{"id":5803,"date":"2025-12-25T01:47:39","date_gmt":"2025-12-25T01:47:39","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5803"},"modified":"2025-12-25T01:47:39","modified_gmt":"2025-12-25T01:47:39","slug":"metric-external-thread-pitch-diameter-tolerances-and-calculations","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/metric-external-thread-pitch-diameter-tolerances-and-calculations\/","title":{"rendered":"Dung sai v\u00e0 c\u00e1ch t\u00ednh \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren ngo\u00e0i h\u1ec7 m\u00e9t"},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u v\u1ec1 dung sai ren h\u1ec7 m\u00e9t<\/h2>\n
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Ren v\u00edt h\u1ec7 m\u00e9t, \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a theo GB\/T 197 (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ISO 965), x\u00e1c \u0111\u1ecbnh dung sai cho ren ngo\u00e0i v\u00e0 ren trong \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng thay th\u1ebf v\u00e0 hi\u1ec7u su\u1ea5t trong c\u00e1c c\u1ee5m c\u01a1 kh\u00ed. H\u01b0\u1edbng d\u1eabn n\u00e0y t\u1eadp trung v\u00e0o dung sai \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren ngo\u00e0i (d2), r\u1ea5t quan tr\u1ecdng cho vi\u1ec7c gh\u00e9p n\u1ed1i ch\u00ednh x\u00e1c v\u00e0 ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng. Dung sai n\u00e0y t\u00ednh \u0111\u1ebfn c\u00e1c sai l\u1ec7ch trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t trong khi v\u1eabn duy tr\u00ec s\u1ef1 ph\u00f9 h\u1ee3p v\u1ec1 ch\u1ee9c n\u0103ng, t\u1eeb l\u1ecfng \u0111\u1ebfn ch\u1eb7t t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u \u1ee9ng d\u1ee5ng.<\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh b\u1ea3y c\u1ea5p dung sai (t\u1eeb 3 \u0111\u1ebfn 9) cho \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren v\u00e0 t\u00e1m v\u1ecb tr\u00ed sai l\u1ec7ch c\u01a1 b\u1ea3n (t\u1eeb a \u0111\u1ebfn h) cho ren ngo\u00e0i, d\u1eabn \u0111\u1ebfn 56 t\u1ed5 h\u1ee3p kh\u1ea3 thi. V\u1edbi 349 th\u00f4ng s\u1ed1 ren t\u1eeb M1x0.2 \u0111\u1ebfn M300x8, \u0111i\u1ec1u n\u00e0y t\u1ea1o ra c\u00e1c t\u1eadp d\u1eef li\u1ec7u r\u1ea5t l\u1edbn. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn c\u00e1c k\u00edch th\u01b0\u1edbc th\u00f4ng d\u1ee5ng nh\u01b0 M2 \u0111\u1ebfn M24 v\u1edbi dung sai 6g. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p c\u00e1c ph\u00e9p t\u00ednh chi ti\u1ebft, b\u1ea3ng bi\u1ec3u cho c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c ch\u1ecdn v\u00e0 h\u01b0\u1edbng d\u1eabn \u0111\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 v\u00e0 \u0111\u1ed9 tin c\u1eady trong thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n

Hi\u1ec3u r\u00f5 c\u00e1c dung sai n\u00e0y gi\u00fap ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 tr\u01b0\u1ee3t ren ho\u1eb7c l\u1eafp r\u00e1p l\u1ecfng l\u1ebbo, n\u00e2ng cao tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a s\u1ea3n ph\u1ea9m trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y m\u00f3c.<\/p>\n<\/section>\n

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\u0110\u1ecbnh ngh\u0129a v\u00e0 \u00fd ngh\u0129a c\u1ee7a \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren (d2)<\/h2>\n

\u0110\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren (d2) c\u1ee7a ren ngo\u00e0i h\u1ec7 m\u00e9t l\u00e0 \u0111\u01b0\u1eddng k\u00ednh h\u00ecnh tr\u1ee5 t\u01b0\u1edfng t\u01b0\u1ee3ng t\u1ea1i \u0111i\u1ec3m m\u00e0 chi\u1ec1u r\u1ed9ng ren b\u1eb1ng chi\u1ec1u r\u1ed9ng r\u00e3nh, \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c d2 = d \u2013 0,649519 * P, trong \u0111\u00f3 d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i danh ngh\u0129a v\u00e0 P l\u00e0 b\u01b0\u1edbc ren. K\u00edch th\u01b0\u1edbc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi s\u1ef1 \u0103n kh\u1edbp c\u1ee7a ren, v\u00ec n\u00f3 quy\u1ebft \u0111\u1ecbnh di\u1ec7n t\u00edch ti\u1ebfp x\u00fac hi\u1ec7u qu\u1ea3 v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00f4-men xo\u1eafn, \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng l\u00e0m k\u00edn.<\/p>\n

Trong k\u1ef9 thu\u1eadt, dung sai d2 ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0103n kh\u1edbp ho\u00e0n h\u1ea3o v\u1edbi ren trong, gi\u1ea3m thi\u1ec3u \u0111\u1ed9 r\u01a1 trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u00ednh x\u00e1c ho\u1eb7c cho ph\u00e9p ph\u1ee7 l\u1edbp ch\u1ed1ng \u0103n m\u00f2n trong c\u00e1c thi\u1ebft k\u1ebf. Sai l\u1ec7ch so v\u1edbi dung sai quy \u0111\u1ecbnh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c khi l\u1eafp r\u00e1p ho\u1eb7c gi\u1ea3m kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i. V\u00ed d\u1ee5, trong m\u00f4i tr\u01b0\u1eddng rung \u0111\u1ed9ng m\u1ea1nh, dung sai ch\u1eb7t h\u01a1n (c\u1ea5p th\u1ea5p h\u01a1n) ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng l\u1ecfng l\u1ebbo, trong khi dung sai l\u1ecfng h\u01a1n (c\u1ea5p cao h\u01a1n) gi\u00fap vi\u1ec7c l\u1eafp r\u00e1p d\u1ec5 d\u00e0ng h\u01a1n trong s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t.<\/p>\n

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  • T\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c \u0111o l\u01b0\u1eddng:<\/strong> S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o ren ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p ba d\u00e2y \u0111\u1ec3 ki\u1ec3m tra, \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n theo ti\u00eau chu\u1ea9n GB\/T.<\/li>\n
  • Vai tr\u00f2 trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p ph\u00f9 h\u1ee3p:<\/strong> d2 t\u01b0\u01a1ng t\u00e1c v\u1edbi dung sai \u0111\u01b0\u1eddng k\u00ednh ch\u00ednh \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5p ren t\u1ed5ng th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 6g cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng chung.<\/li>\n
  • T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t:<\/strong> Ki\u1ec3m so\u00e1t d2 ch\u00ednh x\u00e1c gi\u00fap t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1eaft.<\/li>\n<\/ul>\n

    C\u00e1c k\u1ef9 s\u01b0 n\u00ean \u01b0u ti\u00ean d2 trong c\u00e1c thi\u1ebft k\u1ebf \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, tham kh\u1ea3o ti\u00eau chu\u1ea9n GB\/T 197 \u0111\u1ec3 bi\u1ebft c\u00e1c gi\u1edbi h\u1ea1n to\u00e0n di\u1ec7n.<\/p>\n<\/section>\n

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    M\u1ee9c dung sai v\u00e0 \u0111\u1ed9 l\u1ec7ch c\u01a1 b\u1ea3n<\/h2>\n

    Ti\u00eau chu\u1ea9n GB\/T 197 quy \u0111\u1ecbnh c\u00e1c c\u1ea5p dung sai t\u1eeb 3 \u0111\u1ebfn 9 cho \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren, trong \u0111\u00f3 s\u1ed1 nh\u1ecf h\u01a1n bi\u1ec3u th\u1ecb dung sai nh\u1ecf h\u01a1n (ch\u1eb7t h\u01a1n) ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, v\u00e0 s\u1ed1 l\u1edbn h\u01a1n bi\u1ec3u th\u1ecb dung sai l\u1edbn h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng th\u01b0\u1eddng. \u0110\u1ed9 l\u1ec7ch c\u01a1 b\u1ea3n (a \u0111\u1ebfn h) x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a v\u00f9ng dung sai so v\u1edbi k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n: 'a' cung c\u1ea5p m\u1ee9c dung sai l\u1edbn nh\u1ea5t d\u01b0\u1edbi k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n, trong khi 'h' c\u00f3 \u0111\u1ed9 l\u1ec7ch b\u1eb1ng kh\u00f4ng \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ed1i l\u1eafp gh\u00e9p ch\u1eb7t.<\/p>\n

    C\u00e1c t\u1ed5 h\u1ee3p nh\u01b0 6g l\u00e0 ti\u00eau chu\u1ea9n cho ren ngo\u00e0i, mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa kh\u1ea3 n\u0103ng s\u1ea3n xu\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t. V\u00ed d\u1ee5, c\u1ea5p 6 v\u1edbi \u0111\u1ed9 l\u1ec7ch g t\u1ea1o ra \u0111\u1ed9 l\u1ec7ch \u00e2m nh\u1ecf, l\u00fd t\u01b0\u1edfng cho ren m\u1ea1 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7.<\/p>\n

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    1. Ch\u1ecdn c\u1ea5p \u0111\u1ed9 d\u1ef1a tr\u00ean nhu c\u1ea7u \u0111\u1ed9 ch\u00ednh x\u00e1c: C\u1ea5p \u0111\u1ed9 4 cho c\u01a1 kh\u00ed ch\u00ednh x\u00e1c cao, c\u1ea5p \u0111\u1ed9 8 cho bu l\u00f4ng k\u1ebft c\u1ea5u.<\/li>\n
    2. Ch\u1ecdn \u0111\u1ed9 l\u1ec7ch cho ki\u1ec3u d\u00e1ng: 'e' ho\u1eb7c 'f' cho ki\u1ec3u d\u00e1ng r\u1ed9ng r\u00e3i, 'g' ho\u1eb7c 'h' cho ki\u1ec3u d\u00e1ng v\u1eeba v\u1eb7n \u0111\u1ebfn \u00f4m s\u00e1t.<\/li>\n
    3. H\u00e3y xem x\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a cao \u0111\u1ed9: Cao \u0111\u1ed9 c\u00e0ng nh\u1ecf th\u00ec dung sai c\u00e0ng nh\u1ecf \u0111\u1ec3 duy tr\u00ec t\u00ednh c\u00e2n \u0111\u1ed1i.<\/li>\n<\/ol>\n

      H\u1ec7 th\u1ed1ng n\u00e0y \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch to\u00e0n c\u1ea7u, ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n ISO 965 v\u1ec1 th\u01b0\u01a1ng m\u1ea1i v\u00e0 ti\u00eau chu\u1ea9n h\u00f3a qu\u1ed1c t\u1ebf.<\/p>\n<\/section>\n

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      Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n dung sai d2<\/h2>\n

      \u0110\u1ec3 t\u00ednh to\u00e1n gi\u1edbi h\u1ea1n d2, h\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren c\u01a1 b\u1ea3n: d2_basic = d \u2013 0,649519 * P. Gi\u1edbi h\u1ea1n tr\u00ean = d2_basic + es (\u0111\u1ed9 l\u1ec7ch c\u01a1 b\u1ea3n, tr\u00ean). Gi\u1edbi h\u1ea1n d\u01b0\u1edbi = gi\u1edbi h\u1ea1n tr\u00ean \u2013 Td2 (gi\u00e1 tr\u1ecb dung sai cho c\u1ea5p \u0111\u1ed9).<\/p>\n

      Td2 \u0111\u01b0\u1ee3c suy ra t\u1eeb c\u00e1c c\u00f4ng th\u1ee9c trong GB\/T 197: \u0110\u1ed1i v\u1edbi c\u1ea5p 6, Td2 \u2248 0,090 * P^(2\/3) \u0111\u1ed1i v\u1edbi c\u00e1c b\u01b0\u1edbc r\u0103ng th\u00f4. \u0110\u1ed9 l\u1ec7ch (es) thay \u0111\u1ed5i: \u0110\u1ed1i v\u1edbi 6g, es = \u2013 (0,012 \u0111\u1ebfn 0,042) mm t\u00f9y thu\u1ed9c v\u00e0o P.<\/p>\n

      V\u00ed d\u1ee5: \u0110\u1ed1i v\u1edbi M8x1.25 6g, d2_basic = 8 \u2013 0.649519*1.25 \u2248 7.188 mm. es = -0.028 mm, Td2 = 0.118 mm. Tr\u00ean: 7.188 \u2013 0.028 = 7.160 mm. D\u01b0\u1edbi: 7.160 \u2013 0.118 = 7.042 mm.<\/p>\n

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      • H\u01b0\u1edbng d\u1eabn t\u00ednh to\u00e1n t\u1eebng b\u01b0\u1edbc:<\/strong> X\u00e1c \u0111\u1ecbnh P, ch\u1ecdn c\u1ea5p \u0111\u1ed9\/\u0111\u1ed9 l\u1ec7ch chu\u1ea9n, \u00e1p d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c t\u1eeb b\u1ea3ng chu\u1ea9n.<\/li>\n
      • \u0110i\u1ec1u ch\u1ec9nh:<\/strong> \u0110\u1ed1i v\u1edbi ren m\u1ea1, h\u00e3y s\u1eed d\u1ee5ng dung sai tr\u01b0\u1edbc khi m\u1ea1 \u0111\u1ec3 t\u00ednh \u0111\u1ebfn s\u1ef1 t\u00edch t\u1ee5 v\u1eadt li\u1ec7u.<\/li>\n
      • C\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m:<\/strong> \u0110\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao, h\u00e3y s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m CAD ho\u1eb7c m\u00e1y t\u00ednh tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n GB\/T 197.<\/li>\n<\/ul>\n

        C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c ren \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, gi\u1ea3m thi\u1ec3u vi\u1ec7c l\u00e0m l\u1ea1i v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp r\u00e1p.<\/p>\n<\/section>\n

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        B\u1ea3ng dung sai to\u00e0n di\u1ec7n<\/h2>\n

        B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y tr\u00edch d\u1eabn c\u00e1c dung sai d2 quan tr\u1ecdng cho c\u00e1c lo\u1ea1i ren ngo\u00e0i h\u1ec7 m\u00e9t th\u00f4ng d\u1ee5ng theo ti\u00eau chu\u1ea9n GB\/T 197. D\u1eef li\u1ec7u bao g\u1ed3m gi\u00e1 tr\u1ecb t\u1ed1i \u0111a v\u00e0 t\u1ed1i thi\u1ec3u cho c\u00e1c lo\u1ea1i ren v\u00e0 \u0111\u1ed9 l\u1ec7ch \u0111\u00e3 ch\u1ecdn. \u0110\u1ec3 xem to\u00e0n b\u1ed9 d\u1eef li\u1ec7u, vui l\u00f2ng tham kh\u1ea3o ti\u00eau chu\u1ea9n. \u0110\u01a1n v\u1ecb t\u00ednh b\u1eb1ng mm.<\/p>\n

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        <\/div>\n\n\n\n\n\n\n\n\n
        S\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/th>\nM1x0.25<\/th>\nM1.1\u00d70.25<\/th>\nM1.2\u00d70.25<\/th>\nM1.4\u00d70.3<\/th>\nM1.6\u00d70.35<\/th>\nM1.8\u00d70.35<\/th>\nM2x0.4<\/th>\nM2.2\u00d70.45<\/th>\nM2.5\u00d70.45<\/th>\nM3x0.5<\/th>\nM3.5\u00d70.6<\/th>\nM4x0.7<\/th>\nM4.5\u00d70.75<\/th>\nM5x0.8<\/th>\n<\/tr>\n
        T\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\nT\u1ed1i \u0111a<\/th>\nT\u1ed1i thi\u1ec3u<\/th>\n<\/tr>\n<\/thead>\n
        3a<\/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\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n\/<\/td>\n<\/tr>\n
        T\u1ed1i \u0111a 6g<\/td>\n0.838<\/td>\n0.838<\/td>\n0.926<\/td>\n0.926<\/td>\n1.014<\/td>\n1.014<\/td>\n1.175<\/td>\n1.175<\/td>\n1.336<\/td>\n1.336<\/td>\n1.497<\/td>\n1.497<\/td>\n1.658<\/td>\n1.658<\/td>\n1.819<\/td>\n1.819<\/td>\n2.068<\/td>\n2.068<\/td>\n2.393<\/td>\n2.393<\/td>\n2.718<\/td>\n2.718<\/td>\n3.043<\/td>\n3.043<\/td>\n3.368<\/td>\n3.368<\/td>\n3.853<\/td>\n3.853<\/td>\n4.338<\/td>\n<\/tr>\n
        T\u1ed1i thi\u1ec3u 6g<\/td>\n0.774<\/td>\n0.774<\/td>\n0.854<\/td>\n0.854<\/td>\n0.934<\/td>\n0.934<\/td>\n1.085<\/td>\n1.085<\/td>\n1.236<\/td>\n1.236<\/td>\n1.387<\/td>\n1.387<\/td>\n1.538<\/td>\n1.538<\/td>\n1.689<\/td>\n1.689<\/td>\n1.928<\/td>\n1.928<\/td>\n2.228<\/td>\n2.228<\/td>\n2.528<\/td>\n2.528<\/td>\n2.828<\/td>\n2.828<\/td>\n3.128<\/td>\n3.128<\/td>\n3.588<\/td>\n3.588<\/td>\n4.048<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        <\/div>\n<\/div>\n<\/div>\n<\/div>\n

        L\u01b0u \u00fd: '\/' bi\u1ec3u th\u1ecb kh\u00f4ng \u00e1p d\u1ee5ng ho\u1eb7c kh\u00f4ng c\u00f3 s\u1eb5n theo ti\u00eau chu\u1ea9n cho k\u00edch th\u01b0\u1edbc\/dung sai \u0111\u00f3. \u0110\u1ed1i v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n nh\u01b0 M8, d2 t\u1ed1i \u0111a cho 6g l\u00e0 7,160 mm, t\u1ed1i thi\u1ec3u l\u00e0 7,042 mm. S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n ch\u00ednh th\u1ee9c GB\/T 197 \u0111\u1ec3 x\u00e1c minh \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<\/section>\n

        \n

        \u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n v\u00e0 h\u01b0\u1edbng d\u1eabn<\/h2>\n

        Tr\u00ean th\u1ef1c t\u1ebf, h\u00e3y ch\u1ecdn dung sai d\u1ef1a tr\u00ean y\u00eau c\u1ea7u l\u1eafp r\u00e1p: 6g cho c\u00e1c lo\u1ea1i \u1ed1c v\u00edt th\u00f4ng th\u01b0\u1eddng, 4h cho c\u00e1c d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c. C\u1ea7n xem x\u00e9t s\u1ef1 gi\u00e3n n\u1edf v\u1eadt li\u1ec7u, ch\u1ea5t b\u00f4i tr\u01a1n v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng. \u0110\u1ed1i v\u1edbi ren m\u1ea1, \u0111i\u1ec1u ch\u1ec9nh l\u1edbp m\u1ea1 tr\u01b0\u1edbc d2 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ed9 d\u00e0y 0,002-0,01 mm.<\/p>\n

        H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra: S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n theo ti\u00eau chu\u1ea9n GB\/T. Trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t, gi\u00e1m s\u00e1t kh\u1ea3 n\u0103ng c\u1ee7a quy tr\u00ecnh (CpK >1,33) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p. Nh\u1eefng sai s\u00f3t th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m b\u1ecf qua \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u01b0\u1edbc ren \u0111\u1ebfn dung sai, d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00f4ng kh\u1edbp.<\/p>\n

          \n
        1. Giai \u0111o\u1ea1n thi\u1ebft k\u1ebf: T\u00edch h\u1ee3p dung sai v\u00e0o m\u00f4 h\u00ecnh CAD \u0111\u1ec3 m\u00f4 ph\u1ecfng.<\/li>\n
        2. Gia c\u00f4ng: S\u1eed d\u1ee5ng m\u00e1y ti\u1ec7n ren CNC v\u1edbi d\u1ee5ng c\u1ee5 b\u00f9 tr\u1eeb \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/li>\n
        3. Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng: Th\u1ef1c hi\u1ec7n l\u1ea5y m\u1eabu th\u1ed1ng k\u00ea theo ti\u00eau chu\u1ea9n ISO 2859.<\/li>\n
        4. Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1: N\u1ebfu c\u00e1c kh\u1edbp n\u1ed1i b\u1ecb l\u1ecfng, h\u00e3y ki\u1ec3m tra \u0111\u1ed9 l\u1ec7ch d2; si\u1ebft ch\u1eb7t n\u1ebfu c\u1ea7n.<\/li>\n<\/ol>\n

          Tu\u00e2n th\u1ee7 c\u00e1c quy tr\u00ecnh n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t, gi\u1ea3m chi ph\u00ed v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf.<\/p>\n<\/section>\n

          \n

          C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n
          \n
          C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ednh \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren d2 l\u00e0 g\u00ec?<\/dt>\n
          \u0110\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren c\u01a1 b\u1ea3n l\u00e0 d2 = d \u2013 0,649519 * P, trong \u0111\u00f3 d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a v\u00e0 P l\u00e0 b\u01b0\u1edbc ren. \u0110i\u1ec1u ch\u1ec9nh theo \u0111\u1ed9 l\u1ec7ch v\u00e0 dung sai cho c\u00e1c gi\u1edbi h\u1ea1n.<\/dd>\n<\/dl>\n

          \n

          \n
          T\u1ea1i sao 6g l\u1ea1i l\u00e0 dung sai ph\u1ed5 bi\u1ebfn nh\u1ea5t cho ren ngo\u00e0i h\u1ec7 m\u00e9t?<\/dt>\n
          6g mang l\u1ea1i s\u1ef1 v\u1eeba v\u1eb7n c\u00e2n b\u1eb1ng v\u1edbi kho\u1ea3ng tr\u1ed1ng v\u1eeba ph\u1ea3i cho vi\u1ec7c m\u1ea1 v\u00e0 d\u1ec5 d\u00e0ng l\u1eafp r\u00e1p, ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt chung theo ti\u00eau chu\u1ea9n GB\/T 197.<\/dd>\n<\/dl>\n

          \n

          \n
          M\u1ee9c \u0111\u1ed9 dung sai \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn chi ph\u00ed s\u1ea3n xu\u1ea5t nh\u01b0 th\u1ebf n\u00e0o?<\/dt>\n
          C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n (v\u00ed d\u1ee5: 3-5) \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd h\u01a1n, l\u00e0m t\u0103ng chi ph\u00ed do y\u00eau c\u1ea7u d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c; c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 c\u1ea5p \u0111\u1ed9 cao h\u01a1n (7-9) cho ph\u00e9p l\u1eafp r\u00e1p l\u1ecfng h\u01a1n, gi\u1ea3m chi ph\u00ed.<\/dd>\n<\/dl>\n

          \n

          \n
          T\u00f4i c\u00f3 th\u1ec3 thay th\u1ebf dung sai GB\/T 197 b\u1eb1ng dung sai ISO 965 \u0111\u01b0\u1ee3c kh\u00f4ng?<\/dt>\n
          \u0110\u00fang v\u1eady, v\u00ec ti\u00eau chu\u1ea9n GB\/T 197 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ISO 965-1, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng qu\u1ed1c t\u1ebf.<\/dd>\n<\/dl>\n

          \n

          \n
          C\u1ea7n \u0111i\u1ec1u ch\u1ec9nh nh\u1eefng g\u00ec \u0111\u1ed1i v\u1edbi ren c\u00f3 b\u01b0\u1edbc ren nh\u1ecf?<\/dt>\n
          C\u00e1c b\u01b0\u1edbc ren nh\u1ecf c\u00f3 dung sai nh\u1ecf h\u01a1n t\u01b0\u01a1ng \u1ee9ng; h\u00e3y t\u00ednh to\u00e1n Td2 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c d\u00e0nh ri\u00eang cho t\u1eebng b\u01b0\u1edbc ren \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u1ef1 kh\u1edbp n\u1ed1i.<\/dd>\n<\/dl>\n

          \n

          \n
          L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111o d2 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c?<\/dt>\n
          S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ba d\u00e2y ho\u1eb7c th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren; \u0111\u1ea3m b\u1ea3o c\u00e1c d\u00e2y c\u00f3 b\u01b0\u1edbc ren kh\u1edbp nhau v\u00e0 hi\u1ec7u chu\u1ea9n d\u1ee5ng c\u1ee5 theo c\u00e1c ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 truy v\u1ebft.<\/dd>\n<\/dl>\n<\/section>","protected":false},"excerpt":{"rendered":"

          Introduction to Metric Thread Tolerances Metric screw threads, standardized under GB\/T 197 (equivalent to ISO 965), define tolerances for external and internal threads to ensure interchangeability and performance in mechanical assemblies. This guide focuses on external thread pitch diameter (d2) tolerances, which are critical for proper mating and load distribution. Tolerances account for manufacturing variations […]<\/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-5803","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\/5803","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=5803"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5803\/revisions"}],"predecessor-version":[{"id":5805,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5803\/revisions\/5805"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5803"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}