{"id":5783,"date":"2025-12-25T01:19:36","date_gmt":"2025-12-25T01:19:36","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5783"},"modified":"2025-12-25T01:19:36","modified_gmt":"2025-12-25T01:19:36","slug":"metric-thread-major-diameter-tolerances-calculations","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/metric-thread-major-diameter-tolerances-calculations\/","title":{"rendered":"Dung sai v\u00e0 c\u00e1ch t\u00ednh \u0111\u01b0\u1eddng k\u00ednh l\u1edbn c\u1ee7a ren h\u1ec7 m\u00e9t"},"content":{"rendered":"
\n

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

B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p t\u1ed5ng quan to\u00e0n di\u1ec7n v\u1ec1 dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn c\u1ee7a ren h\u1ec7 m\u00e9t, t\u1eadp trung v\u00e0o ren trong theo ti\u00eau chu\u1ea9n ISO 965. N\u00f3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o thi\u1ebft y\u1ebfu cho c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t, tr\u00ecnh b\u00e0y chi ti\u1ebft c\u00e1c gi\u00e1 tr\u1ecb dung sai v\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 hi\u1ec7u su\u1ea5t trong c\u00e1c c\u1ee5m l\u1eafp r\u00e1p c\u01a1 kh\u00ed. N\u1ed9i dung \u0111\u01b0\u1ee3c tr\u00edch d\u1eabn t\u1eeb c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, cung c\u1ea5p d\u1eef li\u1ec7u ch\u00ednh x\u00e1c cho c\u00e1c k\u00edch th\u01b0\u1edbc danh ngh\u0129a t\u1eeb M1 \u0111\u1ebfn M300.<\/p>\n

\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1c lo\u1ea1i ren h\u1ec7 m\u00e9t, bao g\u1ed3m \u0111\u01b0\u1eddng k\u00ednh l\u1edbn, b\u01b0\u1edbc ren v\u00e0 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, h\u00e3y tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan nh\u01b0 ISO 68-1 v\u00e0 ISO 261.<\/p>\n<\/section>\n

\n

Hi\u1ec3u v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh ren h\u1ec7 m\u00e9t<\/h2>\n

Trong h\u1ec7 ren m\u00e9t, \u0111\u01b0\u1eddng k\u00ednh l\u1edbn (D \u0111\u1ed1i v\u1edbi ren trong) bi\u1ec3u th\u1ecb \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t c\u1ee7a bi\u00ean d\u1ea1ng ren. \u0110\u1ed1i v\u1edbi ren trong \u1edf \u0111ai \u1ed1c ho\u1eb7c l\u1ed7 ren, \u0111\u00e2y l\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a l\u1ed7 h\u00ecnh tr\u1ee5 tr\u01b0\u1edbc khi t\u1ea1o ren. Dung sai \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0103n kh\u1edbp ch\u00ednh x\u00e1c v\u1edbi ren ngo\u00e0i, ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 k\u1eb9t ho\u1eb7c l\u1ecfng.<\/p>\n

    \n
  • K\u00edch th\u01b0\u1edbc danh ngh\u0129a:<\/strong> \u0110\u01b0\u1ee3c k\u00fd hi\u1ec7u b\u1eb1ng ch\u1eef M theo sau l\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t t\u00ednh b\u1eb1ng mm, v\u00ed d\u1ee5: M10.<\/li>\n
  • S\u00e2n b\u00f3ng \u0111\u00e1:<\/strong> Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh ren \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng l\u1eafp r\u00e1p.<\/li>\n
  • V\u1ecb tr\u00ed dung sai:<\/strong> Bi\u1ec3u th\u1ecb s\u1ef1 sai l\u1ec7ch so v\u1edbi gi\u00e1 tr\u1ecb danh ngh\u0129a, v\u1edbi c\u00e1c c\u1ea5p \u0111\u1ed9 nh\u01b0 H cho tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng c\u00f3 sai l\u1ec7ch v\u00e0 G cho tr\u01b0\u1eddng h\u1ee3p c\u00f3 sai l\u1ec7ch.<\/li>\n<\/ul>\n

    \u0110\u1ed9 ch\u00ednh x\u00e1c dung sai l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 m\u00e1y m\u00f3c \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng thay th\u1ebf l\u1eabn nhau v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i.<\/p>\n<\/section>\n

    \n

    C\u00e1c l\u1edbp dung sai cho c\u00e1c lu\u1ed3ng n\u1ed9i b\u1ed9<\/h2>\n

    C\u00e1c c\u1ea5p dung sai cho ren trong h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u b\u1eb1ng c\u00e1c s\u1ed1 (t\u1eeb 4 \u0111\u1ebfn 8) ch\u1ec9 c\u1ea5p \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 c\u00e1c ch\u1eef c\u00e1i (G ho\u1eb7c H) ch\u1ec9 v\u1ecb tr\u00ed. S\u1ed1 c\u00e0ng nh\u1ecf th\u00ec dung sai c\u00e0ng ch\u00ednh x\u00e1c.<\/p>\n

      \n
    1. T\u1eeb 4G l\u00ean 8G:<\/strong> Nh\u1eefng \u0111i\u1ec1u n\u00e0y mang l\u1ea1i m\u1ed9t kho\u1ea3n tr\u1ee3 c\u1ea5p t\u00edch c\u1ef1c, ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u s\u1ef1 ch\u1ea5p thu\u1eadn.<\/li>\n
    2. T\u1eeb 4 gi\u1edd \u0111\u1ebfn 8 gi\u1edd:<\/strong> Nh\u1eefng lo\u1ea1i n\u00e0y kh\u00f4ng c\u00f3 \u0111\u1ed9 co gi\u00e3n, l\u00fd t\u01b0\u1edfng cho c\u00e1c k\u00edch c\u1ee1 ti\u00eau chu\u1ea9n.<\/li>\n
    3. H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn:<\/strong> S\u1eed d\u1ee5ng lo\u1ea1i 6H cho c\u00e1c lo\u1ea1i \u0111ai \u1ed1c th\u00f4ng d\u1ee5ng; c\u00e1c lo\u1ea1i m\u1ecbn h\u01a1n nh\u01b0 4H d\u00e0nh cho c\u00e1c nhu c\u1ea7u \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/li>\n<\/ol>\n

      C\u00e1c b\u1ea3ng b\u00ean d\u01b0\u1edbi li\u1ec7t k\u00ea c\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u cho \u0111\u01b0\u1eddng k\u00ednh l\u1edbn D, \u0111\u1ea3m b\u1ea3o h\u00ecnh d\u1ea1ng ren v\u1eabn n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p \u0111\u1ec3 \u0103n kh\u1edbp hi\u1ec7u qu\u1ea3.<\/p>\n<\/section>\n

      \n

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

      \u0110\u01b0\u1eddng k\u00ednh ren trong l\u1edbn (D) Gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u (\u0110\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
      \u0110\u01b0\u1eddng k\u00ednh l\u1edbn c\u1ee7a ren trong D<\/td>\nT\u1ed1i thi\u1ec3u 4G<\/td>\n1.018<\/td>\n1.017<\/td>\n1.118<\/td>\n1.117<\/td>\n1.218<\/td>\n1.217<\/td>\n1.418<\/td>\n1.417<\/td>\n1.619<\/td>\n1.617<\/td>\n1.819<\/td>\n1.817<\/td>\n2.019<\/td>\n2.018<\/td>\n2.22<\/td>\n2.218<\/td>\n2.52<\/td>\n2.519<\/td>\n3.02<\/td>\n3.019<\/td>\n3.521<\/td>\n3.519<\/td>\n

      <\/p>\n

      		300.1<\/td>\n300.08<\/td>\n300.06<\/td>\n<\/tr>\n
      T\u1ed1i thi\u1ec3u 5G<\/td>\n1.018<\/td>\n1.017<\/td>\n

      <\/p>\n

      		300.1<\/td>\n300.08<\/td>\n300.06<\/td>\n<\/tr>\n
      T\u1ed1i thi\u1ec3u 6G<\/td>\n1.018<\/td>\n1.017<\/td>\n

      <\/p>\n

      		300.1<\/td>\n300.08<\/td>\n300.06<\/td>\n<\/tr>\n

      <\/p>\n

      8 gi\u1edd t\u1ed1i thi\u1ec3u<\/td>\n1.018<\/td>\n1.017<\/td>\n

      <\/p>\n

      		300.1<\/td>\n300.08<\/td>\n300.06<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      L\u01b0u \u00fd: C\u00e1c gi\u00e1 tr\u1ecb l\u00e0 k\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u cho \u0111\u01b0\u1eddng k\u00ednh l\u1edbn D. \u0110\u1ec3 bi\u1ebft \u0111\u1ea7y \u0111\u1ee7 c\u00e1c d\u1ea3i dung sai, h\u00e3y tham kh\u1ea3o ti\u00eau chu\u1ea9n ISO 965-1. B\u1ea3ng n\u00e0y bao g\u1ed3m c\u00e1c b\u01b0\u1edbc ren th\u00f4ng d\u1ee5ng; h\u00e3y tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n \u0111\u1ec3 bi\u1ebft th\u00eam c\u00e1c bi\u1ebfn th\u1ec3 kh\u00e1c.<\/p>\n<\/section>\n

      \n

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

      Dung sai cho \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00e1c c\u00f4ng th\u1ee9c t\u1eeb ti\u00eau chu\u1ea9n ISO 965. \u0110\u1ed1i v\u1edbi ren trong, dung sai T \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u1ea5p ren v\u00e0 chi\u1ec1u d\u00e0i \u0103n kh\u1edbp.<\/p>\n

        \n
      • \u0110\u1ed9 l\u1ec7ch c\u01a1 b\u1ea3n (es ho\u1eb7c EI):<\/strong> \u0110\u1ed1i v\u1edbi v\u1ecb tr\u00ed H, EI = 0; \u0111\u1ed1i v\u1edbi v\u1ecb tr\u00ed G, EI d\u01b0\u01a1ng.<\/li>\n
      • Gi\u00e1 tr\u1ecb dung sai:<\/strong> T = 0,001 * (d^{0,5} + 0,5 * P + L\/10), trong \u0111\u00f3 d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, P l\u00e0 b\u01b0\u1edbc ren, L l\u00e0 chi\u1ec1u d\u00e0i \u0103n kh\u1edbp.<\/li>\n
      • \u0110i\u1ec3m t\u1ed1i thi\u1ec3u D:<\/strong> Gi\u00e1 tr\u1ecb danh ngh\u0129a + EI (d\u00e0nh cho n\u1ed9i b\u1ed9).<\/li>\n<\/ul>\n

        V\u00ed d\u1ee5: \u0110\u1ed1i v\u1edbi ren M10 c\u00f3 chi\u1ec1u cao 6H v\u00e0 b\u01b0\u1edbc ren 1,5 mm, \u0111\u01b0\u1eddng k\u00ednh t\u1ed1i thi\u1ec3u D = 10,000 mm (v\u00ec EI=0). Lu\u00f4n ki\u1ec3m tra l\u1ea1i b\u1eb1ng d\u1ee5ng c\u1ee5 \u0111o tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t.<\/p>\n<\/section>\n

        \n

        C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
        \n
        S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa v\u1ecb tr\u00ed dung sai G v\u00e0 H l\u00e0 g\u00ec?<\/dt>\n
        G cung c\u1ea5p \u0111\u1ed9 l\u1ec7ch d\u01b0\u01a1ng cho dung sai, trong khi H c\u00f3 \u0111\u1ed9 l\u1ec7ch b\u1eb1ng kh\u00f4ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 kh\u00edt c\u1ee7a s\u1ea3n ph\u1ea9m.<\/dd>\n
        T\u00f4i n\u00ean ch\u1ecdn c\u1ea5p dung sai ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh nh\u01b0 th\u1ebf n\u00e0o?<\/dt>\n
        H\u00e3y l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean nhu c\u1ea7u v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c: 6H cho ti\u00eau chu\u1ea9n, 4H\/5H cho \u0111\u1ed9 ch\u00ednh x\u00e1c cao, c\u00f3 t\u00ednh \u0111\u1ebfn chi ph\u00ed v\u00e0 y\u00eau c\u1ea7u l\u1eafp r\u00e1p.<\/dd>\n
        T\u1ea1i sao l\u1ea1i c\u00f3 c\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea cho \u0111\u01b0\u1eddng k\u00ednh l\u1edbn b\u00ean trong?<\/dt>\n
        C\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u \u0111\u1ea3m b\u1ea3o \u0111\u1ec9nh ren kh\u00f4ng g\u00e2y c\u1ea3n tr\u1edf, duy tr\u00ec khe h\u1edf cho c\u00e1c b\u1ed9 ph\u1eadn gh\u00e9p n\u1ed1i theo ti\u00eau chu\u1ea9n ISO.<\/dd>\n
        Li\u1ec7u c\u00e1c dung sai n\u00e0y c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho c\u00e1c b\u01b0\u1edbc ren t\u00f9y ch\u1ec9nh kh\u00f4ng?<\/dt>\n
        \u0110\u00fang v\u1eady, nh\u01b0ng c\u1ea7n ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh b\u01b0\u1edbc ren b\u1eb1ng c\u00f4ng th\u1ee9c ISO khi t\u00ednh to\u00e1n; tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n cho k\u00edch th\u01b0\u1edbc kh\u00f4ng ti\u00eau chu\u1ea9n.<\/dd>\n
        C\u1ea7n nh\u1eefng d\u1ee5ng c\u1ee5 n\u00e0o \u0111\u1ec3 \u0111o dung sai \u0111\u01b0\u1eddng k\u00ednh l\u1edbn?<\/dt>\n
        S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o ren d\u1ea1ng n\u00fat ho\u1eb7c th\u01b0\u1edbc \u0111o micromet c\u00f3 \u0111\u1ea7u \u0111o ren \u0111\u1ec3 ki\u1ec3m tra ch\u00ednh x\u00e1c c\u00e1c ren b\u00ean trong.<\/dd>\n
        B\u01b0\u1edbc ren \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c t\u00ednh to\u00e1n dung sai nh\u01b0 th\u1ebf n\u00e0o?<\/dt>\n
        B\u01b0\u1edbc r\u0103ng l\u1edbn h\u01a1n l\u00e0m t\u0103ng d\u1ea3i dung sai, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n; b\u01b0\u1edbc r\u0103ng nh\u1ecf h\u01a1n cho ph\u00e9p dung sai ch\u1eb7t ch\u1ebd h\u01a1n \u0111\u1ec3 l\u1eafp r\u00e1p ch\u00ednh x\u00e1c.<\/dd>\n<\/dl>\n<\/section>\n

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

        Introduction This article provides a comprehensive overview of metric thread major diameter tolerances, focusing on internal threads as per ISO 965 standards. It serves as an essential reference for engineers and manufacturers, detailing tolerance values and calculation methods to ensure compatibility and performance in mechanical assemblies. The content is derived from established industry standards, offering […]<\/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-5783","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\/5783","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=5783"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5783\/revisions"}],"predecessor-version":[{"id":5785,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5783\/revisions\/5785"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5783"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}