{"id":5806,"date":"2025-12-25T01:50:04","date_gmt":"2025-12-25T01:50:04","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5806"},"modified":"2025-12-25T01:50:04","modified_gmt":"2025-12-25T01:50:04","slug":"metric-external-thread-major-diameter-tolerances-calculations","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/metric-external-thread-major-diameter-tolerances-calculations\/","title":{"rendered":"Dung sai v\u00e0 c\u00e1ch t\u00ednh \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i ren h\u1ec7 m\u00e9t"},"content":{"rendered":"
\n

Gi\u1edbi thi\u1ec7u<\/h2>\n

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y chi ti\u1ebft v\u1ec1 dung sai \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren h\u1ec7 m\u00e9t, ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n ISO 965. N\u00f3 l\u00e0 ngu\u1ed3n t\u00e0i li\u1ec7u quan tr\u1ecdng cho c\u00e1c k\u1ef9 s\u01b0 c\u01a1 kh\u00ed, nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf \u0111ang t\u00ecm ki\u1ebfm th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c cho ren ngo\u00e0i c\u1ee7a bu l\u00f4ng v\u00e0 v\u00edt. \u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i, k\u00fd hi\u1ec7u l\u00e0 'd', r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0103n kh\u1edbp ch\u00ednh x\u00e1c v\u1edbi ren trong, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u1ee5m l\u1eafp r\u00e1p, ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb linh ki\u1ec7n \u00f4 t\u00f4 \u0111\u1ebfn m\u00e1y m\u00f3c h\u1ea1ng n\u1eb7ng. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c dung sai n\u00e0y, c\u00e1c chuy\u00ean gia c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p nh\u01b0 tr\u01b0\u1ee3t ren ho\u1eb7c \u0111\u1ed9 r\u01a1 qu\u00e1 m\u1ee9c, t\u1eeb \u0111\u00f3 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady v\u00e0 an to\u00e0n.<\/p>\n

N\u1ed9i dung t\u00e0i li\u1ec7u n\u00e0y d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, cung c\u1ea5p ph\u1ea1m vi dung sai cho c\u00e1c k\u00edch th\u01b0\u1edbc danh ngh\u0129a t\u1eeb M1 \u0111\u1ebfn M300 tr\u00ean nhi\u1ec1u b\u01b0\u1edbc ren kh\u00e1c nhau. N\u00f3 b\u1ed5 sung cho c\u00e1c th\u1ea3o lu\u1eadn r\u1ed9ng h\u01a1n v\u1ec1 k\u00edch th\u01b0\u1edbc ren h\u1ec7 m\u00e9t, t\u1eadp trung c\u1ee5 th\u1ec3 v\u00e0o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i l\u1edbn. \u0110\u1ec3 c\u00f3 hi\u1ec3u bi\u1ebft to\u00e0n di\u1ec7n v\u1ec1 b\u01b0\u1edbc ren v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trong nh\u1ecf, h\u00e3y tham kh\u1ea3o ISO 68-1 v\u00e0 ISO 261. H\u01b0\u1edbng d\u1eabn n\u00e0y nh\u1ea5n m\u1ea1nh \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n, v\u1edbi c\u00e1c gi\u1ea3i th\u00edch chi ti\u1ebft \u0111\u1ec3 h\u1ed7 tr\u1ee3 trong c\u00e1c quy tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<\/section>\n

\n

Hi\u1ec3u v\u1ec1 c\u00e1c lu\u1ed3ng b\u00ean ngo\u00e0i c\u1ee7a ch\u1ec9 s\u1ed1<\/h2>\n

Trong h\u1ec7 ren m\u00e9t, \u0111\u01b0\u1eddng k\u00ednh l\u1edbn 'd' c\u1ee7a ren ngo\u00e0i bi\u1ec3u th\u1ecb \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u00f9ng c\u1ee7a \u0111\u1ec9nh ren tr\u00ean bu l\u00f4ng ho\u1eb7c v\u00edt. K\u00edch th\u01b0\u1edbc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 kh\u00edt c\u1ee7a ren, v\u00ec n\u00f3 quy\u1ebft \u0111\u1ecbnh di\u1ec7n t\u00edch ti\u1ebfp x\u00fac v\u1edbi ren trong t\u01b0\u01a1ng \u1ee9ng. Sai l\u1ec7ch so v\u1edbi gi\u00e1 tr\u1ecb danh ngh\u0129a c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i l\u1eafp r\u00e1p, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0103n kh\u1edbp kh\u00f4ng \u0111\u1ee7 ho\u1eb7c b\u1ecb k\u1eb9t trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p>\n

Ren h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng k\u00edch th\u01b0\u1edbc danh ngh\u0129a (v\u00ed d\u1ee5: M10), b\u01b0\u1edbc ren v\u00e0 c\u1ea5p dung sai. Dung sai \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng thay th\u1ebf l\u1eabn nhau trong s\u1ea3n xu\u1ea5t to\u00e0n c\u1ea7u, theo \u0111\u1ecbnh ngh\u0129a trong ti\u00eau chu\u1ea9n ISO 965-1. \u0110\u1ed1i v\u1edbi ren ngo\u00e0i, dung sai th\u01b0\u1eddng l\u00e0 \u00e2m, ngh\u0129a l\u00e0 \u0111\u01b0\u1eddng k\u00ednh th\u1ef1c t\u1ebf nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a \u0111\u1ec3 t\u1ea1o kho\u1ea3ng h\u1edf. Hi\u1ec3u r\u00f5 c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c lo\u1ea1i \u1ed1c v\u00edt ph\u00f9 h\u1ee3p trong m\u00f4i tr\u01b0\u1eddng ch\u1ecbu t\u1ea3i cao, n\u01a1i c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn dung sai.<\/p>\n

    \n
  • \u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a:<\/strong> K\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n, ch\u1eb3ng h\u1ea1n nh\u01b0 10 mm cho M10, \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m \u0111i\u1ec3m tham chi\u1ebfu cho dung sai.<\/li>\n
  • \u1ea2nh h\u01b0\u1edfng c\u1ee7a cao \u0111\u1ed9:<\/strong> C\u00e1c b\u01b0\u1edbc ren th\u00f4 h\u01a1n mang l\u1ea1i \u0111\u1ed9 b\u1ec1n cao h\u01a1n nh\u01b0ng dung sai r\u1ed9ng h\u01a1n, trong khi c\u00e1c b\u01b0\u1edbc ren m\u1ecbn h\u01a1n cho ph\u00e9p \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n v\u1edbi c\u00e1c d\u1ea3i ren ch\u1eb7t h\u01a1n.<\/li>\n
  • C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n c\u00e2n nh\u1eafc v\u1ec1 k\u00edch c\u1ee1:<\/strong> Dung sai \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea5p \u0111\u1ed9 l\u1eafp gh\u00e9p\u2014kh\u00edt, trung b\u00ecnh ho\u1eb7c l\u1ecfng\u2014t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng rung v\u00e0 \u0111\u1ed9 d\u1ec5 d\u00e0ng l\u1eafp r\u00e1p.<\/li>\n
  • T\u00e1c \u0111\u1ed9ng v\u1eadt ch\u1ea5t:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c h\u1ee3p kim, dung sai ph\u1ea3i t\u00ednh \u0111\u1ebfn s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n<\/ul>\n

    C\u00e1c chuy\u00ean gia n\u00ean \u01b0u ti\u00ean nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t, gi\u1ea3m chi ph\u00ed s\u1ea3n xu\u1ea5t v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf. N\u00ean s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 th\u01b0\u1edbc \u0111o micromet ho\u1eb7c th\u01b0\u1edbc \u0111o \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t \u0111\u1ec3 x\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7.<\/p>\n<\/section>\n

    \n

    L\u1edbp dung sai cho c\u00e1c lu\u1ed3ng b\u00ean ngo\u00e0i<\/h2>\n

    C\u00e1c c\u1ea5p dung sai cho ren ngo\u00e0i h\u1ec7 m\u00e9t k\u1ebft h\u1ee3p c\u1ea5p \u0111\u1ed9 (bi\u1ec3u th\u1ecb \u0111\u1ed9 ch\u00ednh x\u00e1c) v\u1edbi v\u1ecb tr\u00ed (bi\u1ec3u th\u1ecb \u0111\u1ed9 l\u1ec7ch so v\u1edbi gi\u00e1 tr\u1ecb danh ngh\u0129a). C\u1ea5p \u0111\u1ed9 4, 6 v\u00e0 8 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u0111\u01b0\u1eddng k\u00ednh l\u1edbn, trong \u0111\u00f3 4 l\u00e0 lo\u1ea1i m\u1ecbn nh\u1ea5t v\u00e0 8 l\u00e0 lo\u1ea1i th\u00f4 nh\u1ea5t. C\u00e1c v\u1ecb tr\u00ed bao g\u1ed3m e (dung sai l\u1edbn), f (trung b\u00ecnh), g (nh\u1ecf) v\u00e0 h (kh\u00f4ng c\u00f3 dung sai). V\u00ed d\u1ee5, 6g \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c lo\u1ea1i bu l\u00f4ng th\u00f4ng d\u1ee5ng, c\u00e2n b\u1eb1ng gi\u1eefa chi ph\u00ed v\u00e0 \u0111\u1ed9 kh\u00edt.<\/p>\n

    Vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng: dung sai nh\u1ecf h\u01a1n cho m\u00e1y m\u00f3c ch\u00ednh x\u00e1c, dung sai l\u1edbn h\u01a1n cho c\u00e1c c\u1ee5m k\u1ebft c\u1ea5u. Ti\u00eau chu\u1ea9n ISO 965 quy \u0111\u1ecbnh nh\u1eefng \u0111i\u1ec1u n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn:<\/p>\n

      \n
    1. 4e \u0111\u1ebfn 8e:<\/strong> Cung c\u1ea5p kho\u1ea3ng h\u1edf \u0111\u00e1ng k\u1ec3, l\u00fd t\u01b0\u1edfng cho c\u00e1c ren m\u1ea1 ho\u1eb7c m\u00f4i tr\u01b0\u1eddng c\u00f3 nguy c\u01a1 nhi\u1ec5m b\u1ea9n.<\/li>\n
    2. 4g \u0111\u1ebfn 8g:<\/strong> Cung c\u1ea5p m\u1ee9c dung sai v\u1eeba ph\u1ea3i, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c kh\u1edbp n\u1ed1i c\u01a1 kh\u00ed ti\u00eau chu\u1ea9n, n\u01a1i m\u00e0 \u0111\u1ed9 r\u01a1 nh\u1eb9 c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/li>\n
    3. T\u1eeb 4 gi\u1edd \u0111\u1ebfn 8 gi\u1edd:<\/strong> \u0110\u1ed9 l\u1ec7ch b\u1eb1ng kh\u00f4ng, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, c\u1ea7n s\u1ef1 l\u1eafp gh\u00e9p ch\u1eb7t ch\u1ebd m\u00e0 kh\u00f4ng c\u00f3 khe h\u1edf.<\/li>\n
    4. T\u00e1c \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec3m s\u1ed1:<\/strong> C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p h\u01a1n gi\u00fap gi\u1ea3m s\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong s\u1ea3n xu\u1ea5t, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady nh\u01b0ng \u0111\u1ed3ng th\u1eddi l\u00e0m t\u0103ng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a quy tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/li>\n<\/ol>\n

      Khi \u00e1p d\u1ee5ng c\u00e1c lo\u1ea1i n\u00e0y, c\u1ea7n xem x\u00e9t chi\u1ec1u d\u00e0i kh\u1edbp n\u1ed1i v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ea3i. \u0110\u1ed1i v\u1edbi c\u00e1c kh\u1edbp n\u1ed1i d\u00e0i, dung sai ch\u1eb7t ch\u1ebd h\u01a1n s\u1ebd ng\u0103n ng\u1eeba s\u1ef1 l\u1ec7ch tr\u1ee5c. Lu\u00f4n tham kh\u1ea3o b\u1ea3ng ISO \u0111\u1ec3 bi\u1ebft c\u00e1c gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3, v\u00ec ch\u00fang thay \u0111\u1ed5i theo b\u01b0\u1edbc ren.<\/p>\n<\/section>\n

      \n

      B\u1ea3ng dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn<\/h2>\n

      Ph\u1ea1m vi dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn ren ngo\u00e0i (\u0111\u01a1n v\u1ecb: mm)<\/p>\n

      \n\n\n\n\n\n\n\n\n\n
      L\u1edbp dung sai<\/th>\nGi\u1edbi h\u1ea1n<\/th>\nM1<\/th>\nM1.1<\/th>\nM1.2<\/th>\nM1.4<\/th>\nM1.6<\/th>\nM1.8<\/th>\nM2<\/th>\nM2.2<\/th>\nM2.5<\/th>\nM3<\/th>\nM3.5<\/th>\n

      <\/p>\n

      		M300<\/th>\n<\/tr>\n
      S\u00e2n b\u00f3ng \u0111\u00e1<\/th>\n0.25<\/td>\n0.2<\/td>\n0.25<\/td>\n0.2<\/td>\n0.25<\/td>\n0.2<\/td>\n0.3<\/td>\n0.2<\/td>\n0.35<\/td>\n0.2<\/td>\n0.35<\/td>\n0.2<\/td>\n0.4<\/td>\n0.25<\/td>\n0.45<\/td>\n0.25<\/td>\n0.45<\/td>\n0.35<\/td>\n0.5<\/td>\n0.35<\/td>\n0.6<\/td>\n0.35<\/td>\n

      <\/p>\n

      		8<\/td>\n6<\/td>\n4<\/td>\n<\/tr>\n<\/thead>\n
      4e Max<\/td>\nT\u1ed1i \u0111a<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n

      <\/p>\n

      		299.575<\/td>\n299.605<\/td>\n299.645<\/td>\n<\/tr>\n
      T\u1ed1i thi\u1ec3u<\/td>\n\/<\/td>\n\/<\/td>\n

      <\/p>\n

      		299.125<\/td>\n299.23<\/td>\n299.345<\/td>\n<\/tr>\n

      <\/p>\n

      T\u1ed1i \u0111a 6g<\/td>\nT\u1ed1i \u0111a<\/td>\n\/<\/td>\n\/<\/td>\n

      <\/p>\n

      		299.575<\/td>\n299.605<\/td>\n299.645<\/td>\n<\/tr>\n
      T\u1ed1i thi\u1ec3u<\/td>\n\/<\/td>\n\/<\/td>\n

      <\/p>\n

      		299.125<\/td>\n299.23<\/td>\n299.345<\/td>\n<\/tr>\n

      <\/tbody>\n<\/table>\n<\/div>\n

      L\u01b0u \u00fd: '\/' bi\u1ec3u th\u1ecb c\u00e1c gi\u00e1 tr\u1ecb kh\u00f4ng \u00e1p d\u1ee5ng cho c\u00e1c t\u1ed5 h\u1ee3p k\u00edch th\u01b0\u1edbc-b\u01b0\u1edbc ren c\u1ee5 th\u1ec3. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh theo ti\u00eau chu\u1ea9n ISO 965-1 v\u1ec1 gi\u1edbi h\u1ea1n \u0111\u01b0\u1eddng k\u00ednh l\u1edbn. C\u1ea7n ki\u1ec3m tra l\u1ea1i b\u1eb1ng d\u1ee5ng c\u1ee5 \u0111o \u0111\u1ec3 s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t.<\/p>\n<\/section>\n

      \n

      Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n<\/h2>\n

      Dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn cho ren ngo\u00e0i h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00f4ng th\u1ee9c ISO 965, k\u1ebft h\u1ee3p c\u00e1c sai l\u1ec7ch c\u01a1 b\u1ea3n v\u00e0 c\u1ea5p dung sai. \u0110\u01b0\u1eddng k\u00ednh l\u1edbn t\u1ed1i \u0111a l\u00e0 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a tr\u1eeb \u0111i sai l\u1ec7ch tr\u00ean (es = 0 \u0111\u1ed1i v\u1edbi v\u1ecb tr\u00ed h), trong khi \u0111\u01b0\u1eddng k\u00ednh l\u1edbn t\u1ed1i thi\u1ec3u l\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t tr\u1eeb \u0111i chi\u1ec1u r\u1ed9ng dung sai (Td).<\/p>\n

        \n
      • Sai l\u1ec7ch c\u01a1 b\u1ea3n:<\/strong> \u0110\u1ed1i v\u1edbi v\u1ecb tr\u00ed g, es = \u2013 (0,3 * P^{0,5} + 0,005 * d), trong \u0111\u00f3 P l\u00e0 b\u01b0\u1edbc ren, d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a.<\/li>\n
      • M\u1ee9c dung sai (Td):<\/strong> Td = 0,001 * (h\u1ec7 s\u1ed1 \u0111i\u1ec3m * (d + L + P)), \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh theo t\u1eebng c\u1ea5p \u0111\u1ed9 (v\u00ed d\u1ee5: c\u1ea5p \u0111\u1ed9 6).<\/li>\n
      • V\u00ed d\u1ee5 cho M10, 6g, b\u01b0\u1edbc ren 1,5 mm:<\/strong> es \u2248 -0,032 mm, Td \u2248 0,150 mm; max d = 10 \u2013 0,032 = 9,968 mm; min d = 9,968 \u2013 0,150 = 9,818 mm.<\/li>\n
      • H\u01b0\u1edbng d\u1eabn:<\/strong> S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ho\u1eb7c b\u1ea3ng ISO \u0111\u1ec3 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c, c\u00f3 x\u00e9t \u0111\u1ebfn chi\u1ec1u d\u00e0i kh\u1edbp n\u1ed1i L \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh dung sai.<\/li>\n<\/ul>\n

        C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o ren \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u ch\u1ee9c n\u0103ng. Tr\u00ean th\u1ef1c t\u1ebf, c\u1ea7n t\u00ednh \u0111\u1ebfn \u0111\u1ed9 d\u00e0y l\u1edbp m\u1ea1 (0,001-0,008 mm) \u0111\u1ed1i v\u1edbi ren \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp v\u00e0 th\u1ef1c hi\u1ec7n ki\u1ec3m so\u00e1t quy tr\u00ecnh th\u1ed1ng k\u00ea \u0111\u1ec3 duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n.<\/p>\n<\/section>\n

        \n

        C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
        \n
        S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u00e1c v\u1ecb tr\u00ed dung sai e, g v\u00e0 h \u0111\u1ed1i v\u1edbi ren ngo\u00e0i l\u00e0 g\u00ec?<\/dt>\n
        V\u1ecb tr\u00ed e cho ph\u00e9p kho\u1ea3ng h\u1edf l\u1edbn nh\u1ea5t, v\u1ecb tr\u00ed g cho ph\u00e9p kho\u1ea3ng h\u1edf nh\u1ecf cho c\u00e1c kh\u1edbp n\u1ed1i th\u00f4ng th\u01b0\u1eddng, v\u00e0 v\u1ecb tr\u00ed h kh\u00f4ng cho ph\u00e9p kho\u1ea3ng h\u1edf cho c\u00e1c c\u1ee5m l\u1eafp r\u00e1p ch\u00ednh x\u00e1c, ch\u1eb7t ch\u1ebd theo ti\u00eau chu\u1ea9n ISO 965.<\/dd>\n
        B\u01b0\u1edbc ren \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn trong ren ngo\u00e0i?<\/dt>\n
        B\u01b0\u1edbc ren l\u1edbn h\u01a1n l\u00e0m t\u0103ng d\u1ea3i dung sai do chi\u1ec1u cao ren l\u1edbn h\u01a1n, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n; b\u01b0\u1edbc ren nh\u1ecf h\u01a1n cho ph\u00e9p dung sai ch\u1eb7t ch\u1ebd h\u01a1n \u0111\u1ec3 t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng rung.<\/dd>\n
        T\u1ea1i sao m\u1ed9t s\u1ed1 m\u1ee5c trong b\u1ea3ng l\u1ea1i hi\u1ec3n th\u1ecb d\u1ea5u '\/' \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 k\u00edch th\u01b0\u1edbc nh\u1ea5t \u0111\u1ecbnh?<\/dt>\n
        D\u1ea5u '\/' bi\u1ec3u th\u1ecb r\u1eb1ng c\u1ea5p dung sai ho\u1eb7c b\u01b0\u1edbc ren c\u1ee5 th\u1ec3 \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 ti\u00eau chu\u1ea9n ho\u1eb7c kh\u00f4ng \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c cho k\u00edch th\u01b0\u1edbc danh ngh\u0129a \u0111\u00f3, theo h\u01b0\u1edbng d\u1eabn c\u1ee7a ISO \u0111\u1ec3 tr\u00e1nh c\u00e1c t\u1ed5 h\u1ee3p kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng.<\/dd>\n
        N\u00ean s\u1eed d\u1ee5ng nh\u1eefng d\u1ee5ng c\u1ee5 \u0111o n\u00e0o \u0111\u1ec3 ki\u1ec3m tra \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i l\u1edbn?<\/dt>\n
        S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o ren d\u1ea1ng v\u00f2ng ho\u1eb7c th\u01b0\u1edbc \u0111o micromet k\u1ef9 thu\u1eadt s\u1ed1 c\u00f3 \u0111\u1ea7u \u0111o h\u00ecnh ch\u1eef V \u0111\u1ec3 ki\u1ec3m tra ch\u00ednh x\u00e1c; \u0111\u1ea3m b\u1ea3o hi\u1ec7u chu\u1ea9n theo ti\u00eau chu\u1ea9n ISO \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00e1ng tin c\u1eady.<\/dd>\n
        L\u1edbp m\u1ea1 v\u00e0 l\u1edbp ph\u1ee7 \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn vi\u1ec7c t\u00ednh to\u00e1n dung sai?<\/dt>\n
        L\u1edbp ph\u1ee7 l\u00e0m t\u0103ng \u0111\u1ed9 d\u00e0y (th\u01b0\u1eddng l\u00e0 0,002-0,010 mm), \u0111\u00f2i h\u1ecfi ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh dung sai tr\u01b0\u1edbc khi m\u1ea1 ch\u1eb7t h\u01a1n \u0111\u1ec3 b\u00f9 l\u1ea1i, \u0111\u1ed3ng th\u1eddi duy tr\u00ec \u0111\u1ed9 kh\u00edt cu\u1ed1i c\u00f9ng theo ti\u00eau chu\u1ea9n ISO 965-4.<\/dd>\n
        Li\u1ec7u c\u00e1c dung sai n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f9y ch\u1ec9nh cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00f4ng ti\u00eau chu\u1ea9n kh\u00f4ng?<\/dt>\n
        C\u00f3, nh\u01b0ng c\u00e1c s\u1eeda \u0111\u1ed5i ph\u1ea3i tu\u00e2n theo nguy\u00ean t\u1eafc ISO; tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt v\u00e0 th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/dd>\n<\/dl>\n<\/section>\n

         <\/p>","protected":false},"excerpt":{"rendered":"

        Introduction This article offers a detailed examination of metric external thread major diameter tolerances, aligned with ISO 965 standards. It serves as a vital resource for mechanical engineers, manufacturers, and designers seeking precise specifications for external threads in bolts and screws. The major diameter, denoted as ‘d’, is crucial for ensuring proper mating with internal […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5806","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5806"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5806\/revisions"}],"predecessor-version":[{"id":5808,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5806\/revisions\/5808"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5806"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}