{"id":3713,"date":"2026-05-09T14:45:32","date_gmt":"2026-05-09T14:45:32","guid":{"rendered":"https:\/\/productionscrews.com\/unf-thread\/"},"modified":"2026-05-09T15:12:44","modified_gmt":"2026-05-09T15:12:44","slug":"unf-thread","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/unf-thread\/","title":{"rendered":"Ren UNF: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ti\u00eau chu\u1ea9n ren m\u1ecbn qu\u1ed1c gia th\u1ed1ng nh\u1ea5t"},"content":{"rendered":"<h1>Ren UNF: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ti\u00eau chu\u1ea9n ren m\u1ecbn qu\u1ed1c gia th\u1ed1ng nh\u1ea5t<\/h1>\n<p class=\"direct-answer\"><strong>Ren UNF (Unified National Fine) l\u00e0 lo\u1ea1i ren v\u00edt d\u1ef1a tr\u00ean h\u1ec7 inch v\u1edbi g\u00f3c 60\u00b0, c\u00f3 b\u01b0\u1edbc ren nh\u1ecf h\u01a1n UNC, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi ANSI\/ASME B1.1, \u0111o b\u1eb1ng s\u1ed1 ren tr\u00ean m\u1ed7i inch (TPI), s\u1eed d\u1ee5ng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ch\u1ed1ng rung v\u00e0 l\u1ef1c k\u1eb9p ch\u00ednh x\u00e1c cao.<\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/01-hero-11.png\" alt=\"Ren UNF \u2014 minh h\u1ecda ch\u00ednh th\u1ec3 hi\u1ec7n b\u00e0n l\u00e0m vi\u1ec7c k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed ch\u00ednh x\u00e1c v\u1edbi th\u01b0\u1edbc \u0111o ren v\u00e0 bu l\u00f4ng\" \/><\/p>\n<p>Khi kh\u00e1ch h\u00e0ng g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t b\u1ea3n v\u1ebd ghi ch\u00fa \u201c1\/4-28 UNF-2A\u201d, c\u00e1c k\u1ef9 s\u01b0 gi\u00e0u kinh nghi\u1ec7m nh\u1eadn ra ngay l\u1eadp t\u1ee9c. C\u00e1c nh\u00f3m mua h\u00e0ng v\u00e0 ng\u01b0\u1eddi m\u1edbi ti\u1ebfp c\u1eadn ti\u00eau chu\u1ea9n bulong c\u1ee7a Vi\u1ec7t Nam th\u01b0\u1eddng d\u1eebng l\u1ea1i. \u201cUNF\u201d ngh\u0129a l\u00e0 g\u00ec? N\u00f3 kh\u00e1c g\u00ec so v\u1edbi UNC, BSP ho\u1eb7c NPT? K\u00edch th\u01b0\u1edbc n\u00e0o b\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n, v\u00e0 n\u00ean ch\u1ec9 \u0111\u1ecbnh c\u1ea5p dung sai n\u00e0o?<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y tr\u1ea3 l\u1eddi t\u1ea5t c\u1ea3 nh\u1eefng c\u00e2u h\u1ecfi \u0111\u00f3. B\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea3ng tra c\u1ee9u ren UNF \u0111\u1ea7y \u0111\u1ee7 c\u1ea3 \u0111\u01a1n v\u1ecb inch v\u00e0 mm, so s\u00e1nh r\u00f5 r\u00e0ng v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n c\u1ea1nh tranh, th\u1ef1c ti\u1ec5n <a href=\"https:\/\/productionscrews.com\/vi\/nut-vs-bolt\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"944\">\u1ee9ng d\u1ee5ng trong ng\u00e0nh<\/a> v\u00ed d\u1ee5, v\u00e0 h\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 t\u00ecm ngu\u1ed3n cung c\u1ea5p bulong ren UNF.<\/p>\n<hr \/>\n<h2>Ren UNF l\u00e0 g\u00ec?<\/h2>\n<p><strong>Ren UNF l\u00e0 lo\u1ea1i ren Unified National Fine \u2014 ren v\u00edt h\u1ec7 inch v\u1edbi g\u00f3c 60\u00b0 v\u00e0 b\u01b0\u1edbc ren nh\u1ecf h\u01a1n Unified National Coarse (UNC), \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a theo ANSI\/ASME B1.1 v\u00e0 s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh h\u00e0ng kh\u00f4ng, \u00f4 t\u00f4 v\u00e0 s\u1ea3n xu\u1ea5t ch\u00ednh x\u00e1c.<\/strong><\/p>\n<p>\u201cUnified\u201d trong UNF \u0111\u1ec1 c\u1eadp \u0111\u1ebfn th\u1ecfa thu\u1eadn chu\u1ea9n h\u00f3a ba qu\u1ed1c gia gi\u1eefa Vi\u1ec7t Nam, Canada v\u00e0 V\u01b0\u01a1ng qu\u1ed1c Anh \u0111\u01b0\u1ee3c ho\u00e0n thi\u1ec7n v\u00e0o nh\u1eefng n\u0103m 1940. Tr\u01b0\u1edbc th\u1ecfa thu\u1eadn n\u00e0y, ren American National v\u00e0 ren British Standard Whitworth kh\u00f4ng t\u01b0\u01a1ng th\u00edch \u2014 g\u00e2y ra v\u1ea5n \u0111\u1ec1 l\u1edbn cho h\u1eadu c\u1ea7n th\u1eddi chi\u1ebfn. Chu\u1ea9n th\u1ed1ng nh\u1ea5t \u0111\u00e3 gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp g\u00f3c ren chung 60\u00b0 v\u00e0 gi\u00e1 tr\u1ecb TPI chu\u1ea9n h\u00f3a. \u201cFine\u201d ph\u00e2n bi\u1ec7t v\u1edbi UNC: c\u00f9ng g\u00f3c, kh\u00e1c b\u01b0\u1edbc ren.<\/p>\n<p>Theo <a href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Thread_Standard\" target=\"_blank\" rel=\"noopener\">Ti\u00eau chu\u1ea9n Unified Thread \u0111\u01b0\u1ee3c ghi nh\u1eadn b\u1edfi Hi\u1ec7p h\u1ed9i K\u1ef9 s\u01b0 C\u01a1 kh\u00ed Vi\u1ec7t Nam v\u00e0 tham kh\u1ea3o t\u1ea1i Wikipedia<\/a>, d\u00f2ng UNF l\u00e0 m\u1ed9t trong hai d\u00f2ng ch\u00ednh c\u1ee7a h\u1ecd ren Unified National, bao g\u1ed3m c\u00e1c k\u00edch th\u01b0\u1edbc s\u1ed1 t\u1eeb #0 \u0111\u1ebfn #12 v\u00e0 c\u00e1c k\u00edch th\u01b0\u1edbc ph\u00e2n s\u1ed1 t\u1eeb 1\/4 inch \u0111\u1ebfn 1-1\/2 inch v\u00e0 l\u1edbn h\u01a1n.<\/p>\n<h3>H\u00ecnh h\u1ecdc ren v\u00e0 g\u00f3c 60\u00b0<\/h3>\n<p>M\u1ed7i ren UNF \u0111\u1ec1u c\u00f3 g\u00f3c 60\u00b0 gi\u1eefa c\u00e1c m\u1eb7t ren. H\u00ecnh h\u1ecdc n\u00e0y x\u00e1c \u0111\u1ecbnh s\u1ef1 ph\u00e2n b\u1ed1 l\u1ef1c tr\u00ean c\u00e1c ren gh\u00e9p v\u00e0 ki\u1ec3m so\u00e1t c\u00e1ch m\u00f4-men xo\u1eafn chuy\u1ec3n th\u00e0nh l\u1ef1c k\u1eb9p. C\u00e1c th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc ch\u00ednh:<\/p>\n<ul>\n<li><strong>G\u00f3c ren:<\/strong> G\u00f3c 60\u00b0 (30\u00b0 m\u1ed7i m\u1eb7t t\u1eeb ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c)<\/li>\n<li><strong>H\u00ecnh d\u1ea1ng ren:<\/strong> \u0110\u1ec9nh ph\u1eb3ng tr\u00ean ren ngo\u00e0i; ch\u00e2n ren tr\u00f2n ho\u1eb7c ph\u1eb3ng tr\u00ean ren trong<\/li>\n<li><strong>B\u01b0\u1edbc ren (P):<\/strong> Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh ren li\u1ec1n k\u1ec1 \u2014 bi\u1ec3u th\u1ecb b\u1eb1ng 1\/TPI theo \u0111\u01a1n v\u1ecb inch<\/li>\n<li><strong>D\u1eabn h\u01b0\u1edbng:<\/strong> B\u1eb1ng v\u1edbi b\u01b0\u1edbc ren \u0111\u1ed1i v\u1edbi ren m\u1ed9t \u0111\u1ea7u \u2014 ti\u1ebfn tuy\u1ebfn t\u00ednh m\u1ed7i v\u00f2ng quay \u0111\u1ea7y \u0111\u1ee7<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn:<\/strong> \u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u00f9ng, d\u00f9ng l\u00e0m k\u00edch th\u01b0\u1edbc danh \u0111\u1ecbnh<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf (g\u1ed1c):<\/strong> \u0110\u01b0\u1eddng k\u00ednh trong c\u00f9ng \u2014 quan tr\u1ecdng \u0111\u1ec3 ch\u1ecdn k\u00edch th\u01b0\u1edbc m\u0169i khoan ren<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc:<\/strong> \u0110\u01b0\u1eddng k\u00ednh t\u01b0\u1edfng t\u01b0\u1ee3ng n\u01a1i \u0111\u1ed9 d\u00e0y c\u1ee7a ren b\u1eb1ng kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c ren<\/li>\n<\/ul>\n<p>So v\u1edbi UNC, ren m\u1ecbn c\u00f3 gi\u00e1 tr\u1ecb b\u01b0\u1edbc nh\u1ecf h\u01a1n \u2014 nhi\u1ec1u \u0111\u1ec9nh ren tr\u00ean m\u1ed7i inch ti\u1ebfp x\u00fac c\u00f9ng chi\u1ec1u d\u00e0i k\u1eb9p. S\u1ef1 ti\u1ebfp x\u00fac b\u1ec1 m\u1eb7t t\u0103ng l\u00ean n\u00e0y l\u00e0 l\u00fd do v\u00ec sao bul\u00f4ng ren UNF ch\u1ed1ng l\u1ecfng do rung \u0111\u1ed9ng t\u1ed1t h\u01a1n bul\u00f4ng UNC t\u01b0\u01a1ng \u0111\u01b0\u01a1ng trong c\u00f9ng \u0111i\u1ec1u ki\u1ec7n.<\/p>\n<h3>C\u00e1ch \u0111\u1ecdc k\u00fd hi\u1ec7u ren UNF<\/h3>\n<p>M\u1ed9t k\u00fd hi\u1ec7u ren UNF \u0111\u1ea7y \u0111\u1ee7 theo \u0111\u1ecbnh d\u1ea1ng ti\u00eau chu\u1ea9n sau:<\/p>\n<p><strong>K\u00edch th\u01b0\u1edbc danh \u0111\u1ecbnh \u2014 TPI TI\u00caU CHU\u1ea8N REN \u2014 L\u1edaP<\/strong><\/p>\n<p>V\u00ed d\u1ee5: <code>1\/4-28 UNF-2A<\/code><\/p>\n<p>Ph\u00e2n t\u00edch:<br \/>\n&#8211; <strong>1\/4<\/strong> \u2014 \u0110\u01b0\u1eddng k\u00ednh l\u1edbn danh \u0111\u1ecbnh (0.250 inch)<br \/>\n&#8211; <strong>28<\/strong> \u2014 S\u1ed1 ren tr\u00ean m\u1ed7i inch (TPI)<br \/>\n&#8211; <strong>UNF<\/strong> \u2014 Ti\u00eau chu\u1ea9n ren m\u1ecbn qu\u1ed1c gia th\u1ed1ng nh\u1ea5t<br \/>\n&#8211; <strong>2A<\/strong> \u2014 L\u1edbp ren (A = ren ngo\u00e0i\/bul\u00f4ng; 2 = dung sai k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n)<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u00e1nh s\u1ed1 nh\u1ecf h\u01a1n 1\/4 inch, k\u00edch th\u01b0\u1edbc danh \u0111\u1ecbnh \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng s\u1ed1 (#0 \u0111\u1ebfn #12):<\/p>\n<p><code>#10-32 UNF-2B<\/code><\/p>\n<p>\u1ede \u0111\u00e2y: #10 = \u0111\u01b0\u1eddng k\u00ednh l\u1edbn danh \u0111\u1ecbnh 0.190 inch; 32 TPI; ti\u00eau chu\u1ea9n UNF; l\u1edbp 2B (B = ren trong\/\u0111ai \u1ed1c).<\/p>\n<hr \/>\n<h2>K\u00edch th\u01b0\u1edbc, th\u00f4ng s\u1ed1 v\u00e0 b\u1ea3ng \u0111\u1ea7y \u0111\u1ee7 ren UNF<\/h2>\n<p><strong>Ren UNF c\u00f3 d\u1ea3i t\u1eeb #0 (0.060 inch, 80 TPI) \u0111\u1ebfn 1-1\/2 inch (12 TPI), v\u1edbi b\u01b0\u1edbc ren nh\u1ecf h\u01a1n \u1edf m\u1ed7i \u0111\u01b0\u1eddng k\u00ednh so v\u1edbi k\u00edch th\u01b0\u1edbc UNC t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/strong><\/p>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ti\u00eau chu\u1ea9n \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ren UNF, bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c k\u00edch th\u01b0\u1edbc ph\u1ed5 bi\u1ebfn v\u1edbi c\u1ea3 k\u00edch th\u01b0\u1edbc inch v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u00e9t \u2014 l\u1ea5p \u0111\u1ea7y kho\u1ea3ng tr\u1ed1ng m\u00e0 h\u1ea7u h\u1ebft c\u00e1c \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh b\u1ecf qua.<\/p>\n<p><strong>B\u1ea3ng 1: K\u00edch th\u01b0\u1edbc ren UNF \u2014 B\u1ea3ng \u0111\u1ea7y \u0111\u1ee7 (Inch v\u00e0 mm)<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>K\u00edch th\u01b0\u1edbc danh ngh\u0129a<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn (in)<\/th>\n<th>TPI<\/th>\n<th>B\u01b0\u1edbc ren (in)<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren (in)<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf ngo\u00e0i (in)<\/th>\n<th>B\u01b0\u1edbc (mm)<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>#0<\/td>\n<td>0.0600<\/td>\n<td>80<\/td>\n<td>0.01250<\/td>\n<td>0.0519<\/td>\n<td>0.0438<\/td>\n<td>0.318<\/td>\n<td>1.524<\/td>\n<\/tr>\n<tr>\n<td>#1<\/td>\n<td>0.0730<\/td>\n<td>72<\/td>\n<td>0.01389<\/td>\n<td>0.0640<\/td>\n<td>0.0550<\/td>\n<td>0.353<\/td>\n<td>1.854<\/td>\n<\/tr>\n<tr>\n<td>#2<\/td>\n<td>0.0860<\/td>\n<td>64<\/td>\n<td>0.01563<\/td>\n<td>0.0759<\/td>\n<td>0.0657<\/td>\n<td>0.397<\/td>\n<td>2.184<\/td>\n<\/tr>\n<tr>\n<td>#3<\/td>\n<td>0.0990<\/td>\n<td>56<\/td>\n<td>0.01786<\/td>\n<td>0.0874<\/td>\n<td>0.0758<\/td>\n<td>0.454<\/td>\n<td>2.515<\/td>\n<\/tr>\n<tr>\n<td>#4<\/td>\n<td>0.1120<\/td>\n<td>48<\/td>\n<td>0.02083<\/td>\n<td>0.0985<\/td>\n<td>0.0849<\/td>\n<td>0.529<\/td>\n<td>2.845<\/td>\n<\/tr>\n<tr>\n<td>#5<\/td>\n<td>0.1250<\/td>\n<td>44<\/td>\n<td>0.02273<\/td>\n<td>0.1102<\/td>\n<td>0.0955<\/td>\n<td>0.577<\/td>\n<td>3.175<\/td>\n<\/tr>\n<tr>\n<td>#6<\/td>\n<td>0.1380<\/td>\n<td>40<\/td>\n<td>0.02500<\/td>\n<td>0.1218<\/td>\n<td>0.1055<\/td>\n<td>0.635<\/td>\n<td>3.505<\/td>\n<\/tr>\n<tr>\n<td>#8<\/td>\n<td>0.1640<\/td>\n<td>36<\/td>\n<td>0.02778<\/td>\n<td>0.1460<\/td>\n<td>0.1279<\/td>\n<td>0.706<\/td>\n<td>4.166<\/td>\n<\/tr>\n<tr>\n<td>#10<\/td>\n<td>0.1900<\/td>\n<td>32<\/td>\n<td>0.03125<\/td>\n<td>0.1697<\/td>\n<td>0.1494<\/td>\n<td>0.794<\/td>\n<td>4.826<\/td>\n<\/tr>\n<tr>\n<td>#12<\/td>\n<td>0.2160<\/td>\n<td>28<\/td>\n<td>0.03571<\/td>\n<td>0.1928<\/td>\n<td>0.1696<\/td>\n<td>0.907<\/td>\n<td>5.486<\/td>\n<\/tr>\n<tr>\n<td>1\/4<\/td>\n<td>0.2500<\/td>\n<td>28<\/td>\n<td>0.03571<\/td>\n<td>0.2268<\/td>\n<td>0.2036<\/td>\n<td>0.907<\/td>\n<td>6.350<\/td>\n<\/tr>\n<tr>\n<td>5\/16<\/td>\n<td>0.3125<\/td>\n<td>24<\/td>\n<td>0.04167<\/td>\n<td>0.2854<\/td>\n<td>0.2584<\/td>\n<td>1.058<\/td>\n<td>7.938<\/td>\n<\/tr>\n<tr>\n<td>3\/8<\/td>\n<td>0.3750<\/td>\n<td>24<\/td>\n<td>0.04167<\/td>\n<td>0.3479<\/td>\n<td>0.3209<\/td>\n<td>1.058<\/td>\n<td>9.525<\/td>\n<\/tr>\n<tr>\n<td>7\/16<\/td>\n<td>0.4375<\/td>\n<td>20<\/td>\n<td>0.05000<\/td>\n<td>0.4050<\/td>\n<td>0.3726<\/td>\n<td>1.270<\/td>\n<td>11.113<\/td>\n<\/tr>\n<tr>\n<td>1\/2<\/td>\n<td>0.5000<\/td>\n<td>20<\/td>\n<td>0.05000<\/td>\n<td>0.4675<\/td>\n<td>0.4351<\/td>\n<td>1.270<\/td>\n<td>12.700<\/td>\n<\/tr>\n<tr>\n<td>9\/16<\/td>\n<td>0.5625<\/td>\n<td>18<\/td>\n<td>0.05556<\/td>\n<td>0.5264<\/td>\n<td>0.4903<\/td>\n<td>1.411<\/td>\n<td>14.288<\/td>\n<\/tr>\n<tr>\n<td>5\/8<\/td>\n<td>0.6250<\/td>\n<td>18<\/td>\n<td>0.05556<\/td>\n<td>0.5889<\/td>\n<td>0.5528<\/td>\n<td>1.411<\/td>\n<td>15.875<\/td>\n<\/tr>\n<tr>\n<td>3\/4<\/td>\n<td>0.7500<\/td>\n<td>16<\/td>\n<td>0.06250<\/td>\n<td>0.7094<\/td>\n<td>0.6688<\/td>\n<td>1.588<\/td>\n<td>19.050<\/td>\n<\/tr>\n<tr>\n<td>7\/8<\/td>\n<td>0.8750<\/td>\n<td>14<\/td>\n<td>0.07143<\/td>\n<td>0.8286<\/td>\n<td>0.7822<\/td>\n<td>1.814<\/td>\n<td>22.225<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>1.0000<\/td>\n<td>12<\/td>\n<td>0.08333<\/td>\n<td>0.9459<\/td>\n<td>0.8917<\/td>\n<td>2.117<\/td>\n<td>25.400<\/td>\n<\/tr>\n<tr>\n<td>1-1\/8<\/td>\n<td>1.1250<\/td>\n<td>12<\/td>\n<td>0.08333<\/td>\n<td>1.0709<\/td>\n<td>1.0167<\/td>\n<td>2.117<\/td>\n<td>28.575<\/td>\n<\/tr>\n<tr>\n<td>1-1\/4<\/td>\n<td>1.2500<\/td>\n<td>12<\/td>\n<td>0.08333<\/td>\n<td>1.1959<\/td>\n<td>1.1417<\/td>\n<td>2.117<\/td>\n<td>31.750<\/td>\n<\/tr>\n<tr>\n<td>1-3\/8<\/td>\n<td>1.3750<\/td>\n<td>12<\/td>\n<td>0.08333<\/td>\n<td>1.3209<\/td>\n<td>1.2667<\/td>\n<td>2.117<\/td>\n<td>34.925<\/td>\n<\/tr>\n<tr>\n<td>1-1\/2<\/td>\n<td>1.5000<\/td>\n<td>12<\/td>\n<td>0.08333<\/td>\n<td>1.4459<\/td>\n<td>1.3917<\/td>\n<td>2.117<\/td>\n<td>38.100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>K\u00edch th\u01b0\u1edbc theo ti\u00eau chu\u1ea9n ren v\u00edt inch th\u1ed1ng nh\u1ea5t ANSI\/ASME B1.1.<\/em><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/02-types-6.png\" alt=\"Ren UNF \u2014 minh h\u1ecda c\u00e1c lo\u1ea1i v\u00e0 k\u00edch th\u01b0\u1edbc th\u1ec3 hi\u1ec7n s\u01a1 \u0111\u1ed3 so s\u00e1nh bi\u00ean d\u1ea1ng ren m\u1ecbn UNF v\u1edbi bi\u00ean d\u1ea1ng ren th\u00f4 UNC\" \/><\/p>\n<h3>K\u00edch th\u01b0\u1edbc ren UNF theo mm: C\u00f4ng th\u1ee9c chuy\u1ec3n \u0111\u1ed5i<\/h3>\n<p>\u0110\u1ed1i v\u1edbi mua s\u1eafm qu\u1ed1c t\u1ebf, ng\u01b0\u1eddi mua th\u01b0\u1eddng y\u00eau c\u1ea7u k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u00e9t c\u1ee7a ren UNF. Kh\u00f4ng c\u00f3 lo\u1ea1i ren ISO m\u00e9t n\u00e0o thay th\u1ebf tr\u1ef1c ti\u1ebfp \u2014 g\u00f3c 60\u00b0 v\u00e0 h\u1ec7 th\u1ed1ng TPI inch kh\u00e1c bi\u1ec7t v\u1edbi ren ISO m\u00e9t. Tuy nhi\u00ean, b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc ren t\u00ednh b\u1eb1ng mm<\/strong> = 25,4 \u00f7 TPI<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn t\u00ednh b\u1eb1ng mm<\/strong> = k\u00edch th\u01b0\u1edbc inch danh ngh\u0129a \u00d7 25,4<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5 \u2014 1\/4-28 UNF:<br \/>\n\u2013 B\u01b0\u1edbc ren = 25,4 \u00f7 28 = <strong>0,907 mm<\/strong><br \/>\n\u2013 \u0110\u01b0\u1eddng k\u00ednh l\u1edbn = 0,250 \u00d7 25,4 = <strong>6,35 mm<\/strong><\/p>\n<p>Ren ISO m\u00e9t g\u1ea7n nh\u1ea5t l\u00e0 M6\u00d71.0. M\u1eb7c d\u00f9 c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng t\u1ef1, <strong>ch\u00fang kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau<\/strong>: \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren v\u00e0 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf kh\u00e1c nhau. Lu\u00f4n s\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o ren \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n \u0111\u1ec3 ki\u1ec3m tra tr\u01b0\u1edbc khi tr\u1ed9n c\u00e1c ti\u00eau chu\u1ea9n.<\/p>\n<h3>K\u00edch th\u01b0\u1edbc m\u0169i khoan taro cho ren UNF<\/h3>\n<p>\u0110\u1ec3 gia c\u00f4ng ren trong UNF, \u0111\u01b0\u1eddng k\u00ednh m\u0169i khoan taro l\u00e0:<\/p>\n<p><strong>M\u0169i khoan taro = \u0110\u01b0\u1eddng k\u00ednh l\u1edbn \u2212 B\u01b0\u1edbc ren (cho \u0111\u1ed9 \u0103n kh\u1edbp ren kho\u1ea3ng 75%)<\/strong><\/p>\n<ul>\n<li>1\/4-28 UNF: 0,250 \u2212 0,036 = 0,214 in \u2192 d\u00f9ng m\u0169i khoan s\u1ed1 3 (0,2130 in)<\/li>\n<li>5\/16-24 UNF: 0,3125 \u2212 0,042 = 0,271 in \u2192 d\u00f9ng m\u0169i khoan I (0,2720 in)<\/li>\n<li>3\/8-24 UNF: 0,3750 \u2212 0,042 = 0,333 in \u2192 d\u00f9ng m\u0169i khoan Q (0,3320 in)<\/li>\n<li>1\/2-20 UNF: 0,5000 \u2212 0,050 = 0,450 in \u2192 d\u00f9ng m\u0169i khoan 29\/64 (0,4531 in)<\/li>\n<\/ul>\n<blockquote><p><strong>Trong th\u1ef1c t\u1ebf, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y r\u1eb1ng \u0111\u1ed9 \u0103n kh\u1edbp ren 75% l\u00e0 t\u1ed1i \u01b0u cho h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i th\u00e9p k\u1ef9 thu\u1eadt. \u0110\u1ed1i v\u1edbi nh\u00f4m ho\u1eb7c h\u1ee3p kim m\u1ec1m, \u0111\u1ed9 \u0103n kh\u1edbp ren 65\u201370% gi\u00fap gi\u1ea3m nguy c\u01a1 g\u00e3y m\u0169i taro m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u1ef1c gi\u1eef k\u00e9o.<\/strong><\/p><\/blockquote>\n<hr \/>\n<h2>\u1ee8ng d\u1ee5ng c\u00f4ng nghi\u1ec7p c\u1ee7a bulong ren UNF<\/h2>\n<p><strong>Ren UNF v\u01b0\u1ee3t tr\u1ed9i trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ea7n ch\u1ed1ng rung, l\u1ef1c k\u1eb9p ch\u00ednh x\u00e1c ho\u1eb7c h\u00ecnh h\u1ecdc th\u00e0nh m\u1ecfng khi\u1ebfn ren th\u00f4 kh\u00f4ng ph\u00f9 h\u1ee3p \u2014 ch\u1ee7 y\u1ebfu trong ng\u00e0nh h\u00e0ng kh\u00f4ng, \u00f4 t\u00f4 hi\u1ec7u su\u1ea5t cao, s\u00fang v\u00e0 thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c.<\/strong><\/p>\n<h3>H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 Qu\u1ed1c ph\u00f2ng<\/h3>\n<p>Ng\u00e0nh h\u00e0ng kh\u00f4ng l\u00e0 l\u0129nh v\u1ef1c s\u1eed d\u1ee5ng bulong ren UNF l\u1edbn nh\u1ea5t theo gi\u00e1 tr\u1ecb. H\u1ea7u h\u1ebft c\u00e1c bulong k\u1ebft c\u1ea5u khung m\u00e1y bay \u2014 t\u1eeb bulong AN (Ti\u00eau chu\u1ea9n H\u00e0ng kh\u00f4ng H\u1ea3i qu\u00e2n) \u0111\u1ebfn bulong MS (Ti\u00eau chu\u1ea9n Qu\u00e2n s\u1ef1) \u2014 \u0111\u1ec1u s\u1eed d\u1ee5ng ren UNF. L\u00fd do: m\u00e1y bay ch\u1ecbu h\u00e0ng tri\u1ec7u chu k\u1ef3 rung \u0111\u1ed9ng, v\u00e0 ren m\u1ecbn ch\u1ed1ng t\u1ef1 l\u1ecfng m\u00e0 kh\u00f4ng c\u1ea7n d\u00e2y kh\u00f3a tr\u00ean m\u1ed7i bulong.<\/p>\n<p>Ren m\u1ecbn <a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-fastener-installation-why-clamp-load-beats-torque-every-time\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"941\">bulong c\u0169ng t\u1ea1o ra l\u1ef1c k\u1eb9p cao h\u01a1n \u1edf c\u00f9ng m\u00f4-men xo\u1eafn \u00e1p d\u1ee5ng<\/a>. B\u01b0\u1edbc xo\u1eafn m\u1ecbn h\u01a1n chuy\u1ec3n \u0111\u1ed5i m\u00f4-men xo\u1eafn th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng tuy\u1ebfn t\u00ednh <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-clamping-force-test-methods-for-engineering-success\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"946\">l\u1ef1c k\u1eb9p<\/a> v\u1edbi l\u1ee3i th\u1ebf c\u01a1 h\u1ecdc l\u1edbn h\u01a1n \u2014 \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng khi bulong k\u1ebft c\u1ea5u c\u1ea7n k\u1eb9p c\u00e1c t\u1ea5m sandwich composite m\u00e0 kh\u00f4ng l\u00e0m v\u1ee1 ch\u00fang.<\/p>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng UNF \u0111i\u1ec3n h\u00ecnh trong ng\u00e0nh h\u00e0ng kh\u00f4ng:<br \/>\n&#8211; <strong>Bulong k\u1ebft c\u1ea5u khung m\u00e1y bay:<\/strong> AN3 (10-32 UNF) \u0111\u1ebfn AN20 (3\/4-16 UNF)<br \/>\n&#8211; <strong>Gi\u00e1 \u0111\u1ee1 \u0111\u1ed9ng c\u01a1 v\u00e0 gi\u00e1 ph\u1ee5 ki\u1ec7n:<\/strong> 5\/16-24 UNF \u0111\u1ebfn 1\/2-20 UNF<br \/>\n&#8211; <strong>Ph\u1ea7n c\u1ee9ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng kh\u00f4ng:<\/strong> #4-48 UNF, #6-40 UNF (\u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, \u0111\u1ed9 ch\u00ednh x\u00e1c cao)<br \/>\n&#8211; <strong>Ph\u1ee5 ki\u1ec7n h\u1ec7 th\u1ed1ng c\u00e1nh qu\u1ea1t tr\u1ef1c th\u0103ng:<\/strong> 7\/16-20 UNF, 1\/2-20 UNF \u2014 quan tr\u1ecdng v\u1ec1 rung \u0111\u1ed9ng<\/p>\n<h3>\u00d4 t\u00f4 v\u00e0 \u0110ua xe hi\u1ec7u su\u1ea5t cao<\/h3>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 hi\u1ec7u su\u1ea5t cao ch\u1ec9 \u0111\u1ecbnh s\u1eed d\u1ee5ng ren UNF thay v\u00ec UNC cho c\u00e1c b\u1ed9 ph\u1eadn quan tr\u1ecdng v\u1ec1 an to\u00e0n. Bu l\u00f4ng thanh truy\u1ec1n trong \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao th\u01b0\u1eddng d\u00f9ng UNF v\u00ec b\u01b0\u1edbc ren nh\u1ecf cho ph\u00e9p ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn v\u00e0 \u0111\u1ed9 gi\u00e3n ch\u1eb7t h\u01a1n \u2014 \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng khi bu l\u00f4ng thanh truy\u1ec1n ph\u1ea3i ch\u1ecbu t\u1ea3i g\u1ea7n 5% \u0111i\u1ec3m ch\u1ea3y m\u00e0 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1.<\/p>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng \u0111ua xe th\u01b0\u1eddng s\u1eed d\u1ee5ng ren UNF:<br \/>\n&#8211; <strong>Bu l\u00f4ng thanh truy\u1ec1n:<\/strong> #10-32 UNF \u0111\u1ebfn 7\/16-20 UNF<br \/>\n&#8211; <strong>Bu l\u00f4ng \u0111\u1ea7u xy-lanh (m\u1ed9t s\u1ed1 \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao):<\/strong> 7\/16-20 UNF, 1\/2-20 UNF<br \/>\n&#8211; <strong>\u0110\u1ea7u thanh \/ kh\u1edbp Heim trong li\u00ean k\u1ebft h\u1ec7 th\u1ed1ng treo:<\/strong> 1\/4-28 UNF \u0111\u1ebfn 5\/8-18 UNF<br \/>\n&#8211; <strong>Ph\u1ea7n c\u1ee9ng g\u1eafn k\u1eb9p phanh trong \u0111ua xe:<\/strong> 3\/8-24 UNF, 7\/16-20 UNF<\/p>\n<p>Th\u1ecb tr\u01b0\u1eddng <a href=\"https:\/\/productionscrews.com\/vi\/vehicle-threads\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"945\">bulong \u00f4 t\u00f4<\/a> to\u00e0n c\u1ea7u ch\u1ec9 ri\u00eang \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh gi\u00e1 h\u01a1n $22 t\u1ef7 \u0111\u1ed3ng v\u00e0o n\u0103m 2024, v\u1edbi c\u00e1c lo\u1ea1i bulong ren m\u1ecbn chuy\u00ean d\u1ee5ng t\u0103ng tr\u01b0\u1edfng nhanh h\u01a1n so v\u1edbi ph\u1ea7n c\u1ee9ng ti\u00eau chu\u1ea9n khi c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh \u0111i\u1ec7n h\u00f3a v\u00e0 gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng l\u00e0m t\u0103ng nhu c\u1ea7u v\u1ec1 bulong nh\u1ecf, c\u01b0\u1eddng \u0111\u1ed9 cao.<\/p>\n<h3>V\u0169 kh\u00ed v\u00e0 Thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c<\/h3>\n<p>Ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u0169 kh\u00ed \u0111\u00e3 ti\u00eau chu\u1ea9n h\u00f3a c\u00e1c k\u00edch th\u01b0\u1edbc ren UNF c\u1ee5 th\u1ec3 cho thi\u1ebft b\u1ecb \u0111\u1ea7u n\u00f2ng. Hai th\u00f4ng s\u1ed1 ren \u0111\u1ea7u n\u00f2ng ph\u1ed5 bi\u1ebfn nh\u1ea5t \u2014 <strong>1\/2-28 UNF<\/strong> (c\u1ee1 5.56mm\/.223) <strong>5\/8-24 UNF<\/strong> (c\u1ee1 .30) \u2014 l\u00e0 lo\u1ea1i ren m\u1ecbn theo thi\u1ebft k\u1ebf, cho ph\u00e9p c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c v\u00e0 l\u1eafp kh\u00edt c\u00e1c b\u1ed9 phanh mi\u1ec7ng v\u00e0 b\u1ed9 gi\u1ea3m thanh gi\u1eefa c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<p>C\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c d\u1ef1a v\u00e0o ren UNF v\u00ec l\u00fd do t\u01b0\u01a1ng t\u1ef1:<br \/>\n&#8211; <strong>Gi\u00e1 \u0111\u1ee1 quang h\u1ecdc v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh r\u00e3nh tr\u01b0\u1ee3t:<\/strong> B\u01b0\u1edbc ren nh\u1ecf cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh ch\u00ednh x\u00e1c tr\u00ean m\u1ed7i v\u00f2ng quay<br \/>\n&#8211; <strong>V\u00edt \u0111i\u1ec1u ch\u1ec9nh micrometer v\u00e0 th\u01b0\u1edbc k\u1eb9p:<\/strong> #0-80 UNF \u0111\u1ebfn #10-32 UNF<br \/>\n&#8211; <strong>Thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 ph\u1ea7n c\u1ee9ng thi\u1ebft b\u1ecb ph\u00e2n t\u00edch:<\/strong> \u0110\u1ed9 l\u1eb7p l\u1ea1i cao, \u0111\u1ed9 r\u01a1 t\u1ed1i thi\u1ec3u khi ch\u1ecbu t\u1ea3i<\/p>\n<hr \/>\n<h2>UNF vs UNC vs BSP vs NPT: B\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n lo\u1ea1i ren n\u00e0o?<\/h2>\n<p><strong>Ch\u1ecdn UNF cho kh\u1ea3 n\u0103ng ch\u1ed1ng rung, \u0111\u1ed9 ch\u00ednh x\u00e1c ho\u1eb7c l\u1eafp r\u00e1p th\u00e0nh m\u1ecfng; UNC cho l\u1eafp r\u00e1p nhanh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n; BSP cho h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c v\u00e0 ph\u1ee5 ki\u1ec7n ch\u1ea5t l\u1ecfng t\u1ea1i Anh\/Ch\u00e2u \u00c2u; NPT cho vi\u1ec7c l\u00e0m k\u00edn \u1ed1ng c\u00f4n trong h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc v\u00e0 kh\u00ed n\u00e9n t\u1ea1i Vi\u1ec7t Nam.<\/strong><\/p>\n<p>So s\u00e1nh n\u00e0y lo\u1ea1i b\u1ecf c\u00e1c l\u1ed7i th\u00f4ng s\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n<p><strong>B\u1ea3ng 2: So s\u00e1nh ti\u00eau chu\u1ea9n ren \u2014 UNF vs UNC vs BSP vs NPT<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>Ti\u00eau chu\u1ea9n<\/th>\n<th>G\u00f3c<\/th>\n<th>H\u1ec7 th\u1ed1ng<\/th>\n<th>C\u01a1 s\u1edf b\u01b0\u1edbc ren<\/th>\n<th>T\u1ef1 l\u00e0m k\u00edn<\/th>\n<th>\u1ee8ng d\u1ee5ng ch\u00ednh<\/th>\n<th>T\u01b0\u01a1ng th\u00edch v\u1edbi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>UNF<\/strong><\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>Inch<\/td>\n<td>S\u1ed1 ren\/inch (m\u1ecbn)<\/td>\n<td>No<\/td>\n<td>H\u00e0ng kh\u00f4ng, ch\u00ednh x\u00e1c, ch\u1ed1ng rung<\/td>\n<td>UNC (c\u00f9ng g\u00f3c; kh\u00e1c s\u1ed1 ren tr\u00ean inch)<\/td>\n<\/tr>\n<tr>\n<td><strong>UNC<\/strong><\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>Inch<\/td>\n<td>S\u1ed1 v\u00f2ng ren\/inch (th\u00f4)<\/td>\n<td>No<\/td>\n<td>K\u1ef9 thu\u1eadt chung, x\u00e2y d\u1ef1ng<\/td>\n<td>UNF (g\u00f3c gi\u1ed1ng nhau; s\u1ed1 v\u00f2ng ren\/inch kh\u00e1c nhau)<\/td>\n<\/tr>\n<tr>\n<td><strong>BSP (BSPP)<\/strong><\/td>\n<td>55\u00b0<\/td>\n<td>Inch<\/td>\n<td>S\u1ed1 v\u00f2ng ren\/inch<\/td>\n<td>Kh\u00f4ng (song song)<\/td>\n<td>Th\u1ee7y l\u1ef1c, \u1ed1ng n\u01b0\u1edbc Anh\/Ch\u00e2u \u00c2u<\/td>\n<td>BSPT (b\u01b0\u1edbc ren gi\u1ed1ng nhau; c\u00f4n so v\u1edbi song song)<\/td>\n<\/tr>\n<tr>\n<td><strong>BSPT<\/strong><\/td>\n<td>55\u00b0<\/td>\n<td>Inch<\/td>\n<td>S\u1ed1 v\u00f2ng ren\/inch<\/td>\n<td>C\u00f3 (c\u00f4n)<\/td>\n<td>M\u1ed1i n\u1ed1i \u1ed1ng c\u00f4n ki\u1ec3u Anh<\/td>\n<td>BSPP (c\u00f3 keo l\u00e0m k\u00edn)<\/td>\n<\/tr>\n<tr>\n<td><strong>NPT<\/strong><\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>Inch<\/td>\n<td>S\u1ed1 v\u00f2ng ren\/inch<\/td>\n<td>C\u00f3 (c\u00f4n)<\/td>\n<td>\u1ed0ng\/kh\u00ed n\u00e9n Vi\u1ec7t Nam<\/td>\n<td>NPSM (song song, gi\u1edbi h\u1ea1n)<\/td>\n<\/tr>\n<tr>\n<td><strong>Ti\u00eau chu\u1ea9n ISO Metric<\/strong><\/td>\n<td>G\u00f3c 60\u00b0<\/td>\n<td>M\u00e9t<\/td>\n<td>B\u01b0\u1edbc ren mm<\/td>\n<td>No<\/td>\n<td>K\u1ef9 thu\u1eadt qu\u1ed1c t\u1ebf<\/td>\n<td>Kh\u00f4ng thu\u1ed9c c\u00e1c lo\u1ea1i tr\u00ean<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>UNF so v\u1edbi UNC: Quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf<\/h3>\n<p>Trong th\u1ef1c t\u1ebf, ch\u00fang t\u00f4i \u0111\u00e3 th\u1ea5y c\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng ch\u1ec9 \u0111\u1ecbnh qu\u00e1 m\u1ee9c UNF trong khi UNC c\u0169ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u2014 v\u00e0 nguy hi\u1ec3m h\u01a1n l\u00e0 ch\u1ec9 \u0111\u1ecbnh thi\u1ebfu khi rung \u0111\u1ed9ng \u0111\u00f2i h\u1ecfi ren m\u1ecbn.<\/p>\n<p><strong>S\u1eed d\u1ee5ng UNF khi:<\/strong><br \/>\n\u2013 C\u00f3 rung \u0111\u1ed9ng (m\u00e1y m\u00f3c quay, \u0111\u1ed9ng c\u01a1, k\u1ebft c\u1ea5u m\u00e1y bay)<br \/>\n\u2013 M\u1ed1i n\u1ed1i y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c l\u1ef1c si\u1ebft theo m\u00f4-men xo\u1eafn<br \/>\n\u2013 Th\u00e0nh v\u00e1ch m\u1ecfng \u2014 UNF c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n, ngh\u0129a l\u00e0 \u00edt v\u1eadt li\u1ec7u b\u1ecb lo\u1ea1i b\u1ecf h\u01a1n khi taro ren<br \/>\n\u2013 Bu l\u00f4ng quan tr\u1ecdng v\u1ec1 an to\u00e0n v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c kh\u00f3a d\u00e2y ho\u1eb7c ch\u1ed1t an to\u00e0n<\/p>\n<p><strong>S\u1eed d\u1ee5ng UNC khi:<\/strong><br \/>\n\u2013 L\u1eafp r\u00e1p th\u01b0\u1eddng xuy\u00ean ho\u1eb7c b\u1ea3o tr\u00ec t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng (UNC c\u1ea7n \u00edt v\u00f2ng ren tr\u00ean m\u1ed7i inch h\u01a1n)<br \/>\n\u2013 Nguy c\u01a1 nhi\u1ec5m b\u1ea9n ho\u1eb7c \u0103n m\u00f2n cao \u2014 <a href=\"https:\/\/productionscrews.com\/vi\/unc-thread\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"939\">Ren UNC<\/a> l\u00e0m s\u1ea1ch m\u1ea3nh v\u1ee5n t\u1ed1t h\u01a1n<br \/>\n\u2013 Taro v\u00e0o v\u1eadt li\u1ec7u m\u1ec1m nh\u01b0 nh\u00f4m ho\u1eb7c nh\u1ef1a nhi\u1ec7t d\u1ebbo (nhi\u1ec1u v\u1eadt li\u1ec7u ren h\u01a1n tr\u00ean m\u1ed7i inch d\u00e0i)<br \/>\n\u2013 Chi ph\u00ed ban \u0111\u1ea7u l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh \u2014 ph\u1ee5 ki\u1ec7n UNC \u0111\u01b0\u1ee3c d\u1ef1 tr\u1eef r\u1ed9ng r\u00e3i h\u01a1n v\u00e0 r\u1ebb h\u01a1n kho\u1ea3ng 15\u201325% khi mua s\u1ed1 l\u01b0\u1ee3ng l\u1edbn<\/p>\n<p>So s\u00e1nh l\u1eafp r\u00e1p nhanh: m\u1ed9t bu l\u00f4ng UNF 1\/4-28 c\u1ea7n <strong>28 v\u00f2ng xoay<\/strong> \u0111\u1ec3 ti\u1ebfn m\u1ed9t inch. M\u1ed9t bu l\u00f4ng UNC 1\/4-20 ch\u1ec9 c\u1ea7n <strong>20 v\u00f2ng xoay<\/strong>. Tr\u00ean d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn l\u1eafp r\u00e1p 500 m\u1ed1i n\u1ed1i m\u1ed7i ca, vi\u1ec7c gi\u1ea3m 40% s\u1ed1 v\u00f2ng xoay tr\u00ean m\u1ed7i ch\u1ed1t gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian chu tr\u00ecnh.<\/p>\n<h3>UNF v\u00e0 BSP c\u00f3 gi\u1ed1ng nhau kh\u00f4ng? (Kh\u00f4ng \u2014 \u0110\u00e2y l\u00e0 l\u00fd do)<\/h3>\n<p><strong>UNF v\u00e0 BSP kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau.<\/strong> BSP (Ti\u00eau chu\u1ea9n \u1ed1ng ren Anh) s\u1eed d\u1ee5ng <strong>g\u00f3c ren Whitworth 55\u00b0<\/strong>, trong khi UNF s\u1eed d\u1ee5ng <strong>G\u00f3c 60\u00b0<\/strong>. Ngay c\u1ea3 khi \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a t\u01b0\u01a1ng t\u1ef1 nhau, c\u00e1c g\u00f3c s\u01b0\u1eddn kh\u00e1c nhau t\u1ea1o ra d\u1ea1ng ren kh\u00f4ng t\u01b0\u01a1ng th\u00edch. \u00c9p m\u1ed9t \u0111\u1ea7u n\u1ed1i BSP v\u00e0o l\u1ed7 ren UNF \u2014 ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i \u2014 s\u1ebd g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ch\u00e9o ren, r\u00f2 r\u1ec9 ho\u1eb7c tu\u1ed9t ren.<\/p>\n<p>Lu\u00f4n x\u00e1c minh ti\u00eau chu\u1ea9n ren b\u1eb1ng th\u01b0\u1edbc \u0111o ren \u0111\u00e3 hi\u1ec7u chu\u1ea9n tr\u01b0\u1edbc khi gi\u1ea3 \u0111\u1ecbnh kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch. Ch\u1ec9 ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t UNF v\u1edbi BSP tr\u00ean c\u00e1c bulong c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u01b0\u01a1ng t\u1ef1.<\/p>\n<h3>UNF so v\u1edbi NPT: C\u01a1 kh\u00ed so v\u1edbi l\u00e0m k\u00edn \u1ed1ng<\/h3>\n<p>Ren NPT (National Pipe Taper) l\u00e0 <strong>h\u00ecnh c\u00f4n<\/strong> \u2014 ch\u00fang l\u00e0m k\u00edn b\u1eb1ng c\u00e1ch kim lo\u1ea1i \u00e9p v\u00e0o nhau khi ph\u1ea7n c\u00f4n ch\u00e8n v\u00e0o \u0111\u1ea7u n\u1ed1i. Ren UNF l\u00e0 <strong>song song<\/strong> \u2014 ch\u00fang k\u1eb9p m\u1ed9t b\u1ec1 m\u1eb7t l\u00e0m k\u00edn (gio\u0103ng, v\u00f2ng O, ho\u1eb7c m\u1eb7t) nh\u01b0ng t\u1ef1 b\u1ea3n th\u00e2n kh\u00f4ng t\u1ea1o ra s\u1ef1 k\u00edn.<\/p>\n<p>Vi\u1ec7c tr\u1ed9n l\u1eabn NPT v\u00e0 UNF l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y r\u00f2 r\u1ec9 th\u1ee7y l\u1ef1c. M\u1ed9t c\u1ed5ng \u0111\u01b0\u1ee3c ghi l\u00e0 \u201c1\/2-14 NPT\u201d kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u1ea7u n\u1ed1i 1\/2-20 UNF \u2014 s\u1ed1 v\u00f2ng ren tr\u00ean inch kh\u00e1c nhau (14 so v\u1edbi 20) v\u00e0 UNF kh\u00f4ng c\u00f3 \u0111\u1ed9 c\u00f4n. Kh\u00f4ng bao gi\u1edd thay th\u1ebf gi\u1eefa c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y n\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 cho ph\u00e9p k\u1ef9 thu\u1eadt r\u00f5 r\u00e0ng.<\/p>\n<hr \/>\n<h2>Ti\u00eau chu\u1ea9n ren UNF, Dung sai v\u00e0 C\u00e1c l\u1edbp<\/h2>\n<p><strong>C\u00e1c l\u1edbp ren UNF 1A\/1B \u0111\u1ebfn 3A\/3B x\u00e1c \u0111\u1ecbnh dung sai \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren cho ph\u00e9p \u2014 l\u1edbp 2A\/2B \u00e1p d\u1ee5ng cho h\u01a1n 95% \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt; l\u1edbp 3A\/3B d\u00e0nh cho y\u00eau c\u1ea7u ch\u00ednh x\u00e1c ho\u1eb7c h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5.<\/strong><\/p>\n<p>Th\u00f4ng s\u1ed1 \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 dung sai ren UNF \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b1-1-unified-inch-screw-threads-un-and-uns-thread-form\" target=\"_blank\" rel=\"noopener\">ANSI\/ASME B1.1 Ren v\u00edt h\u1ec7 inch th\u1ed1ng nh\u1ea5t<\/a>, quy \u0111\u1ecbnh c\u1ea3 h\u00ecnh h\u1ecdc ren v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c v\u00f9ng dung sai.<\/p>\n<p><strong>B\u1ea3ng 3: C\u00e1c l\u1edbp ren UNF \u2014 \u0110\u1ed9 kh\u00edt, Dung sai v\u00e0 \u1ee8ng d\u1ee5ng<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>L\u1edbp<\/th>\n<th>K\u00fd hi\u1ec7u<\/th>\n<th>Dung sai<\/th>\n<th>Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ed9 kh\u00edt<\/th>\n<th>C\u00e1c Tr\u01b0\u1eddng h\u1ee3p S\u1eed d\u1ee5ng \u0110i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>1A (ngo\u00e0i) \/ 1B (trong)<\/td>\n<td>L\u1edbn nh\u1ea5t \u2014 \u0111\u1ed9 h\u1edf t\u1ed1i \u0111a<\/td>\n<td>L\u1ecfng<\/td>\n<td>M\u00f4i tr\u01b0\u1eddng b\u1ea9n, d\u1ecbch v\u1ee5 kh\u1eafc nghi\u1ec7t, thay th\u1ebf b\u1ea3o tr\u00ec<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>2A (ngo\u00e0i) \/ 2B (trong)<\/td>\n<td>Ti\u00eau chu\u1ea9n \u2014 c\u00e2n b\u1eb1ng<\/td>\n<td>M\u1ee5c \u0111\u00edch chung<\/td>\n<td>Ph\u1ee5 ki\u1ec7n c\u00f4ng nghi\u1ec7p, bu l\u00f4ng th\u01b0\u01a1ng m\u1ea1i, h\u1ea7u h\u1ebft \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>3A (ngo\u00e0i) \/ 3B (trong)<\/td>\n<td>Ch\u1eb7t nh\u1ea5t \u2014 \u0111\u1ed9 h\u1edf t\u1ed1i thi\u1ec3u<\/td>\n<td>\u0110\u1ed9 ch\u00ednh x\u00e1c<\/td>\n<td>H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, qu\u1ed1c ph\u00f2ng, thi\u1ebft b\u1ecb, c\u00e1c m\u1ed1i gh\u00e9p quan tr\u1ecdng kh\u00edt s\u00e1t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>L\u1edbp 2A\/2B l\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00fang cho ph\u1ea7n l\u1edbn c\u00e1c \u1ee9ng d\u1ee5ng. Ch\u1ec9 \u0111\u1ecbnh l\u1edbp 3A\/3B s\u1ebd t\u0103ng chi ph\u00ed m\u00e0 kh\u00f4ng c\u00f3 l\u1ee3i \u00edch tr\u1eeb khi:<br \/>\n\u2013 B\u1ea3n v\u1ebd h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 (MIL-SPEC, NAS ho\u1eb7c \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd theo AS9100) y\u00eau c\u1ea7u<br \/>\n\u2013 B\u1ed9 ph\u1eadn l\u1eafp r\u00e1p ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi t\u1ea3i thay \u0111\u1ed5i, n\u01a1i bi\u1ebfn \u0111\u1ed5i \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng m\u00e0i m\u00f2n m\u1ecfi quan tr\u1ecdng<br \/>\n\u2013 \u1ee8ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 kh\u00edt kh\u00f4ng c\u00f3 \u0111\u1ed9 r\u01a1 d\u01b0\u1edbi t\u1ea3i \u0111\u1ed9ng<\/p>\n<p>L\u1edbp 1A\/1B hi\u1ebfm khi \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong c\u00e1c thi\u1ebft k\u1ebf m\u1edbi \u2014 ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 l\u1edbp thay th\u1ebf b\u1ea3o tr\u00ec khi ren b\u1ecb m\u00f2n c\u1ea7n m\u1ed9t ch\u1ed1t l\u1ecfng \u0111\u1ec3 v\u1eabn ho\u1ea1t \u0111\u1ed9ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n<h3>Dung sai \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc trong th\u1ef1c t\u1ebf<\/h3>\n<p>\u0110\u1ed1i v\u1edbi ren ngo\u00e0i 1\/4-28 UNF-2A, ASME B1.1 quy \u0111\u1ecbnh dung sai \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc kho\u1ea3ng \u00b10,0019 inch (\u00b10,048 mm). L\u1edbp 3A si\u1ebft ch\u1eb7t l\u1ea1i c\u00f2n kho\u1ea3ng \u00b10,0013 inch. Nh\u1eefng con s\u1ed1 n\u00e0y nh\u1ecf trong th\u1ef1c t\u1ebf \u2014 nh\u01b0ng v\u1edbi 28 TPI, sai s\u1ed1 \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc 0,002 inch <a href=\"https:\/\/productionscrews.com\/vi\/thread-pitch\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"940\">l\u1ed7i \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc \u0111\u1ea1i di\u1ec7n g\u1ea7n 1\/14 c\u1ee7a to\u00e0n b\u1ed9 b\u01b0\u1edbc ren<\/a> Trong c\u00e1c b\u1ed9 l\u1eafp r\u00e1p ch\u00ednh x\u00e1c, s\u1ef1 bi\u1ebfn \u0111\u1ed5i \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng m\u1ed1i gh\u00e9p v\u00e0 \u0111\u1ed9 nh\u1ea5t qu\u00e1n c\u1ee7a l\u1ef1c si\u1ebft tr\u01b0\u1edbc.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/03-howto-8.png\" alt=\"Ren UNF \u2014 minh h\u1ecda h\u01b0\u1edbng d\u1eabn c\u00e1ch ki\u1ec3m tra ren b\u1eb1ng th\u01b0\u1edbc \u0111o go\/no-go tr\u00ean bu l\u00f4ng \u0111\u00e3 gia c\u00f4ng\" \/><\/p>\n<h3>Ki\u1ec3m tra Go \/ No-Go cho x\u00e1c minh ren UNF<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ea7u v\u00e0o ch\u1ed1t ren UNF s\u1eed d\u1ee5ng <strong>c\u00e1c th\u01b0\u1edbc \u0111o ren go\/no-go<\/strong> (cho ren trong) v\u00e0 <strong>c\u00e1c th\u01b0\u1edbc \u0111o v\u00f2ng ren<\/strong> (cho ren ngo\u00e0i). Th\u01b0\u1edbc \u0111o go ph\u1ea3i \u0111i qua b\u1eb1ng l\u1ef1c tay; th\u01b0\u1edbc \u0111o no-go kh\u00f4ng \u0111\u01b0\u1ee3c v\u00e0o. Ki\u1ec3m tra nh\u1ecb ph\u00e2n n\u00e0y x\u00e1c minh r\u1eb1ng \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc n\u1eb1m trong dung sai l\u1edbp quy \u0111\u1ecbnh.<\/p>\n<p>\u0110\u1ed1i v\u1edbi s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t, m\u00e1y \u0111o t\u1ecda \u0111\u1ed9 (CMM) quang h\u1ecdc \u0111ang thay th\u1ebf ki\u1ec3m tra th\u1ee7 c\u00f4ng \u1edf nhi\u1ec1u chu\u1ed7i cung \u1ee9ng h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 c\u1ea5p 1 t\u1ea1i Vi\u1ec7t Nam. \u0110o l\u01b0\u1eddng quan tr\u1ecdng lu\u00f4n l\u00e0 \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc \u2014 kh\u00f4ng ph\u1ea3i \u0111\u01b0\u1eddng k\u00ednh l\u1edbn, v\u1ed1n d\u1ec5 \u0111o h\u01a1n nh\u01b0ng \u00edt \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng kh\u00edt h\u01a1n.<\/p>\n<hr \/>\n<h2>Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai trong \u1ee9ng d\u1ee5ng ren UNF (2026+)<\/h2>\n<p><strong>Nhu c\u1ea7u ren UNF \u0111ang t\u0103ng \u1edf c\u00e1c l\u0129nh v\u1ef1c \u0111i\u1ec7n h\u00f3a v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 ph\u00e1t tri\u1ec3n nhanh h\u01a1n s\u1ea3n xu\u1ea5t chung, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi y\u00eau c\u1ea7u h\u1ee3p kim chuy\u00ean bi\u1ec7t v\u00e0 nhu c\u1ea7u t\u00e0i li\u1ec7u ch\u1ed1t \u0111\u01b0\u1ee3c x\u00e1c minh k\u1ef9 thu\u1eadt s\u1ed1, c\u00f3 th\u1ec3 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c.<\/strong><\/p>\n<h3>Ch\u1ed1t UNF c\u01b0\u1eddng \u0111\u1ed9 cao trong xe \u0111i\u1ec7n v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5<\/h3>\n<p>B\u1ed9 pin xe \u0111i\u1ec7n y\u00eau c\u1ea7u h\u00e0ng ngh\u00ecn ch\u1ed1t ren m\u1ecbn \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh c\u00e1c m\u00f4-\u0111un cell \u2014 qu\u1ea3n l\u00fd rung \u0111\u1ed9ng trong h\u1ec7 truy\u1ec1n \u0111\u1ed9ng xe \u0111i\u1ec7n \u01b0u ti\u00ean s\u1eed d\u1ee5ng ren UNF v\u00ec nh\u1eefng l\u00fd do t\u01b0\u01a1ng t\u1ef1 nh\u01b0 trong ng\u00e0nh h\u00e0ng kh\u00f4ng. C\u00e1c n\u1ec1n t\u1ea3ng h\u00e0ng kh\u00f4ng th\u1ebf h\u1ec7 m\u1edbi (m\u00e1y bay di chuy\u1ec3n \u0111\u00f4 th\u1ecb, ph\u1ea7n c\u1ee9ng v\u1ec7 tinh, ph\u01b0\u01a1ng ti\u1ec7n th\u1eed nghi\u1ec7m si\u00eau thanh) \u0111ang gia t\u0103ng nhu c\u1ea7u v\u1ec1 ch\u1ed1t ren UNF \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, \u0111\u1ed9 b\u1ec1n cao b\u1eb1ng h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t:<\/p>\n<ul>\n<li><strong>Titanium Grade 5 (Ti-6Al-4V):<\/strong> T\u1ef7 l\u1ec7 \u0111\u1ed9 b\u1ec1n tr\u00ean tr\u1ecdng l\u01b0\u1ee3ng quan tr\u1ecdng \u0111\u1ec3 ti\u1ebft ki\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng trong h\u00e0ng kh\u00f4ng; gia c\u00f4ng ren UNF c\u1ea7n d\u1ee5ng c\u1ee5 carbide chuy\u00ean d\u1ee5ng<\/li>\n<li><strong>Inconel 718:<\/strong> H\u1ee3p kim si\u00eau b\u1ec1n niken ch\u1ecbu nhi\u1ec7t cao d\u00f9ng cho thi\u1ebft b\u1ecb tua-bin; ren UNF c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c CNC \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o dung sai c\u1ea5p 3A tr\u00ean v\u1eadt li\u1ec7u c\u1ee9ng h\u00f3a<\/li>\n<li><strong>Th\u00e9p kh\u00f4ng g\u1ec9 A286:<\/strong> Ch\u1ed1ng \u0103n m\u00f2n, \u0111\u1ed9 b\u1ec1n cao; d\u00f9ng cho ren UNF <a href=\"https:\/\/productionscrews.com\/vi\/expert-guide-to-special-fasteners-manufacturing-from-jet-engines-to-custom-solutions\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"942\">ch\u1ed1t trong ph\u1ee5 ki\u1ec7n \u0111\u1ed9ng c\u01a1 ph\u1ea3n l\u1ef1c<\/a> v\u00e0 h\u1ec7 th\u1ed1ng \u0111\u1ea9y t\u00ean l\u1eeda<\/li>\n<\/ul>\n<p>Th\u1ecb tr\u01b0\u1eddng ch\u1ed1t to\u00e0n c\u1ea7u, \u0111\u01b0\u1ee3c \u0111\u1ecbnh gi\u00e1 kho\u1ea3ng 95 t\u1ef7 \u0111\u1ed3ng v\u00e0o n\u0103m 2024, d\u1ef1 ki\u1ebfn t\u0103ng tr\u01b0\u1edfng v\u1edbi t\u1ed1c \u0111\u1ed9 CAGR 3,5% \u0111\u1ebfn n\u0103m 2030 \u2014 trong \u0111\u00f3 ph\u00e2n kh\u00fac ren m\u1ecbn cho h\u00e0ng kh\u00f4ng v\u00e0 xe \u0111i\u1ec7n v\u01b0\u1ee3t m\u1ee9c trung b\u00ecnh khi qu\u00e1 tr\u00ecnh \u0111i\u1ec7n h\u00f3a t\u0103ng t\u1ed1c.<\/p>\n<h3>Ki\u1ec3m tra Ren K\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 S\u1ea3n xu\u1ea5t Th\u00f4ng minh<\/h3>\n<p>Ki\u1ec3m tra ren \u0111ang chuy\u1ec3n t\u1eeb \u0111o th\u1ee7 c\u00f4ng sang h\u1ec7 th\u1ed1ng th\u1ecb gi\u00e1c t\u1ef1 \u0111\u1ed9ng t\u00edch h\u1ee3p ph\u1ea7n m\u1ec1m Ki\u1ec3m so\u00e1t Quy tr\u00ecnh Th\u1ed1ng k\u00ea (SPC). \u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t ch\u1ed1t ren UNF s\u1ed1 l\u01b0\u1ee3ng l\u1edbn, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng \u0111o ren quang h\u1ecdc<\/strong> (laser ho\u1eb7c giao thoa \u00e1nh s\u00e1ng tr\u1eafng) thay th\u1ebf th\u01b0\u1edbc \u0111o \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t cho ki\u1ec3m tra tr\u1ef1c tuy\u1ebfn 100%<\/li>\n<li><strong>CMM v\u1edbi \u0111\u1ea7u d\u00f2 qu\u00e9t ren<\/strong> cho ch\u1ed1t h\u00e0ng kh\u00f4ng c\u1ea5p 3A \u2014 d\u1eef li\u1ec7u \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc, b\u01b0\u1edbc ren v\u00e0 h\u00ecnh d\u1ea1ng ren \u0111\u01b0\u1ee3c ghi l\u1ea1i cho t\u1eebng l\u00f4<\/li>\n<li><strong>Ch\u1ee9ng nh\u1eadn ren k\u1ef9 thu\u1eadt s\u1ed1<\/strong> v\u1edbi truy xu\u1ea5t ngu\u1ed3n g\u1ed1c m\u00e3 QR t\u1eeb <a href=\"https:\/\/productionscrews.com\/vi\/raw-material-testing-a-comprehensive-guide-to-quality-control-methods-2024\/\" target=\"_blank\" rel=\"noopener\" data-wpil-monitor-id=\"943\">v\u1eadt li\u1ec7u th\u00f4<\/a> l\u00f4 nhi\u1ec7t \u0111\u1ebfn ki\u1ec3m tra cu\u1ed1i c\u00f9ng \u2014 ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u theo c\u00e1c th\u1ecfa thu\u1eadn ch\u1ea5t l\u01b0\u1ee3ng nh\u00e0 cung c\u1ea5p AS9100D v\u00e0 IATF 16949<\/li>\n<\/ul>\n<p>Ng\u01b0\u1eddi mua t\u00ecm ki\u1ebfm ch\u1ed1t ren UNF cho \u1ee9ng d\u1ee5ng h\u00e0ng kh\u00f4ng ho\u1eb7c \u00f4 t\u00f4 c\u1ea5p 1 t\u1ea1i Vi\u1ec7t Nam n\u00ean k\u1ef3 v\u1ecdng \u2014 v\u00e0 y\u00eau c\u1ea7u \u2014 h\u1ed3 s\u01a1 ki\u1ec3m tra \u0111\u01b0\u1ee3c ghi nh\u1eadn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 \u0111\u1ed9 ph\u00f9 h\u1ee3p \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc theo dung sai c\u1ea5p ASME B1.1. Nh\u00e0 cung c\u1ea5p kh\u00f4ng th\u1ec3 cung c\u1ea5p truy xu\u1ea5t ngu\u1ed3n g\u1ed1c n\u00e0y s\u1ebd kh\u00f4ng ph\u00f9 h\u1ee3p cho chu\u1ed7i cung \u1ee9ng quan tr\u1ecdng v\u1ec1 an to\u00e0n.<\/p>\n<hr \/>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 ren UNF<\/h2>\n<p><strong>M\u1ed7i c\u00e2u tr\u1ea3 l\u1eddi d\u01b0\u1edbi \u0111\u00e2y b\u1eaft \u0111\u1ea7u b\u1eb1ng ph\u1ea3n h\u1ed3i tr\u1ef1c ti\u1ebfp, sau \u0111\u00f3 m\u1edf r\u1ed9ng \u2014 h\u00e3y s\u1eed d\u1ee5ng nh\u1eefng c\u00e2u n\u00e0y \u0111\u1ec3 tham kh\u1ea3o nhanh ho\u1eb7c sao ch\u00e9p d\u1ea1ng ng\u1eafn cho t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n.<\/strong><\/p>\n<h3>Ren UNF l\u00e0 g\u00ec?<\/h3>\n<p><strong>Ren UNF l\u00e0 ren Unified National Fine \u2014 m\u1ed9t lo\u1ea1i ren v\u00edt g\u00f3c 60\u00b0 theo h\u1ec7 inch v\u1edbi b\u01b0\u1edbc ren nh\u1ecf h\u01a1n UNC, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi ANSI\/ASME B1.1.<\/strong> Ren UNF \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng s\u1ed1 ren tr\u00ean m\u1ed7i inch (TPI), bao g\u1ed3m c\u00e1c k\u00edch th\u01b0\u1edbc t\u1eeb #0 \u0111\u1ebfn 1-1\/2 inch v\u00e0 l\u1edbn h\u01a1n, v\u00e0 l\u00e0 ti\u00eau chu\u1ea9n ren \u01b0u ti\u00ean cho c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng kh\u00f4ng, \u00f4 t\u00f4 hi\u1ec7u su\u1ea5t cao v\u00e0 thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c. M\u1ed9t k\u00fd hi\u1ec7u \u0111\u1ea7y \u0111\u1ee7 s\u1ebd nh\u01b0 \u201c1\/4-28 UNF-2A\u201d \u2014 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, TPI, ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p \u0111\u1ed9.<\/p>\n<h3>UNF v\u00e0 BSP c\u00f3 gi\u1ed1ng nhau kh\u00f4ng?<\/h3>\n<p><strong>Kh\u00f4ng \u2014 UNF v\u00e0 BSP kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau.<\/strong> UNF s\u1eed d\u1ee5ng g\u00f3c s\u01b0\u1eddn 60\u00b0; BSP s\u1eed d\u1ee5ng g\u00f3c Whitworth 55\u00b0. Ngay c\u1ea3 khi \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a c\u00f3 v\u1ebb gi\u1ed1ng nhau, h\u00ecnh h\u1ecdc s\u01b0\u1eddn kh\u00f4ng t\u01b0\u01a1ng th\u00edch khi\u1ebfn ch\u1ed1t BSP kh\u00f4ng th\u1ec3 t\u1ea1o li\u00ean k\u1ebft ren \u0111\u00fang trong l\u1ed7 ren UNF. Lu\u00f4n ki\u1ec3m tra b\u1eb1ng th\u01b0\u1edbc \u0111o ren. Vi\u1ec7c tr\u1ed9n l\u1eabn c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra l\u1ed7i kh\u1edbp n\u1ed1i th\u1ee7y l\u1ef1c v\u00e0 kh\u00ed n\u00e9n.<\/p>\n<h3>UNC hay UNF t\u1ed1t h\u01a1n?<\/h3>\n<p><strong>Kh\u00f4ng lo\u1ea1i n\u00e0o t\u1ed1t h\u01a1n ho\u00e0n to\u00e0n \u2014 m\u1ed7i lo\u1ea1i ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch kh\u00e1c nhau.<\/strong> UNF ph\u00f9 h\u1ee3p cho c\u00e1c c\u1ee5m d\u1ec5 rung, ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn ch\u00ednh x\u00e1c v\u00e0 ren th\u00e0nh m\u1ecfng. UNC ph\u00f9 h\u1ee3p cho l\u1eafp r\u00e1p nhanh, m\u00f4i tr\u01b0\u1eddng b\u1ea9n, ren v\u1eadt li\u1ec7u m\u1ec1m v\u00e0 \u1ee9ng d\u1ee5ng ti\u1ebft ki\u1ec7m chi ph\u00ed. M\u1eb7c \u0111\u1ecbnh ch\u1ecdn UNC tr\u1eeb khi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n c\u1ea7n \u01b0u \u0111i\u1ec3m c\u1ee7a ren m\u1ecbn.<\/p>\n<h3>UNF l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a g\u00ec?<\/h3>\n<p><strong>UNF l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Unified National Fine.<\/strong> \u201cUnified\u201d \u0111\u1ec1 c\u1eadp \u0111\u1ebfn th\u1ecfa thu\u1eadn ti\u00eau chu\u1ea9n h\u00f3a ren ba qu\u1ed1c gia Vi\u1ec7t Nam\/Canada\/Anh v\u00e0o nh\u1eefng n\u0103m 1940; \u201cNational\u201d ch\u1ec9 ti\u00eau chu\u1ea9n B\u1eafc M\u1ef9 (kh\u00e1c v\u1edbi Whitworth c\u1ee7a Anh); \u201cFine\u201d ngh\u0129a l\u00e0 b\u01b0\u1edbc ren nh\u1ecf h\u01a1n \u2014 nhi\u1ec1u TPI h\u01a1n \u2014 so v\u1edbi ti\u00eau chu\u1ea9n Unified National Coarse (UNC) \u1edf c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i b\u01b0\u1edbc ren UNF sang mm?<\/h3>\n<p><strong>Chia 25,4 cho gi\u00e1 tr\u1ecb TPI.<\/strong> \u0110\u1ed1i v\u1edbi 1\/4-28 UNF: 25,4 \u00f7 28 = <strong>B\u01b0\u1edbc ren 0,907 mm<\/strong>. \u0110\u01b0\u1eddng k\u00ednh l\u1edbn t\u00ednh b\u1eb1ng mm = k\u00edch th\u01b0\u1edbc danh ngh\u0129a inch \u00d7 25,4 (1\/4 inch = 6,35 mm). L\u01b0u \u00fd r\u1eb1ng ren UNF kh\u00f4ng th\u1ec3 thay th\u1ebf cho ren ISO h\u1ec7 m\u00e9t ngay c\u1ea3 khi gi\u00e1 tr\u1ecb b\u01b0\u1edbc ren c\u00f3 v\u1ebb gi\u1ed1ng nhau \u2014 thi\u1ebft k\u1ebf ren kh\u00e1c nhau, h\u1ec7 th\u1ed1ng dung sai kh\u00e1c nhau.<\/p>\n<h3>K\u00edch th\u01b0\u1edbc m\u0169i khoan taro cho ren UNF l\u00e0 bao nhi\u00eau?<\/h3>\n<p><strong>Tr\u1eeb b\u01b0\u1edbc ren kh\u1ecfi \u0111\u01b0\u1eddng k\u00ednh l\u1edbn \u0111\u1ec3 c\u00f3 k\u00edch th\u01b0\u1edbc m\u0169i khoan taro cho m\u1ee9c \u0103n kh\u1edbp 75%.<\/strong> V\u1edbi 1\/4-28 UNF: 0,250 \u2212 0,036 = 0,214 in \u2192 d\u00f9ng m\u0169i khoan s\u1ed1 3 (0,2130 in). V\u1edbi 10-32 UNF: 0,190 \u2212 0,031 = 0,159 in \u2192 d\u00f9ng m\u0169i khoan s\u1ed1 21 (0,1590 in). \u0110i\u1ec1u ch\u1ec9nh gi\u1ea3m cho v\u1eadt li\u1ec7u c\u1ee9ng c\u1ea7n m\u1ee9c \u0103n kh\u1edbp cao h\u01a1n, ho\u1eb7c t\u0103ng cho v\u1eadt li\u1ec7u m\u1ec1m \u0111\u1ec3 gi\u1ea3m g\u00e3y m\u0169i taro.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ren UNF v\u00e0 ren UNS l\u00e0 g\u00ec?<\/h3>\n<p><strong>UNS (Unified National Special) s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb s\u1ed1 ren tr\u00ean m\u1ed7i inch (TPI) kh\u00f4ng ti\u00eau chu\u1ea9n cho m\u1ed9t \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a nh\u1ea5t \u0111\u1ecbnh.<\/strong> V\u00ed d\u1ee5, ren 1\/4-32 UNS s\u1eed d\u1ee5ng 32 TPI thay v\u00ec 28 TPI ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh cho 1\/4 inch UNF. UNS \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh khi c\u1ea3 UNC v\u00e0 UNF \u0111\u1ec1u kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft k\u1ebf \u2014 th\u01b0\u1eddng d\u00f9ng cho \u1ed1ng th\u00e0nh m\u1ecfng, ph\u1ee5 ki\u1ec7n th\u1ee7y l\u1ef1c \u0111\u1eb7c bi\u1ec7t ho\u1eb7c thi\u1ebft k\u1ebf m\u00e1y m\u00f3c c\u0169. Ren UNS c\u1ea7n d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng v\u00e0 kh\u00f4ng th\u1ec3 d\u00f9ng m\u0169i taro, b\u00e0n ren ti\u00eau chu\u1ea9n trong danh m\u1ee5c.<\/p>\n<h3>C\u00f3 th\u1ec3 d\u00f9ng ren UNF \u0111\u1ec3 thay th\u1ebf ren h\u1ec7 m\u00e9t tr\u00ean m\u00e1y m\u00f3c nh\u1eadp kh\u1ea9u kh\u00f4ng?<\/h3>\n<p><strong>Kh\u00f4ng th\u1ec3 thay th\u1ebf tr\u1ef1c ti\u1ebfp \u2014 ren UNF v\u00e0 ren ISO h\u1ec7 m\u00e9t kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau.<\/strong> H\u00ecnh h\u1ecdc ren kh\u00e1c nhau (\u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh, b\u00e1n k\u00ednh ch\u00e2n ren v\u00e0 h\u1ec7 th\u1ed1ng dung sai \u0111\u1ec1u kh\u00e1c bi\u1ec7t). Trong tr\u01b0\u1eddng h\u1ee3p s\u1eeda ch\u1eefa kh\u1ea9n c\u1ea5p t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, ren inch v\u1eeba kh\u00edt \u0111\u00f4i khi c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1ea1m th\u1eddi, nh\u01b0ng \u0111i\u1ec1u n\u00e0y g\u00e2y r\u1ee7i ro ki\u1ec3m tra v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c tr\u01b0\u1edbc khi thi\u1ebft b\u1ecb quay l\u1ea1i ho\u1ea1t \u0111\u1ed9ng. M\u1ecdi s\u1ef1 thay th\u1ebf c\u1ea7n \u0111\u01b0\u1ee3c ghi nh\u1eadn v\u00e0 ph\u00ea duy\u1ec7t b\u1edfi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb.<\/p>\n<hr \/>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Ren UNF l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c, kh\u00f4ng ch\u1ec9 l\u00e0 k\u00fd hi\u1ec7u tr\u00ean b\u1ea3n v\u1ebd. G\u00f3c 60\u00b0, gi\u00e1 tr\u1ecb TPI ti\u00eau chu\u1ea9n t\u1eeb 0-80 \u0111\u1ebfn 1-1\/2-12, v\u00e0 h\u1ec7 th\u1ed1ng dung sai ba c\u1ea5p mang l\u1ea1i cho k\u1ef9 s\u01b0 v\u00e0 b\u1ed9 ph\u1eadn mua h\u00e0ng m\u1ed9t c\u00f4ng c\u1ee5 d\u1ef1 \u0111o\u00e1n, t\u00e0i li\u1ec7u h\u00f3a t\u1ed1t cho c\u00e1c c\u1ee5m l\u1eafp r\u00e1p c\u1ea7n ch\u1ed1ng rung, duy tr\u00ec l\u1ef1c si\u1ebft ch\u00ednh x\u00e1c, ho\u1eb7c l\u1eafp v\u00e0o k\u1ebft c\u1ea5u th\u00e0nh m\u1ecfng n\u01a1i ren th\u00f4 s\u1ebd l\u1ea5y \u0111i qu\u00e1 nhi\u1ec1u v\u1eadt li\u1ec7u.<\/p>\n<p>\u0110\u1ed1i v\u1edbi b\u1ed9 ph\u1eadn mua h\u00e0ng: lu\u00f4n ch\u1ec9 \u0111\u1ecbnh \u0111\u1ea7y \u0111\u1ee7 \u2014 k\u00edch th\u01b0\u1edbc danh ngh\u0129a + TPI + ti\u00eau chu\u1ea9n + c\u1ea5p dung sai. \u201cBu l\u00f4ng 1\/4\u201d l\u00e0 kh\u00f4ng r\u00f5 r\u00e0ng. \u201cBu l\u00f4ng 1\/4-28 UNF-2A\u201d l\u00e0 th\u00f4ng s\u1ed1 ho\u00e0n ch\u1ec9nh, kh\u00f4ng \u0111\u1ec3 x\u1ea3y ra l\u1ed7i thay th\u1ebf t\u1eeb nh\u00e0 cung c\u1ea5p. L\u00e0m \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u s\u1ebd lo\u1ea1i b\u1ecf chi ph\u00ed ki\u1ec3m tra, lo\u1ea1i b\u1ecf ph\u1ebf ph\u1ea9m v\u00e0 s\u1eeda ch\u1eefa ph\u00e1t sinh khi nh\u1eadn nh\u1ea7m v\u1eadt t\u01b0 UNC cho b\u1ea3n v\u1ebd UNF.<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ngu\u1ed3n cung c\u1ea5p s\u1ed1 l\u01b0\u1ee3ng l\u1edbn bul\u00f4ng ren UNF \u2014 th\u00e9p carbon, inox ho\u1eb7c h\u1ee3p kim \u2014 \u0111\u1eb7c bi\u1ec7t cho xu\u1ea5t kh\u1ea9u ho\u1eb7c l\u1eafp r\u00e1p ch\u00ednh x\u00e1c, <a href=\"https:\/\/productionscrews.com\/vi\/contact\/\" target=\"_blank\">li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt t\u1ea1i Production Screws<\/a> \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 c\u1ea1nh tranh theo s\u1ed1 l\u01b0\u1ee3ng.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u t\u1ea5t c\u1ea3 v\u1ec1 ren UNF (ren m\u1ecbn qu\u1ed1c gia th\u1ed1ng nh\u1ea5t) \u2014 b\u1ea3ng k\u00edch th\u01b0\u1edbc \u0111\u1ea7y \u0111\u1ee7 theo inch v\u00e0 mm, so s\u00e1nh UNF v\u1edbi UNC, BSP, NPT, c\u00e1c c\u1ea5p \u0111\u1ed9 ren, \u1ee9ng d\u1ee5ng trong ng\u00e0nh v\u00e0 h\u01b0\u1edbng d\u1eabn t\u00ecm ngu\u1ed3n cung c\u1ea5p ch\u1ed1t ch\u00ednh x\u00e1c.<\/p>","protected":false},"author":1,"featured_media":3709,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3713","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\/3713","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=3713"}],"version-history":[{"count":4,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/3713\/revisions"}],"predecessor-version":[{"id":3715,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/3713\/revisions\/3715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/3709"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=3713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=3713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=3713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}