{"id":4460,"date":"2025-06-12T10:15:17","date_gmt":"2025-06-12T01:15:17","guid":{"rendered":"https:\/\/ohtavn.com\/?post_type=media&p=4460"},"modified":"2025-06-17T11:47:41","modified_gmt":"2025-06-17T02:47:41","slug":"prevents-over-tightning-what-is-the-proper-fastening-torque-for-screws","status":"publish","type":"media","link":"https:\/\/ohtavn.com\/vi\/media\/prevents-over-tightning-what-is-the-proper-fastening-torque-for-screws\/","title":{"rendered":"Ng\u0103n ch\u1eb7n vi\u1ec7c “si\u1ebft qu\u00e1 ch\u1eb7t”! M\u00f4-men si\u1ebft ph\u00f9 h\u1ee3p cho \u1ed1c v\u00edt l\u00e0 bao nhi\u00eau?"},"content":{"rendered":"
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Gi\u1edbi thi\u1ec7u<\/h3>\n<\/div>\n
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B\u1ea1n c\u00f3 ngh\u0129 r\u1eb1ng n\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t con \u1ed1c v\u00edt kh\u00f4ng? Tr\u00ean th\u1ef1c t\u1ebf, trong th\u1ebf gi\u1edbi s\u1ea3n xu\u1ea5t, c\u00e1ch si\u1ebft ch\u1eb7t b\u1ed9 ph\u1eadn nh\u1ecf n\u00e0y \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a s\u1ea3n ph\u1ea9m. Qu\u1ea3n l\u00fd m\u00f4-men xo\u1eafn \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111\u00f3 l\u00e0 l\u1ef1c b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ec3 si\u1ebft ch\u1eb7t con \u1ed1c v\u00edt. <\/p>\n<\/div>\n

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N\u1ebfu b\u1ea1n si\u1ebft qu\u00e1 ch\u1eb7t, con \u1ed1c v\u00edt ho\u1eb7c b\u1ed9 ph\u1eadn \u0111\u00f3 c\u00f3 th\u1ec3 b\u1ecb g\u00e3y. M\u1eb7t kh\u00e1c, n\u1ebfu b\u1ea1n kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u1ee7 l\u1ef1c, n\u00f3 c\u00f3 th\u1ec3 b\u1ecb l\u1ecfng khi b\u1ea1n s\u1eed d\u1ee5ng, d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 ho\u1eb7c tai n\u1ea1n b\u1ea5t ng\u1edd. <\/p>\n<\/div>\n

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“V\u1eady t\u00f4i n\u00ean l\u00e0m g\u00ec?”<\/p>\n<\/div>\n

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B\u00e0i vi\u1ebft n\u00e0y tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi \u0111\u00f3. Ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch theo c\u00e1ch d\u1ec5 hi\u1ec3u v\u1ec1 “m\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t th\u00edch h\u1ee3p” \u0111\u1ec3 si\u1ebft ch\u1eb7t v\u00edt “v\u1eeba ph\u1ea3i”, t\u1eeb nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c t\u1ebf trong l\u0129nh v\u1ef1c n\u00e0y. \u0110\u00e2y l\u00e0 b\u00e0i vi\u1ebft b\u1eaft bu\u1ed9c ph\u1ea3i \u0111\u1ecdc \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai li\u00ean quan \u0111\u1ebfn v\u00edt, t\u1eeb c\u00e1c k\u1ef9 s\u01b0 trong l\u0129nh v\u1ef1c s\u1ea3n xu\u1ea5t \u0111\u1ebfn nh\u00e2n vi\u00ean ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 th\u1eadm ch\u00ed c\u1ea3 nh\u1eefng ng\u01b0\u1eddi th\u1ef1c s\u1ef1 l\u00e0m vi\u1ec7c v\u1edbi v\u00edt. Ch\u00fang ta h\u00e3y c\u00f9ng xem nh\u00e9! <\/p>\n<\/div>\n

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M\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t c\u1ee7a v\u00edt l\u00e0 g\u00ec? <\/h3>\n<\/div>\n
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Tr\u01b0\u1edbc ti\u00ean, ch\u00fang ta h\u00e3y n\u00f3i v\u1ec1 nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n, ch\u00ednh l\u00e0 m\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t. <\/p>\n<\/div>\n

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M\u00f4-men xo\u1eafn l\u00e0 “l\u1ef1c quay”, m\u1ee5c \u0111\u00edch l\u00e0 “l\u1ef1c gi\u1eef ch\u1eb7t”<\/h4>\n<\/div>\n
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M\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t<\/strong> l\u00e0 “l\u1ef1c quay<\/strong>” \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng b\u1eb1ng c\u1edd l\u00ea khi si\u1ebft ch\u1eb7t v\u00edt ho\u1eb7c bu l\u00f4ng. N\u00f3 l\u00e0 t\u00edch c\u1ee7a l\u1ef1c (N) v\u00e0 kho\u1ea3ng c\u00e1ch (m) t\u1eeb t\u00e2m quay, v\u00e0 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng \u0111\u01a1n v\u1ecb “N\u00b7m (Newton m\u00e9t)”. <\/p>\n<\/div>\n

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V\u1eady t\u1ea1i sao ch\u00fang ta si\u1ebft ch\u1eb7t v\u00edt b\u1eb1ng c\u00e1ch xoay ch\u00fang? M\u1ee5c \u0111\u00edch l\u00e0 t\u1ea1o ra “l\u1ef1c d\u1ecdc” \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh ch\u1eb7t c\u00e1c b\u1ed9 ph\u1eadn v\u1edbi nhau. Khi si\u1ebft ch\u1eb7t m\u1ed9t con v\u00edt, b\u1ea3n th\u00e2n con v\u00edt s\u1ebd gi\u00e3n ra m\u1ed9t ch\u00fat. V\u00e0 l\u1ef1c khi\u1ebfn con v\u00edt b\u1ecb gi\u00e3n tr\u1edf l\u1ea1i h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u l\u00e0 l\u1ef1c d\u1ecdc. N\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t l\u00f2 xo v\u00f4 h\u00ecnh, m\u1ea1nh m\u1ebd \u00e9p ch\u1eb7t c\u00e1c b\u1ed9 ph\u1eadn l\u1ea1i v\u1edbi nhau. Nh\u1edd ma s\u00e1t do l\u1ef1c d\u1ecdc n\u00e0y g\u00e2y ra, c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh m\u00e0 kh\u00f4ng b\u1ecb tr\u01b0\u1ee3t ho\u1eb7c n\u1edbi l\u1ecfng. <\/p>\n<\/div>\n

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N\u00f3i c\u00e1ch kh\u00e1c, si\u1ebft ch\u1eb7t v\u1edbi m\u00f4-men xo\u1eafn th\u00edch h\u1ee3p = \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u1ef1c d\u1ecdc th\u00edch h\u1ee3p ch\u00ednh l\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a vi\u1ec7c si\u1ebft ch\u1eb7t v\u00edt. <\/p>\n<\/div>\n

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\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i l\u00e0m \u0111\u00fang! R\u1ee7i ro khi si\u1ebft qu\u00e1 ch\u1eb7t ho\u1eb7c qu\u00e1 l\u1ecfng<\/h4>\n<\/div>\n
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B\u1ea1n \u0111\u00e3 bao gi\u1edd ngh\u0129 r\u1eb1ng, “T\u00f4i ph\u1ea3i si\u1ebft ch\u1eb7t n\u00f3 \u0111\u00fang c\u00e1ch!” v\u00e0 cu\u1ed1i c\u00f9ng l\u1ea1i d\u00f9ng qu\u00e1 nhi\u1ec1u l\u1ef1c ch\u01b0a? Nh\u01b0ng \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t c\u00e1i b\u1eaby. Si\u1ebft qu\u00e1 ch\u1eb7t ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i, qu\u00e1 l\u1ecfng c\u00f3 th\u1ec3 g\u00e2y ra nhi\u1ec1u v\u1ea5n \u0111\u1ec1. <\/p>\n<\/div>\n

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V\u1eb7n qu\u00e1 ch\u1eb7t (qu\u00e1 m\u00f4-men xo\u1eafn) l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra “s\u1ef1 ph\u00e1 h\u1ee7y”<\/strong><\/p>\n<\/div>\n

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  • V\u00edt v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn s\u1ebd b\u1ecb g\u00e3y! :<\/strong>\u00a0V\u00edt c\u00f3 th\u1ec3 gi\u00e3n ra qu\u00e1 nhi\u1ec1u ho\u1eb7c g\u00e3y ra. N\u1ebfu b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i m\u1ec1m, gh\u1ebf c\u00f3 th\u1ec3 b\u1ecb l\u00fan ho\u1eb7c n\u1ee9t. <\/li>\n
  • Li\u1ec7u n\u00f3 c\u00f3 gi\u00fap n\u1edbi l\u1ecfng d\u1ec5 h\u01a1n kh\u00f4ng? :<\/strong>\u00a0N\u1ebfu c\u00e1c ren b\u1ecb h\u1ecfng do v\u1eb7n qu\u00e1 ch\u1eb7t, ma s\u00e1t c\u00f3 th\u1ec3 thay \u0111\u1ed5i v\u00e0 th\u1eadm ch\u00ed c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 n\u1edbi l\u1ecfng b\u1ea5t ng\u1edd. <\/li>\n<\/ul>\n<\/div>\n
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    M\u00f4-men xo\u1eafn th\u1ea5p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ecfng v\u00e0 r\u01a1i ra<\/strong><\/p>\n<\/div>\n

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    • B\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y n\u00f3 l\u1ecfng! :<\/strong>\u00a0Rung \u0111\u1ed9ng v\u00e0 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 khi\u1ebfn \u1ed1c v\u00edt l\u1ecfng tr\u01b0\u1edbc khi b\u1ea1n bi\u1ebft \u0111i\u1ec1u \u0111\u00f3. \u0110\u00e2y l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 r\u1ea5t ph\u1ed5 bi\u1ebfn. <\/li>\n
    • L\u1ecfng l\u1ebbo v\u00e0 tr\u1ee5c tr\u1eb7c:<\/strong>\u00a0C\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn, v\u00ec v\u1eady ch\u00fang c\u00f3 th\u1ec3 ph\u00e1t ra ti\u1ebfng \u0111\u1ed9ng l\u1ea1 ho\u1eb7c kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u01b0 mong \u0111\u1ee3i. <\/li>\n
    • Trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t, n\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t v\u1ee5 tai n\u1ea1n l\u1edbn:<\/strong> L\u1ed1p xe c\u00f3 th\u1ec3 b\u1ecb bung ra, m\u00e1y m\u00f3c c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng… M\u1ed9t con \u1ed1c v\u00edt l\u1ecfng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u00ecnh hu\u1ed1ng kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c. <\/li>\n<\/ul>\n<\/div>\n
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      V\u1eady th\u00ec sao? B\u1ea1n c\u00f3 hi\u1ec3u t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c qu\u1ea3n l\u00fd “l\u1ef1c xo\u1eafn v\u1eeba ph\u1ea3i” kh\u00f4ng? <\/p>\n<\/div>\n

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      V\u1eady, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh “l\u1ef1c xo\u1eafn v\u1eeba ph\u1ea3i”? <\/h3>\n<\/div>\n
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      Gi\u00e1 tr\u1ecb l\u1ef1c xo\u1eafn ph\u00f9 h\u1ee3p th\u1ef1c s\u1ef1 thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau. Gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00f4ng th\u1ee9c n\u1ea5u \u0103n, b\u1ea1n c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng t\u00f9y thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n v\u00e0 \u0111i\u1ec1u ki\u1ec7n. <\/p>\n<\/div>\n

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      \"\"<\/p>\n<\/div>\n

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      Nh\u1eefng y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn<\/h4>\n<\/div>\n
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      • \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a b\u1ea3n th\u00e2n v\u00edt:<\/strong> L\u1ef1c ch\u1ecbu \u0111\u1ef1ng v\u00e0 m\u00f4-men xo\u1eafn c\u1ea7n thi\u1ebft s\u1ebd thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u00e0y c\u1ee7a v\u00edt (\u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a), \u0111\u1ed9 m\u1ecbn c\u1ee7a ren (b\u01b0\u1edbc ren), v\u1eadt li\u1ec7u (s\u1eaft, th\u00e9p kh\u00f4ng g\u1ec9, v.v.) v\u00e0 \u0111\u1ed9 b\u1ec1n (ph\u00e2n lo\u1ea1i \u0111\u1ed9 b\u1ec1n). <\/li>\n
      • T\u00ecnh tr\u1ea1ng c\u1ee7a v\u1eadt kh\u00e1c (v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh):<\/strong> V\u1eadt li\u1ec7u (kim lo\u1ea1i, nh\u1ef1a, v.v.) v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u1eadt th\u1ec3 kh\u00e1c \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh c\u0169ng c\u00f3 t\u00e1c \u0111\u1ed9ng. C\u1ea7n c\u1ea9n th\u1eadn v\u1edbi c\u00e1c v\u1eadt li\u1ec7u m\u1ec1m. <\/li>\n
      • L\u01b0\u1ee3ng ma s\u00e1t:<\/strong> Ma s\u00e1t gi\u1eefa ren v\u00e0 \u0111\u1ebf (b\u1ec1 m\u1eb7t n\u01a1i \u0111\u1ea7u v\u00edt v\u00e0 \u0111ai \u1ed1c ti\u1ebfp x\u00fac) \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn hi\u1ec7u qu\u1ea3 chuy\u1ec3n \u0111\u1ed5i m\u00f4-men xo\u1eafn th\u00e0nh l\u1ef1c d\u1ecdc. \u0110\u00e2y l\u00e0 l\u00fac m\u1ecdi th\u1ee9 tr\u1edf n\u00ean kh\u00f3 kh\u0103n. <\/li>\n
      • C\u00f3 n\u00ean s\u1eed d\u1ee5ng ch\u1ea5t b\u00f4i tr\u01a1n kh\u00f4ng:<\/strong> Vi\u1ec7c b\u00f4i d\u1ea7u ho\u1eb7c m\u1ee1 s\u1ebd l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 ma s\u00e1t. Khi \u0111\u00f3, l\u1ef1c d\u1ecdc s\u1ebd cao h\u01a1n nhi\u1ec1u ngay c\u1ea3 khi c\u00f3 c\u00f9ng m\u00f4-men xo\u1eafn! <\/strong> N\u1ebfu b\u1ea1n kh\u00f4ng bi\u1ebft \u0111i\u1ec1u n\u00e0y v\u00e0 si\u1ebft ch\u1eb7t bu l\u00f4ng v\u1edbi c\u00f9ng m\u00f4-men xo\u1eafn nh\u01b0 khi kh\u00f4, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng si\u1ebft qu\u00e1 m\u1ee9c. N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng ch\u1ea5t b\u00f4i tr\u01a1n, b\u1ea1n ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn xu\u1ed1ng. <\/li>\n
      • L\u1ef1c d\u1ecdc tr\u1ee5c m\u1ee5c ti\u00eau:<\/strong> Tr\u01b0\u1edbc h\u1ebft, c\u1ea7n bao nhi\u00eau l\u1ef1c c\u1ed1 \u0111\u1ecbnh (l\u1ef1c d\u1ecdc tr\u1ee5c) t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111\u00f3? Gi\u00e1 tr\u1ecb m\u1ee5c ti\u00eau n\u00e0y, \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh \u1edf giai \u0111o\u1ea1n thi\u1ebft k\u1ebf, l\u00e0 m\u1ee5c ti\u00eau \u0111\u1ec3 thi\u1ebft l\u1eadp m\u00f4-men xo\u1eafn. \u200b\u200b<\/li>\n<\/ul>\n<\/div>\n
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        C\u00f4ng th\u1ee9c \u0111\u1ec3 c\u00f3 \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 v\u00e0 “h\u1ec7 s\u1ed1 m\u00f4 men xo\u1eafn”<\/h4>\n<\/div>\n
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        \u01af\u1edbc t\u00ednh s\u01a1 b\u1ed9 gi\u00e1 tr\u1ecb m\u00f4 men xo\u1eafn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng m\u1ed9t c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n. <\/p>\n<\/div>\n

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        T = k * d * F<\/strong><\/p>\n<\/div>\n

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