1ec1u l\u1ea7n<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>Y\u00eau c\u1ea7u l\u1eafp<\/th>\n<th>C\u1ea5p inch<\/th>\n<th>T\u01b0\u01a1ng \u0111\u01b0\u01a1ng h\u1ec7 m\u00e9t<\/th>\n<th>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Th\u01b0\u01a1ng m\u1ea1i th\u00f4ng d\u1ee5ng<\/td>\n<td>2A \/ 2B<\/td>\n<td>6g \/ 6H<\/td>\n<td>Bu l\u00f4ng, \u0111ai \u1ed1c, v\u00edt m\u00e1y ti\u00eau chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td>Ch\u00ednh x\u00e1c \/ l\u1eafp r\u00e1p nhi\u1ec1u l\u1ea7n<\/td>\n<td>3A \/ 3B<\/td>\n<td>4h6h \/ 5H<\/td>\n<td>H\u00e0ng kh\u00f4ng, thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng<\/td>\n<\/tr>\n<tr>\n<td>L\u1eafp l\u1ecfng \/ m\u00f4i tr\u01b0\u1eddng nhi\u1ec1u b\u1ee5i b\u1ea9n<\/td>\n<td>1A \/ 1B<\/td>\n<td>8g \/ 7H<\/td>\n<td>Thi\u1ebft b\u1ecb n\u00f4ng nghi\u1ec7p, khai kho\u00e1ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Tr\u00ean th\u1ef1c t\u1ebf, b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ebfm khi \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111i\u1ec1u n\u00e0y, nh\u01b0ng c\u1ea5p dung sai th\u01b0\u1eddng l\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u1ef1c s\u1ef1 khi kh\u00e1ch h\u00e0ng n\u00f3i \u201cl\u00f4 h\u00e0ng m\u1edbi kh\u00f4ng v\u1eeba nh\u01b0 l\u00f4 c\u0169\u201d, m\u1eb7c d\u00f9 c\u1ea3 hai l\u00f4 \u0111\u1ec1u \u0111o trong \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a v\u00e0 b\u01b0\u1edbc ren. Ch\u00fang t\u00f4i \u0111\u00e3 truy ra h\u01a1n m\u1ed9t l\u1ea7n khi\u1ebfu n\u1ea1i v\u1ec1 \u201cl\u00f4 h\u00e0ng l\u1ed7i\u201d l\u00e0 do nh\u00e0 cung c\u1ea5p chuy\u1ec3n t\u1eeb dung sai 6g sang 8g m\u00e0 kh\u00f4ng th\u00f4ng b\u00e1o, \u0111i\u1ec1u n\u00e0y l\u00e0m cho \u0111\u1ed9 l\u1ecfng v\u1eeba \u0111\u1ee7 \u0111\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng l\u1ecfng do rung \u0111\u1ed9ng ngo\u00e0i th\u1ef1c t\u1ebf.<\/p>\n<h2>C\u00e1ch ch\u1ecdn lo\u1ea1i ren ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n<\/h2>\n<p>Sau hai th\u1eadp k\u1ef7 cung c\u1ea5p ch\u1ed1t v\u00e0o c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4, \u0111i\u1ec7n t\u1eed v\u00e0 \u0111\u01b0\u1eddng ray, quy tr\u00ecnh l\u1ef1a ch\u1ecdn m\u00e0 ch\u00fang t\u00f4i h\u01b0\u1edbng d\u1eabn kh\u00e1ch h\u00e0ng th\u01b0\u1eddng ch\u1ec9 xoay quanh b\u1ed1n c\u00e2u h\u1ecfi, theo th\u1ee9 t\u1ef1 n\u00e0y. Kh\u00f4ng c\u00e2u h\u1ecfi n\u00e0o trong s\u1ed1 n\u00e0y y\u00eau c\u1ea7u ph\u1ea3i ghi nh\u1edb m\u1ecdi m\u1ee5c trong b\u1ea3ng ren. Ch\u00fang nh\u1eb1m thu h\u1eb9p ph\u1ea1m vi c\u00e1c lo\u1ea1i ren c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng xu\u1ed1ng m\u1ed9t ho\u1eb7c hai lo\u1ea1i th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi c\u00f4ng vi\u1ec7c.<\/p>\n<h3>1. B\u1ea1n s\u1ebd v\u1eb7n ren v\u00e0o v\u1eadt li\u1ec7u g\u00ec?<\/h3>\n<ul>\n<li><strong>Kim lo\u1ea1i v\u1edbi kim lo\u1ea1i, \u0111\u00e3 \u0111\u01b0\u1ee3c taro s\u1eb5n<\/strong> \u2192 ren m\u00e1y chu\u1ea9n h\u1ec7 m\u00e9t (M) ho\u1eb7c h\u1ec7 th\u1ed1ng ren th\u1ed1ng nh\u1ea5t (UNC\/UNF)<\/li>\n<li><strong>T\u00f4n ho\u1eb7c v\u1eadt li\u1ec7u \u0111\u00f9n th\u00e0nh v\u00e1ch m\u1ecfng<\/strong> \u2192 v\u00edt t\u1ef1 t\u1ea1o ren ho\u1eb7c v\u00edt t\u1ef1 c\u1eaft ren<\/li>\n<li><strong>Nh\u1ef1a \u00e9p phun<\/strong> \u2192 v\u00edt t\u1ef1 t\u1ea1o ren c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p v\u1edbi ch\u00e2n \u0111\u1ee1, kh\u00f4ng bao gi\u1edd d\u00f9ng ren m\u00e1y chu\u1ea9n v\u1eb7n tr\u1ef1c ti\u1ebfp v\u00e0o nh\u1ef1a<\/li>\n<li><strong>K\u1ebft n\u1ed1i k\u00edn \u00e1p su\u1ea5t (kh\u00ed, ch\u1ea5t l\u1ecfng, gas)<\/strong> \u2192 NPT, NPTF ho\u1eb7c BSP\/BSPT t\u00f9y theo ti\u00eau chu\u1ea9n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn t\u1ea1i Vi\u1ec7t Nam<\/li>\n<\/ul>\n<h3>2. B\u1ed9 ph\u1eadn l\u1eafp r\u00e1p theo ti\u00eau chu\u1ea9n ho\u1eb7c khu v\u1ef1c n\u00e0o?<\/h3>\n<p>M\u1ed9t chi ti\u1ebft d\u00f9ng cho d\u00e2y chuy\u1ec1n OEM t\u1ea1i Vi\u1ec7t Nam g\u1ea7n nh\u01b0 lu\u00f4n ch\u1ec9 \u0111\u1ecbnh h\u1ec7 m\u00e9t. Thi\u1ebft b\u1ecb c\u0169 t\u1ea1i Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u01b0\u1edbc n\u0103m 2000, th\u01b0\u1eddng s\u1eed d\u1ee5ng h\u1ec7 UNC\/UNF. C\u00e1c \u0111\u1ed9i m\u00e1y h\u1ed7n h\u1ee3p, ph\u1ed5 bi\u1ebfn trong c\u00e1c ng\u00e0nh nh\u01b0 \u0111\u01b0\u1eddng s\u1eaft v\u00e0 thi\u1ebft b\u1ecb n\u1eb7ng, th\u01b0\u1eddng c\u00f3 c\u1ea3 hai lo\u1ea1i, \u0111\u00f3 l\u00e0 l\u00fd do v\u00ec sao vi\u1ec7c d\u00e1n nh\u00e3n v\u00e0 ph\u00e2n lo\u1ea1i th\u00f9ng ch\u1ee9a theo h\u1ecd ren kh\u00f4ng ch\u1ec9 l\u00e0 g\u1ecdn g\u00e0ng. \u0110\u00f3 l\u00e0 c\u00e1ch b\u1ea1n tr\u00e1nh m\u1ea5t 20 ph\u00fat \u0111\u1ec3 t\u00ecm \u201ccon bu l\u00f4ng n\u1eeda inch c\u00f2n l\u1ea1i\u201d.<\/p>\n<h3>3. Ren s\u1ebd ch\u1ecbu t\u1ea3i g\u00ec?<\/h3>\n<ul>\n<li><strong>T\u1ea3i k\u1eb9p t\u0129nh<\/strong> \u2192 b\u01b0\u1edbc ren th\u00f4 (M ho\u1eb7c UNC) th\u01b0\u1eddng \u0111\u1ee7 v\u00e0 d\u1ec5 l\u1eafp r\u00e1p h\u01a1n<\/li>\n<li><strong>Rung \u0111\u1ed9ng ho\u1eb7c t\u1ea3i tr\u1ecdng chu k\u1ef3<\/strong> \u2192 b\u01b0\u1edbc ren nh\u1ecf (MF ho\u1eb7c UNF), ho\u1eb7c b\u01b0\u1edbc ren l\u1edbn k\u1ebft h\u1ee3p v\u1edbi ph\u01b0\u01a1ng ph\u00e1p kh\u00f3a ren c\u01a1 h\u1ecdc ho\u1eb7c h\u00f3a h\u1ecdc<\/li>\n<li><strong>Chuy\u1ec3n \u0111\u1ed9ng tuy\u1ebfn t\u00ednh ho\u1eb7c chu k\u1ef3 l\u1eb7p l\u1ea1i<\/strong> \u2192 ren ACME ho\u1eb7c ren thang, \u0111\u01b0\u1ee3c ch\u1ecdn k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p v\u1edbi tu\u1ed5i th\u1ecd m\u00f2n d\u1ef1 ki\u1ebfn<\/li>\n<\/ul>\n<h3>4. H\u1eadu qu\u1ea3 n\u1ebfu ch\u1ecdn sai l\u00e0 g\u00ec?<\/h3>\n<p>Nghe c\u00f3 v\u1ebb hi\u1ec3n nhi\u00ean, nh\u01b0ng \u0111i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf. M\u1ed9t v\u00edt c\u1ed1 \u0111\u1ecbnh l\u1ecfng tr\u00ean n\u1eafp kh\u00f4ng quan tr\u1ecdng ch\u1ec9 g\u00e2y phi\u1ec1n to\u00e1i. M\u1ed9t ch\u1ed1t n\u1ed1i b\u1ecb l\u1ecfng tr\u00ean c\u1ee5m c\u1ed1 \u0111\u1ecbnh ray t\u00e0u cao t\u1ed1c ho\u1eb7c gi\u00e1 \u0111\u1ee1 \u0103ng-ten 5G l\u00e0 v\u1ea5n \u0111\u1ec1 an to\u00e0n v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng, v\u00e0 \u0111\u00f3 l\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng m\u00e0 ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng dung sai Class 3A\/3B ho\u1eb7c 6g\/6H v\u1edbi \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc \u0111\u00e3 ki\u1ec3m tra, d\u00f9 chi ph\u00ed \u0111\u01a1n v\u1ecb cao h\u01a1n.<\/p>\n<h3>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi ch\u1ec9 \u0111\u1ecbnh ren<\/h3>\n<ul>\n<li><strong>Cho r\u1eb1ng \u201cv\u1eb7n v\u00e0o \u0111\u01b0\u1ee3c\u201d ngh\u0129a l\u00e0 \u201c\u0111\u00e3 \u0111\u00fang\u201d.<\/strong> C\u00e1c b\u01b0\u1edbc ren g\u1ea7n nhau tr\u00ean c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh l\u1edbn (v\u00ed d\u1ee5: M8 so v\u1edbi k\u00edch th\u01b0\u1edbc inch g\u1ea7n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng h\u1ec7 m\u00e9t) c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u \u0103n kh\u1edbp tr\u01b0\u1edbc khi b\u1ecb k\u1eb9t, v\u00ec v\u1eady \u0111\u1eebng tin v\u00e0o v\u00e0i v\u00f2ng \u0111\u1ea7u ti\u00ean.<\/li>\n<li><strong>Tr\u1ed9n l\u1eabn ren \u1ed1ng c\u00f4n v\u00e0 ren \u1ed1ng song song<\/strong> m\u00e0 kh\u00f4ng c\u00f3 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m k\u00edn ph\u00f9 h\u1ee3p, d\u1eabn \u0111\u1ebfn r\u00f2 r\u1ec9 ch\u1eadm v\u01b0\u1ee3t qua ki\u1ec3m tra \u00e1p su\u1ea5t ban \u0111\u1ea7u nh\u01b0ng th\u1ea5t b\u1ea1i khi s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf.<\/li>\n<li><strong>Ch\u1ec9 \u0111\u1ecbnh ren b\u01b0\u1edbc nh\u1ecf v\u00e0o v\u1eadt li\u1ec7u m\u1ec1m<\/strong> nh\u01b0 nh\u00f4m ho\u1eb7c nh\u1ef1a, n\u01a1i \u0111\u1ed9 s\u00e2u ren n\u00f4ng d\u1ec5 b\u1ecb tu\u1ed9t d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/li>\n<li><strong>Kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh c\u1ea5p dung sai<\/strong> ho\u00e0n to\u00e0n, \u0111\u1ec3 nh\u00e0 cung c\u1ea5p t\u1ef1 m\u1eb7c \u0111\u1ecbnh, \u0111i\u1ec1u n\u00e0y \u1ed5n cho \u0111\u1ebfn khi hai nh\u00e0 cung c\u1ea5p m\u1eb7c \u0111\u1ecbnh kh\u00e1c nhau.<\/li>\n<li><strong>Xem t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i ren nh\u01b0 \u201cch\u1ed1t n\u1ed1i\u201d thay th\u1ebf cho nhau<\/strong> trong b\u1ea3ng k\u00ea v\u1eadt t\u01b0, m\u00e0 kh\u00f4ng ph\u00e2n bi\u1ec7t gi\u1eefa ren k\u1eb9p, ren l\u00e0m k\u00edn v\u00e0 ren chuy\u1ec3n \u0111\u1ed9ng. Ba lo\u1ea1i n\u00e0y kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c thay th\u1ebf cho nhau.<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"c\u00e1c lo\u1ea1i ren: k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh bu l\u00f4ng kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/06\/types-of-threads-howto.png\" \/><\/p>\n<h2>C\u00e1ch x\u00e1c \u0111\u1ecbnh lo\u1ea1i ren kh\u00f4ng r\u00f5<\/h2>\n<p>Quay l\u1ea1i v\u1edbi t\u00fai b\u1ed1n m\u01b0\u01a1i bu l\u00f4ng h\u1ed7n h\u1ee3p: \u0111\u00e2y l\u00e0 quy tr\u00ecnh th\u1ef1c t\u1ebf ch\u00fang t\u00f4i s\u1eed d\u1ee5ng t\u1ea1i x\u01b0\u1edfng khi c\u00e1c lo\u1ea1i ren tr\u01b0\u1edbc m\u1eb7t kh\u00f4ng \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n.<\/p>\n<ol>\n<li><strong>\u0110o \u0111\u01b0\u1eddng k\u00ednh l\u1edbn<\/strong> b\u1eb1ng th\u01b0\u1edbc k\u1eb9p. \u0110i\u1ec1u n\u00e0y gi\u00fap thu h\u1eb9p ph\u1ea1m vi ngay l\u1eadp t\u1ee9c: \u0111\u01b0\u1eddng k\u00ednh l\u1edbn 10mm l\u00e0 M10 ho\u1eb7c g\u1ea7n v\u1edbi bu l\u00f4ng 3\/8\u2033 inch (9,525mm), c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c khi quan s\u00e1t k\u1ef9 h\u01a1n.<\/li>\n<li><strong>S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren<\/strong> (m\u1ed9t b\u1ed9 l\u00e1 kim lo\u1ea1i x\u1ebfp qu\u1ea1t v\u1edbi c\u00e1c kho\u1ea3ng c\u00e1ch r\u0103ng kh\u00e1c nhau) \u00e1p v\u00e0o ren. T\u00ecm l\u00e1 v\u1eeba kh\u00edt m\u00e0 kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng l\u1ecdt qua. \u0110\u00f3 l\u00e0 b\u01b0\u1edbc ren c\u1ee7a b\u1ea1n (mm) ho\u1eb7c s\u1ed1 ren tr\u00ean inch (TPI).<\/li>\n<li><strong>Ki\u1ec3m tra g\u00f3c ren<\/strong> n\u1ebfu chi ti\u1ebft c\u00f3 h\u00ecnh d\u1ea1ng l\u1ea1. 60\u00b0 \u00e1p d\u1ee5ng cho h\u1ec7 m\u00e9t v\u00e0 Unified, 55\u00b0 g\u1ee3i \u00fd Whitworth\/BSP, v\u00e0 29-30\u00b0 ch\u1ec9 ACME ho\u1eb7c ren thang.<\/li>\n<li><strong>T\u00ecm d\u1ea5u hi\u1ec7u c\u00f4n.<\/strong> L\u0103n chi ti\u1ebft tr\u00ean b\u1ec1 m\u1eb7t ph\u1eb3ng ho\u1eb7c nh\u00ecn d\u1ecdc theo chi\u1ec1u d\u00e0i. Ren \u1ed1ng (NPT\/BSPT) s\u1ebd c\u00f4n r\u00f5 r\u1ec7t v\u1ec1 ph\u00eda \u0111\u1ea7u; ren m\u00e1y th\u00ec kh\u00f4ng.<\/li>\n<li><strong>\u0110\u1ed1i chi\u1ebfu v\u1edbi b\u1ea3ng tra.<\/strong> Khi \u0111\u00e3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh, b\u01b0\u1edbc ren\/TPI v\u00e0 g\u00f3c, b\u1ea3ng tra ren ti\u00eau chu\u1ea9n (h\u1ec7 m\u00e9t, UNC\/UNF ho\u1eb7c ren \u1ed1ng) s\u1ebd x\u00e1c nh\u1eadn lo\u1ea1i ren ch\u1ec9 trong v\u00e0i gi\u00e2y.<\/li>\n<\/ol>\n<blockquote>\n<p>Th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren c\u00f3 gi\u00e1 th\u1ea5p h\u01a1n m\u1ed9t l\u1ea7n ch\u1ea1y mua ph\u1ee5 t\u00f9ng kh\u1ea9n c\u1ea5p. N\u1ebfu x\u01b0\u1edfng c\u1ee7a b\u1ea1n ch\u01b0a c\u00f3 m\u1ed9t c\u00e1i trong m\u1ed7i h\u1ed9p d\u1ee5ng c\u1ee5, \u0111\u00f3 l\u00e0 \u0111i\u1ec1u c\u1ea7n kh\u1eafc ph\u1ee5c \u0111\u1ea7u ti\u00ean. H\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u1eadn di\u1ec7n sai ren \u0111\u1ec1u \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft trong ch\u01b0a \u0111\u1ea7y m\u1ed9t ph\u00fat v\u1edbi th\u01b0\u1edbc \u0111o ph\u00f9 h\u1ee3p.<\/p>\n<\/blockquote>\n<h2>Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai trong ti\u00eau chu\u1ea9n ren UNC (2026 tr\u1edf \u0111i)<\/h2>\n<p>Th\u1ebf gi\u1edbi bu l\u00f4ng \u0111ai \u1ed1c ph\u00e1t tri\u1ec3n ch\u1eadm m\u1ed9t c\u00e1ch c\u00f3 ch\u1ee7 \u00fd. C\u00e1c lo\u1ea1i ren hi\u1ec7n \u0111ang s\u1eed d\u1ee5ng ph\u1ea7n l\u1edbn v\u1eabn t\u01b0\u01a1ng th\u00edch v\u1edbi ti\u00eau chu\u1ea9n t\u1eeb gi\u1eefa th\u1ebf k\u1ef7 20, v\u00e0 \u0111\u00f3 l\u00e0 m\u1ed9t \u01b0u \u0111i\u1ec3m ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 tr\u00ec tr\u1ec7. C\u00e1c lo\u1ea1i ren ch\u00ednh m\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf \u0111\u00e2y s\u1ebd kh\u00f4ng bi\u1ebfn m\u1ea5t; \u0111i\u1ec1u thay \u0111\u1ed5i l\u00e0 lo\u1ea1i n\u00e0o \u0111\u01b0\u1ee3c ch\u1ecdn m\u1eb7c \u0111\u1ecbnh v\u00e0 dung sai ch\u1eb7t ch\u1ebd \u0111\u1ebfn m\u1ee9c n\u00e0o. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 thay \u0111\u1ed5i \u0111ang d\u1ea7n xu\u1ea5t hi\u1ec7n t\u1eeb n\u0103m 2026 tr\u1edf \u0111i.<\/p>\n<ul>\n<li><strong>Ti\u1ebfp t\u1ee5c h\u1ee3p nh\u1ea5t h\u1ec7 m\u00e9t trong chu\u1ed7i cung \u1ee9ng to\u00e0n c\u1ea7u.<\/strong> Khi chu\u1ed7i cung \u1ee9ng s\u1ea3n xu\u1ea5t to\u00e0n c\u1ea7u h\u00f3a, ng\u00e0y c\u00e0ng nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ea1i Vi\u1ec7t Nam ch\u1ec9 \u0111\u1ecbnh s\u1eed d\u1ee5ng ren h\u1ec7 m\u00e9t tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng m\u1edbi \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c t\u00ecm ngu\u1ed3n cung \u1ee9ng tr\u00ean nhi\u1ec1u khu v\u1ef1c, ngay c\u1ea3 khi c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m c\u0169 v\u1eabn d\u00f9ng h\u1ec7 inch.<\/li>\n<li><strong>Y\u00eau c\u1ea7u dung sai ch\u1eb7t ch\u1ebd h\u01a1n t\u1eeb ng\u00e0nh xe \u0111i\u1ec7n v\u00e0 h\u1ea1 t\u1ea7ng 5G.<\/strong> M\u00f4i tr\u01b0\u1eddng rung \u0111\u1ed9ng cao (v\u1ecf pin xe \u0111i\u1ec7n, gi\u00e1 \u0111\u1ee1 \u0103ng-ten 5G, \u0111\u01b0\u1eddng s\u1eaft cao t\u1ed1c) \u0111ang th\u00fac \u0111\u1ea9y nhi\u1ec1u ti\u00eau chu\u1ea9n chuy\u1ec3n sang Class 3A\/3B v\u00e0 6g\/6H nh\u01b0 ti\u00eau chu\u1ea9n thay v\u00ec cao c\u1ea5p.<\/li>\n<li><strong>Bu l\u00f4ng th\u00f4ng minh v\u00e0 c\u00f3 c\u1ea3m bi\u1ebfn.<\/strong> Bu l\u00f4ng t\u00edch h\u1ee3p c\u1ea3m bi\u1ebfn l\u1ef1c ho\u1eb7c th\u1ebb RFID \u0111\u1ec3 theo d\u00f5i b\u1ea3o tr\u00ec \u0111ang chuy\u1ec3n t\u1eeb \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t sang h\u1ea1 t\u1ea7ng c\u00f4ng nghi\u1ec7p, m\u1eb7c d\u00f9 h\u00ecnh d\u1ea1ng ren c\u01a1 b\u1ea3n v\u1eabn gi\u1eef nguy\u00ean. Thi\u1ebft b\u1ecb \u0111o n\u1eb1m \u1edf \u0111\u1ea7u ho\u1eb7c th\u00e2n bu l\u00f4ng, kh\u00f4ng ph\u1ea3i \u1edf h\u00ecnh d\u1ea1ng ren.<\/li>\n<\/ul>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft c\u00e1ch nh\u1eefng thay \u0111\u1ed5i n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c lo\u1ea1i ren li\u00ean quan nh\u1ea5t \u0111\u1ebfn ng\u01b0\u1eddi mua c\u00f4ng nghi\u1ec7p.<\/p>\n<table>\n<thead>\n<tr>\n<th>Xu h\u01b0\u1edbng<\/th>\n<th>Ng\u01b0\u1eddi \u0111i\u1ec1u khi\u1ec3n<\/th>\n<th>T\u00e1c \u0111\u1ed9ng th\u1ef1c ti\u1ec5n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ti\u00eau chu\u1ea9n h\u00f3a h\u1ec7 m\u00e9t<\/td>\n<td>\u0110\u01a1n gi\u1ea3n h\u00f3a chu\u1ed7i cung \u1ee9ng to\u00e0n c\u1ea7u<\/td>\n<td>Nhi\u1ec1u chi ti\u1ebft UNC c\u0169 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng h\u1ec7 m\u00e9t khi thi\u1ebft k\u1ebf l\u1ea1i<\/td>\n<\/tr>\n<tr>\n<td>M\u1eb7c \u0111\u1ecbnh dung sai ch\u1eb7t ch\u1ebd h\u01a1n<\/td>\n<td>T\u0103ng tr\u01b0\u1edfng h\u1ea1 t\u1ea7ng xe \u0111i\u1ec7n, 5G, \u0111\u01b0\u1eddng s\u1eaft<\/td>\n<td>6g\/6H v\u00e0 3A\/3B \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh th\u01b0\u1eddng xuy\u00ean h\u01a1n l\u00e0m ti\u00eau chu\u1ea9n c\u01a1 b\u1ea3n<\/td>\n<\/tr>\n<tr>\n<td>Bu l\u00f4ng c\u00f3 c\u1ea3m bi\u1ebfn<\/td>\n<td>Nhu c\u1ea7u b\u1ea3o tr\u00ec d\u1ef1 \u0111o\u00e1n<\/td>\n<td>H\u00ecnh d\u1ea1ng ren kh\u00f4ng thay \u0111\u1ed5i; t\u00edch h\u1ee3p c\u1ea3m bi\u1ebfn v\u00e0o \u0111\u1ea7u bul\u00f4ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Theo m\u1ed9t <a href=\"https:\/\/www.reddit.com\/r\/manufacturing\/comments\/11sylpn\/unf_vs_unc_screws\/\" target=\"_blank\" rel=\"noopener\">Th\u1ea3o lu\u1eadn tr\u00ean Reddit gi\u1eefa c\u00e1c th\u1ee3 c\u01a1 kh\u00ed \u0111ang l\u00e0m vi\u1ec7c so s\u00e1nh vi\u1ec7c s\u1eed d\u1ee5ng UNF v\u00e0 UNC<\/a>, s\u1edf th\u00edch th\u1ef1c t\u1ebf gi\u1eefa ren m\u1ecbn v\u00e0 ren th\u00f4 t\u1ea1i c\u00e1c x\u01b0\u1edfng \u1edf Vi\u1ec7t Nam v\u1eabn ph\u00e2n chia r\u00f5 r\u1ec7t theo ng\u00e0nh: \u00f4 t\u00f4 v\u00e0 s\u00fang nghi\u00eang v\u1ec1 UNF, gia c\u00f4ng t\u1ed5ng h\u1ee3p nghi\u00eang v\u1ec1 UNC, v\u00e0 m\u00f4 h\u00ecnh n\u00e0y h\u1ea7u nh\u01b0 kh\u00f4ng thay \u0111\u1ed5i ngay c\u1ea3 khi vi\u1ec7c \u00e1p d\u1ee5ng h\u1ec7 m\u00e9t ng\u00e0y c\u00e0ng t\u0103ng.<\/p>\n<p><img decoding=\"async\" alt=\"c\u00e1c lo\u1ea1i ren: nhi\u1ec1u lo\u1ea1i ch\u1ed1t v\u00e0 bu l\u00f4ng h\u1ec7 m\u00e9t v\u00e0 h\u1ec7 inch \u0111\u00e3 ho\u00e0n thi\u1ec7n, s\u1eb5n s\u00e0ng giao h\u00e0ng\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/06\/types-of-threads-closing.png\" \/><\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p><strong>C\u00f3 c\u00e1c lo\u1ea1i ren kh\u00e1c nhau kh\u00f4ng, hay \u201cren\u201d v\u1ec1 c\u01a1 b\u1ea3n ch\u1ec9 l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n?<\/strong><br \/>\nC\u00f3, c\u00f3 h\u00e0ng ch\u1ee5c lo\u1ea1i ren ti\u00eau chu\u1ea9n h\u00f3a. C\u00e1c nh\u00f3m ch\u00ednh l\u00e0 h\u1ec7 m\u00e9t (ISO), h\u1ec7 inch th\u1ed1ng nh\u1ea5t (UNC\/UNF\/UNS), ren \u1ed1ng (NPT\/BSP), v\u00e0 c\u00e1c d\u1ea1ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 ACME, h\u00ecnh thang, v\u00e0 ren \u0111\u1ee1, m\u1ed7i lo\u1ea1i ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng vi\u1ec7c kh\u00e1c nhau.<\/p>\n<p><strong>Hai d\u1ea1ng ren ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 g\u00ec?<\/strong><br \/>\nHai d\u1ea1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 <strong>Ren ch\u1eef V 60\u00b0<\/strong> (bao g\u1ed3m h\u1ec7 m\u00e9t ISO v\u00e0 h\u1ec7 th\u1ed1ng UNC\/UNF, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean ph\u1ea7n l\u1edbn c\u00e1c lo\u1ea1i bul\u00f4ng, \u0111ai \u1ed1c) v\u00e0 <strong>Ren \u1ed1ng c\u00f4n<\/strong> (NPT\/BSPT, d\u00f9ng cho c\u00e1c k\u1ebft n\u1ed1i k\u00edn \u00e1p su\u1ea5t trong h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc v\u00e0 kh\u00ed n\u00e9n).<\/p>\n<p><strong>Bu l\u00f4ng h\u1ec7 m\u00e9t c\u00f3 l\u1eafp v\u1eeba v\u00e0o l\u1ed7 ren h\u1ec7 inch kh\u00f4ng?<\/strong><br \/>\n\u0110\u00f4i khi c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u v\u1eb7n v\u00e0o, nh\u01b0ng s\u1ebd kh\u00f4ng kh\u1edbp \u0111\u00fang. M8 x 1.25 v\u00e0 5\/16\u2033-18 UNC c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ea7n gi\u1ed1ng nhau n\u00ean bu l\u00f4ng h\u1ec7 m\u00e9t c\u00f3 th\u1ec3 v\u1eb7n ch\u00e9o v\u00e0o \u0111ai \u1ed1c UNC v\u00e0i v\u00f2ng tr\u01b0\u1edbc khi b\u1ecb k\u1eb9t. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y tu\u1ed9t ren t\u1ea1i c\u00e1c x\u01b0\u1edfng s\u1eed d\u1ee5ng h\u1ed7n h\u1ee3p.<\/p>\n<p><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ren UNC v\u00e0 UNF l\u00e0 g\u00ec?<\/strong><br \/>\nUNC (th\u00f4) c\u00f3 \u00edt ren h\u01a1n, s\u00e2u h\u01a1n tr\u00ean m\u1ed7i inch v\u00e0 l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh \u0111a d\u1ee5ng. UNF (m\u1ecbn) c\u00f3 nhi\u1ec1u ren h\u01a1n tr\u00ean m\u1ed7i inch, gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng rung v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u00f5i l\u1edbn h\u01a1n, nh\u01b0ng \u0111\u1ed5i l\u1ea1i l\u1eafp r\u00e1p ch\u1eadm h\u01a1n v\u00e0 d\u1ec5 b\u1ecb ch\u00e9o ren h\u01a1n.<\/p>\n<p><strong>T\u00f4i c\u00f3 c\u1ea7n d\u00f9ng keo l\u00e0m k\u00edn ren cho kh\u1edbp n\u1ed1i NPT kh\u00f4ng?<\/strong><br \/>\nRen NPT ti\u00eau chu\u1ea9n kh\u00f4ng t\u1ef1 l\u00e0m k\u00edn kim lo\u1ea1i v\u1edbi kim lo\u1ea1i v\u00e0 th\u01b0\u1eddng c\u1ea7n b\u0103ng PTFE ho\u1eb7c keo l\u00e0m k\u00edn \u1ed1ng. Ren NPTF (Dryseal) \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi dung sai ch\u1eb7t ch\u1ebd h\u01a1n \u0111\u1ec3 t\u1ef1 l\u00e0m k\u00edn m\u00e0 kh\u00f4ng c\u1ea7n keo b\u1ed5 sung, m\u1eb7c d\u00f9 nhi\u1ec1u th\u1ee3 l\u1eafp \u0111\u1eb7t v\u1eabn th\u00eam keo nh\u01b0 bi\u1ec7n ph\u00e1p d\u1ef1 ph\u00f2ng.<\/p>\n<p><strong>L\u00e0m sao \u0111\u1ec3 bi\u1ebft ren l\u00e0 ren tr\u00e1i hay ren ph\u1ea3i?<\/strong><br \/>\nRen ph\u1ea3i si\u1ebft theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 v\u00e0 chi\u1ebfm \u0111a s\u1ed1 c\u00e1c lo\u1ea1i bu l\u00f4ng, \u0111ai \u1ed1c. Ren tr\u00e1i, d\u00f9ng trong tr\u01b0\u1eddng h\u1ee3p xoay c\u00f3 th\u1ec3 l\u00e0m l\u1ecfng bu l\u00f4ng (nh\u01b0 b\u00e0n \u0111\u1ea1p tr\u00e1i c\u1ee7a xe \u0111\u1ea1p), th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u \u201cLH\u201d ho\u1eb7c c\u00f3 r\u00e3nh c\u1eaft quanh \u0111\u1ea7u ho\u1eb7c th\u00e2n.<\/p>\n<p><strong>Lo\u1ea1i ren n\u00e0o ph\u00f9 h\u1ee3p nh\u1ea5t cho h\u1ed9p nh\u1ef1a?<\/strong><br \/>\nV\u00edt t\u1ef1 t\u1ea1o ren (kh\u00f4ng ph\u1ea3i v\u00edt c\u1eaft ren), c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p v\u1edbi \u0111\u01b0\u1eddng k\u00ednh g\u1edd nh\u1ecf h\u01a1n m\u1ed9t ch\u00fat. Lo\u1ea1i v\u00edt n\u00e0y l\u00e0m bi\u1ebfn d\u1ea1ng thay v\u00ec c\u1eaft v\u1eadt li\u1ec7u, tr\u00e1nh t\u1eadp trung \u1ee9ng su\u1ea5t g\u00e2y n\u1ee9t quanh g\u1edd v\u00edt.<\/p>\n<p><strong>T\u1ea1i sao l\u00f4 bu l\u00f4ng m\u1edbi c\u1ee7a t\u00f4i c\u1ea3m gi\u00e1c l\u1ecfng h\u01a1n l\u00f4 tr\u01b0\u1edbc, d\u00f9 k\u00edch th\u01b0\u1edbc gi\u1ed1ng nhau?<\/strong><br \/>\nNguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5p dung sai, v\u00ed d\u1ee5 chuy\u1ec3n t\u1eeb 6g sang 8g (h\u1ec7 m\u00e9t) ho\u1eb7c t\u1eeb Class 2A sang Class 1A (h\u1ec7 inch). K\u00edch th\u01b0\u1edbc danh ngh\u0129a gi\u1ed1ng nhau, nh\u01b0ng khe h\u1edf cho ph\u00e9p \u0111\u00e3 thay \u0111\u1ed5i. Lu\u00f4n ch\u1ec9 r\u00f5 c\u1ea5p dung sai tr\u00ean b\u1ea3n v\u1ebd, kh\u00f4ng ch\u1ec9 ghi k\u00edch th\u01b0\u1edbc danh ngh\u0129a.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>C\u00e1c lo\u1ea1i ren hi\u1ec7n nay l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a h\u01a1n m\u1ed9t th\u1ebf k\u1ef7 ti\u00eau chu\u1ea9n h\u00f3a, v\u00e0 khi b\u1ea1n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nh\u00f3m ren (h\u1ec7 m\u00e9t, h\u1ec7 th\u1ed1ng th\u1ed1ng nh\u1ea5t, ren \u1ed1ng ho\u1eb7c chuy\u00ean d\u1ee5ng), h\u1ea7u h\u1ebft c\u00e1c c\u00e2u h\u1ecfi th\u1ef1c t\u1ebf (d\u00f9ng taro n\u00e0o, c\u00f3 c\u1ea7n keo l\u00e0m k\u00edn kh\u00f4ng, ch\u1ec9 \u0111\u1ecbnh dung sai n\u00e0o) s\u1ebd t\u1ef1 \u0111\u1ed9ng c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi. Trong t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i ren \u0111\u00e3 \u0111\u1ec1 c\u1eadp, lo\u1ea1i \u00edt g\u00e2y r\u1eafc r\u1ed1i nh\u1ea5t l\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u0111\u1ea7y \u0111\u1ee7: nh\u00f3m ren, b\u01b0\u1edbc ren v\u00e0 c\u1ea5p dung sai, m\u1ed7i l\u1ea7n \u0111\u1ec1u ph\u1ea3i r\u00f5 r\u00e0ng. \u0110\u1ed1ng bu l\u00f4ng h\u1ed7n h\u1ee3p ban \u0111\u1ea7u \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i trong kho\u1ea3ng m\u01b0\u1eddi l\u0103m ph\u00fat khi ch\u00fang t\u00f4i \u0111o \u0111\u01b0\u1eddng k\u00ednh l\u1edbn, ki\u1ec3m tra b\u01b0\u1edbc ren v\u00e0 ki\u1ec3m tra \u0111\u1ed9 c\u00f4n nhanh.<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111ang ch\u1ec9 \u0111\u1ecbnh bu l\u00f4ng cho m\u1ed9t c\u1ee5m l\u1eafp r\u00e1p m\u1edbi, khuy\u1ebfn ngh\u1ecb c\u1ee7a ch\u00fang t\u00f4i r\u1ea5t \u0111\u01a1n gi\u1ea3n: ch\u1ecdn nh\u00f3m ren ph\u00f9 h\u1ee3p v\u1edbi chu\u1ed7i cung \u1ee9ng v\u00e0 khu v\u1ef1c c\u1ee7a b\u1ea1n tr\u01b0\u1edbc, m\u1eb7c \u0111\u1ecbnh ch\u1ecdn b\u01b0\u1edbc ren th\u00f4 tr\u1eeb khi c\u1ea7n ch\u1ed1ng rung th\u00ec m\u1edbi d\u00f9ng b\u01b0\u1edbc ren m\u1ecbn, v\u00e0 lu\u00f4n ghi c\u1ea5p dung sai tr\u00ean b\u1ea3n v\u1ebd d\u00f9 c\u1ea3m th\u1ea5y d\u01b0 th\u1eeba. \u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 k\u00edch th\u01b0\u1edbc h\u1ec7 m\u00e9t, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/productionscrews.com\/vi\/metric-thread\/\" target=\"_blank\">ti\u00eau chu\u1ea9n ren h\u1ec7 m\u00e9t v\u00e0 b\u01b0\u1edbc ren<\/a>, v\u00e0 \u0111\u1ec3 ch\u1ecdn bu l\u00f4ng t\u1ed5ng qu\u00e1t cho c\u1ea3 h\u1ec7 m\u00e9t v\u00e0 h\u1ec7 inch, h\u00e3y tham kh\u1ea3o <a href=\"https:\/\/productionscrews.com\/vi\/screw-and-bolt\/\" target=\"_blank\">h\u01b0\u1edbng d\u1eabn ch\u1ecdn v\u00edt v\u00e0 bu l\u00f4ng<\/a> bao qu\u00e1t to\u00e0n b\u1ed9 c\u00e2y quy\u1ebft \u0111\u1ecbnh. N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n y\u00eau c\u1ea7u th\u00f4ng s\u1ed1 ren \u0111\u1eb7c bi\u1ec7t (b\u01b0\u1edbc ren l\u1ea1, c\u1ea5p dung sai ho\u1eb7c v\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t), \u0111\u1ed9i ng\u0169 <a href=\"https:\/\/productionscrews.com\/vi\/standard-custom-hardware-solutions\/\" target=\"_blank\">gi\u1ea3i ph\u00e1p ph\u1ea7n c\u1ee9ng ti\u00eau chu\u1ea9n v\u00e0 t\u00f9y ch\u1ec9nh<\/a> c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 b\u00e1o gi\u00e1 v\u00e0 s\u1ea3n xu\u1ea5t theo b\u1ea3n v\u1ebd.<\/p>\n<h2>B\u00e0i vi\u1ebft li\u00ean quan<\/h2>\n<div style=\"display:grid;grid-template-columns:1fr 1fr;gap:12px;\">\n<p><a href=\"https:\/\/productionscrews.com\/vi\/metric-thread\/\" target=\"_blank\">Ren h\u1ec7 m\u00e9t: K\u00edch th\u01b0\u1edbc, b\u01b0\u1edbc ren, ti\u00eau chu\u1ea9n v\u00e0 h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn cho n\u0103m 2026<\/a><\/p>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/screw-and-bolt\/\" target=\"_blank\">H\u01b0\u1edbng d\u1eabn v\u1ec1 v\u00edt v\u00e0 bu l\u00f4ng: C\u00e1c lo\u1ea1i, s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u1ecdn ch\u1ed1t ph\u00f9 h\u1ee3p<\/a><\/p>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/self-tapping-screws-for-plastic\/\" target=\"_blank\">V\u00edt t\u1ef1 t\u1ea1o ren cho nh\u1ef1a: H\u01b0\u1edbng d\u1eabn ch\u1ecdn l\u1ef1a &amp; l\u1eafp \u0111\u1eb7t \u0111\u1ea7y \u0111\u1ee7<\/a><\/p>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/grades-of-bolts\/\" target=\"_blank\">C\u00e1c lo\u1ea1i bu l\u00f4ng: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c l\u1edbp \u0111\u1ed9 b\u1ec1n SAE, m\u00e9t v\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 (2026)<\/a><\/p>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/double-threaded-bolt\/\" target=\"_blank\">Bu l\u00f4ng hai \u0111\u1ea7u ren: C\u00e1c lo\u1ea1i, c\u00f4ng d\u1ee5ng, k\u00edch c\u1ee1 v\u00e0 h\u01b0\u1edbng d\u1eabn mua h\u00e0ng<\/a><\/p>\n<p><a href=\"https:\/\/productionscrews.com\/vi\/standard-custom-hardware-solutions\/\" target=\"_blank\">Gi\u1ea3i ph\u00e1p ph\u1ea7n c\u1ee9ng ti\u00eau chu\u1ea9n &amp; t\u00f9y ch\u1ec9nh<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Ren c\u00f3 ba nh\u00f3m ch\u00ednh: h\u1ec7 m\u00e9t, h\u1ec7 th\u1ed1ng th\u1ed1ng nh\u1ea5t v\u00e0 h\u1ec7 \u1ed1ng, c\u00f9ng v\u1edbi c\u00e1c d\u1ea1ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 ACME v\u00e0 t\u1ef1 khoan. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ph\u00e2n bi\u1ec7t v\u00e0 l\u1ef1a ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p.<\/p>","protected":false},"author":1,"featured_media":4874,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-screws-flange-tutorial"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=4878"}],"version-history":[{"count":1,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4878\/revisions"}],"predecessor-version":[{"id":4879,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/4878\/revisions\/4879"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/4874"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=4878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=4878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=4878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}