{"id":5582,"date":"2025-12-22T08:33:37","date_gmt":"2025-12-22T08:33:37","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5582"},"modified":"2025-12-22T08:34:32","modified_gmt":"2025-12-22T08:34:32","slug":"gb-t-3103-3-2020-flat-washer-tolerances-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-3103-3-2020-flat-washer-tolerances-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn dung sai v\u00f2ng \u0111\u1ec7m ph\u1eb3ng GB\/T 3103.3-2020"},"content":{"rendered":"

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H\u01b0\u1edbng d\u1eabn dung sai v\u00f2ng \u0111\u1ec7m ph\u1eb3ng GB\/T 3103.3-2020<\/h1>\n
Dung sai cho v\u00f2ng \u0111\u1ec7m ph\u1eb3ng<\/div>\n

<\/p>\n

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

V\u00f2ng \u0111\u1ec7m ph\u1eb3ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng bu\u1ed9c ch\u1eb7t b\u1eb1ng c\u00e1ch ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng, ng\u0103n ng\u1eeba h\u01b0 h\u1ea1i b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u1ee5m l\u1eafp r\u00e1p. Ti\u00eau chu\u1ea9n GB\/T 3103.3-2020 quy \u0111\u1ecbnh dung sai cho v\u00f2ng \u0111\u1ec7m ph\u1eb3ng tr\u01a1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a t\u1eeb 1 mm \u0111\u1ebfn 150 mm, \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m A, C v\u00e0 F. Ti\u00eau chu\u1ea9n n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c trong c\u00e1c ng\u00e0nh k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed, \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 x\u00e2y d\u1ef1ng.<\/p>\n

\u0110\u01b0\u1ee3c bi\u00ean so\u1ea1n d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n ISO 4759-3:2016, ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c th\u00f4ng l\u1ec7 qu\u1ed1c t\u1ebf, th\u00fac \u0111\u1ea9y ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng thay th\u1ebf l\u1eabn nhau. H\u01b0\u1edbng d\u1eabn n\u00e0y n\u00eau chi ti\u1ebft c\u00e1c dung sai cho l\u1ed7 trong, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i, \u0111\u1ed9 d\u00e0y, v\u00e1t c\u1ea1nh v\u00e0 c\u00e1c thu\u1ed9c t\u00ednh h\u00ecnh d\u1ea1ng\/v\u1ecb tr\u00ed, h\u1ed7 tr\u1ee3 c\u00e1c k\u1ef9 s\u01b0 trong thi\u1ebft k\u1ebf v\u00e0 mua s\u1eafm.<\/p>\n<\/div>\n

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2. T\u1ed5ng quan v\u1ec1 ti\u00eau chu\u1ea9n GB\/T 3103.3-2020<\/h2>\n

\u0110\u01b0\u1ee3c C\u1ee5c Ti\u00eau chu\u1ea9n h\u00f3a Trung Qu\u1ed1c ban h\u00e0nh n\u0103m 2020, ti\u00eau chu\u1ea9n n\u00e0y c\u1eadp nh\u1eadt c\u00e1c phi\u00ean b\u1ea3n tr\u01b0\u1edbc \u0111\u00f3 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nh\u1eefng ti\u1ebfn b\u1ed9 to\u00e0n c\u1ea7u trong c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i v\u00f2ng \u0111\u1ec7m th\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 \u0111ai \u1ed1c, kh\u00f4ng bao g\u1ed3m c\u00e1c lo\u1ea1i \u0111\u1eb7c bi\u1ec7t nh\u01b0 v\u00f2ng \u0111\u1ec7m kh\u00f3a.<\/p>\n

N\u1ed9i dung ch\u00ednh bao g\u1ed3m dung sai k\u00edch th\u01b0\u1edbc tr\u01b0\u1edbc khi x\u1eed l\u00fd b\u1ec1 m\u1eb7t, v\u1edbi c\u00e1c quy \u0111\u1ecbnh cho ph\u00e9p sai l\u1ec7ch ch\u1ec9 khi c\u00f3 l\u00fd do k\u1ef9 thu\u1eadt ch\u00ednh \u0111\u00e1ng. Dung sai h\u00ecnh d\u1ea1ng v\u00e0 v\u1ecb tr\u00ed tu\u00e2n theo ti\u00eau chu\u1ea9n GB\/T 1182 v\u00e0 GB\/T 16671.<\/p>\n<\/div>\n

<\/p>\n

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3. Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 dung sai c\u1ee7a v\u00f2ng \u0111\u1ec7m ph\u1eb3ng<\/h2>\n

Dung sai \u0111\u1ea3m b\u1ea3o c\u00e1c v\u00f2ng \u0111\u1ec7m kh\u1edbp ch\u00ednh x\u00e1c trong c\u00e1c c\u1ee5m l\u1eafp r\u00e1p, ng\u0103n ng\u1eeba h\u1ecfng h\u00f3c do l\u1ec7ch tr\u1ee5c ho\u1eb7c \u0111\u1ed9 r\u01a1 qu\u00e1 m\u1ee9c. Ch\u00fang \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh cho c\u00e1c c\u1ea5p s\u1ea3n ph\u1ea9m: A (ch\u00ednh x\u00e1c), C (th\u00f4ng d\u1ee5ng) v\u00e0 F (tinh x\u1ea3o). Tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c, dung sai \u00e1p d\u1ee5ng cho qu\u00e1 tr\u00ecnh x\u1eed l\u00fd s\u01a1 b\u1ed9.<\/p>\n

C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh bao g\u1ed3m \u0111\u01b0\u1eddng k\u00ednh trong (d)1<\/sub>), \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (d)2<\/sub>), \u0111\u1ed9 d\u00e0y (t), v\u00e1t c\u1ea1nh (c)1<\/sub>, c2<\/sub>), v\u00e0 c\u00e1c dung sai v\u1ec1 h\u00ecnh d\u1ea1ng nh\u01b0 \u0111\u1ed9 \u0111\u1ed3ng tr\u1ee5c v\u00e0 \u0111\u1ed9 ph\u1eb3ng.<\/p>\n<\/div>\n

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4. Th\u00f4ng s\u1ed1 dung sai chi ti\u1ebft<\/h2>\n
4.1 L\u1ed7 b\u00ean trong d1<\/sub><\/div>\n

 <\/p>\n

Dung sai cho l\u1ed7 b\u00ean trong d1<\/sub> T\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u00e0y v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y<\/th>\nDung sai<\/th>\n<\/tr>\n
C\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		d1<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n		t1<\/sub>
\nph\u00fat<\/td>\n		e1<\/sub>
\nt\u1ed1i \u0111a<\/td>\n		d1<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n		t1<\/sub>
\nph\u00fat<\/td>\n		e1<\/sub>
\nt\u1ed1i \u0111a<\/td>\n		d1<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n<\/tr>\n
H12<\/td>\n0,5 t\u1ea5n<\/td>\n0,10 t\u1ea5n<\/td>\nH13<\/td>\n0,3 t\u1ea5n<\/td>\n0,15 t\u1ea5n<\/td>\nH14<\/td>\n<\/tr>\n
H12<\/td>\n0,3 t\u1ea5n<\/td>\n0,15 t\u1ea5n<\/td>\nH13<\/td>\n0,25 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\nH14<\/td>\n<\/tr>\n
H13<\/td>\n0,2 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\nH14<\/td>\n0,2 t\u1ea5n<\/td>\n0,25 t\u1ea5n<\/td>\nH15<\/td>\n<\/tr>\n
Burring kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0ng \u0111\u01b0\u1ee3c ph\u00e9p.<\/td>\nD\u1ea3i x\u00e9 (e)1<\/sub>), t1<\/sub> v\u00e0 vi\u1ec7c ch\u00f4n c\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0ng \u0111\u01b0\u1ee3c cho ph\u00e9p.<\/td>\n<\/tr>\n
t1<\/sub> l\u00e0 ph\u1ea7n l\u1ed7 n\u1eb1m trong ph\u1ea1m vi dung sai quy \u0111\u1ecbnh l\u00e0 d1<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.2 \u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i d2<\/sub><\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y<\/th>\nDung sai<\/th>\n<\/tr>\n
C\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t < 2
\n2 \u2264 t < 4
\nt \u2265 4<\/td>\n		d2<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n		e2<\/sub>
\nt\u1ed1i \u0111a<\/td>\n		d2<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n		e2<\/sub>
\nt\u1ed1i \u0111a<\/td>\n		d2<\/sub>
\nS\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/td>\n<\/tr>\n
h13<\/td>\n0,13 t<\/td>\nh14<\/td>\n0,18 t\u1ea5n<\/td>\nh16<\/td>\n<\/tr>\n
h13<\/td>\n0,15 t\u1ea5n<\/td>\nh14<\/td>\n0,20 t\u1ea5n<\/td>\nh16<\/td>\n<\/tr>\n
h14<\/td>\n0,18 t\u1ea5n<\/td>\nh15<\/td>\n0,25 t\u1ea5n<\/td>\nh16<\/td>\n<\/tr>\n
Burring v\u00e0 t2<\/sub> kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0ng \u0111\u01b0\u1ee3c cho ph\u00e9p<\/td>\nD\u1ea3i x\u00e9 (e)2<\/sub>), t2<\/sub> v\u00e0 vi\u1ec7c ch\u00f4n c\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0ng \u0111\u01b0\u1ee3c cho ph\u00e9p.<\/td>\n<\/tr>\n
t2<\/sub> l\u00e0 ph\u1ea7n \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i n\u1eb1m trong ph\u1ea1m vi dung sai quy \u0111\u1ecbnh c\u1ee7a d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.3 \u0110\u1ed9 d\u00e0y t<\/div>\n

Dung sai \u0111\u1ed9 d\u00e0y \u0111\u01b0\u1ee3c \u0111o sau khi lo\u1ea1i b\u1ecf bavia.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y t<\/th>\nC\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n\u00b10,04<\/td>\n\u00b10,05<\/td>\n\u00b10,10<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n\u00b10,06<\/td>\n\u00b10,10<\/td>\n\u00b10,20<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n\u00b10,12<\/td>\n\u00b10,20<\/td>\n\u00b10,30<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n\u00b10,16<\/td>\n\u00b10,30<\/td>\n\u00b10,60<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n\u00b10,20<\/td>\n\u00b10,60<\/td>\n\u00b11,00<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n\u00b10,24<\/td>\n\u00b11,00<\/td>\n\u00b11,20<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n\u00b10,28<\/td>\n\u00b11,20<\/td>\n\u00b11,60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.4 V\u00e1t c\u1ea1nh<\/div>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y danh ngh\u0129a<\/th>\nC\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n
c1<\/sub>
\nph\u00fat<\/th>\n		c2<\/sub>
\nph\u00fat<\/th>\n		c1<\/sub>
\nph\u00fat<\/th>\n		c2<\/sub>
\nph\u00fat<\/th>\n		c1<\/sub>
\nph\u00fat<\/th>\n		c2<\/sub>
\nph\u00fat<\/th>\n<\/tr>\n<\/thead>\n
1 \u2264 t < 2<\/td>\n0,20 t\u1ea5n<\/td>\n0,25 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\n0,25 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\n0,25 t\u1ea5n<\/td>\n<\/tr>\n
2 \u2264 t < 4<\/td>\n0,18 t\u1ea5n<\/td>\n0,22 t\u1ea5n<\/td>\n0,18 t\u1ea5n<\/td>\n0,22 t\u1ea5n<\/td>\n0,18 t\u1ea5n<\/td>\n0,22 t\u1ea5n<\/td>\n<\/tr>\n
t \u2265 4<\/td>\n0,15 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\n0,15 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\n0,15 t\u1ea5n<\/td>\n0,20 t\u1ea5n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.4.3 C\u00e1c y\u00eau c\u1ea7u b\u1ed5 sung \u0111\u1ed1i v\u1edbi m\u00e1y gi\u1eb7t k\u1ebft h\u1ee3p<\/div>\n

Theo y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi mua, v\u1ecb tr\u00ed v\u00e1t c\u1ea1nh so v\u1edbi c\u00e1c sai l\u1ec7ch do d\u1eadp khu\u00f4n c\u1ea7n \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong \u0111\u01a1n \u0111\u1eb7t h\u00e0ng.<\/p>\n

4.5 Dung sai v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 v\u1ecb tr\u00ed<\/div>\n

\u0394t \u00e1p d\u1ee5ng b\u00ean ngo\u00e0i x = 0,1 (d)2<\/sub> \u2013 d1<\/sub>), t\u1ee9c l\u00e0, chi\u1ec1u r\u1ed9ng v\u00f2ng l\u00e0 60%.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y t<\/th>\nC\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n
\u0394t
\nt\u1ed1i \u0111a<\/th>\n		\u0394t
\nt\u1ed1i \u0111a<\/th>\n		<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n0.02<\/td>\n0.025<\/td>\nKh\u00f4ng c\u00f3 y\u00eau c\u1ea7u<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n0.03<\/td>\n0.05<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n0.06<\/td>\n0.1<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n0.08<\/td>\n0.15<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n0.1<\/td>\n0.2<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n0.12<\/td>\n0.3<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n0.14<\/td>\n0.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.5.2 \u0110\u1ed3ng tr\u1ee5c y<\/div>\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y t<\/th>\nC\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n
y
\nt\u1ed1i \u0111a<\/th>\n		y
\nt\u1ed1i \u0111a<\/th>\n		y
\nt\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n
t < 2<\/td>\n2 IT11<\/td>\n2 IT12<\/td>\n2 IT13<\/td>\n<\/tr>\n
2 \u2264 t \u2264 4<\/td>\n2 IT12<\/td>\n2 IT13<\/td>\n2 IT14<\/td>\n<\/tr>\n
t \u2265 4<\/td>\n2 IT13<\/td>\n2 IT14<\/td>\n2 IT15<\/td>\n<\/tr>\n
Sai s\u1ed1 y d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng k\u00ednh d2<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
4.5.3 \u0110\u1ed9 ph\u1eb3ng (\u0110\u1ed9 l\u1ec7ch) z<\/div>\n

\u0110\u1ed9 ph\u1eb3ng z l\u00e0 hi\u1ec7u s\u1ed1 gi\u1eefa chi\u1ec1u cao hi\u1ec7u d\u1ee5ng hhi\u1ec7u qu\u1ea3<\/sub> v\u00e0 \u0111\u1ed9 d\u00e0y hi\u1ec7u d\u1ee5ng thi\u1ec7u qu\u1ea3<\/sub>L\u01b0u \u00fd: Kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o dung sai \u0111\u1ed9 d\u00e0y; c\u00e1c quy tr\u00ecnh b\u1ed5 sung nh\u01b0 m\u00e0i c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 l\u1ec7ch. \u0110o sau khi lo\u1ea1i b\u1ecf bavia.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ed9 d\u00e0y t<\/th>\nC\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m<\/th>\n<\/tr>\n
F<\/th>\nM\u1ed8T<\/th>\nC<\/th>\n<\/tr>\n
z
\nt\u1ed1i \u0111a<\/th>\n		z
\nt\u1ed1i \u0111a<\/th>\n		z
\nt\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n
t \u2264 0,5<\/td>\n0.07<\/td>\n0.1<\/td>\n0.13<\/td>\n<\/tr>\n
0,5 < t \u2264 1<\/td>\n0.1<\/td>\n0.15<\/td>\n0.2<\/td>\n<\/tr>\n
1 < t \u2264 2,5<\/td>\n0.2<\/td>\n0.2<\/td>\n0.25<\/td>\n<\/tr>\n
2,5 < t \u2264 4<\/td>\n0.3<\/td>\n0.3<\/td>\n0.3<\/td>\n<\/tr>\n
4 < t \u2264 6<\/td>\n0.4<\/td>\n0.4<\/td>\n0.4<\/td>\n<\/tr>\n
6 < t \u2264 10<\/td>\n0.6<\/td>\n0.6<\/td>\n0.6<\/td>\n<\/tr>\n
10 < t \u2264 20<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

\n

5. C\u00e1c y\u00eau c\u1ea7u ch\u00ednh trong GB\/T 3103.3-2020<\/h2>\n

Ph\u1ea3i ki\u1ec3m tra dung sai tr\u01b0\u1edbc khi x\u1eed l\u00fd b\u1ec1 m\u1eb7t. Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m s\u1ebd \u0111\u01b0\u1ee3c \u01b0u ti\u00ean n\u1ebfu c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t. C\u00e1c ph\u00e9p \u0111o \u0111\u1ed9 d\u00e0y v\u00e0 \u0111\u1ed9 ph\u1eb3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau khi lo\u1ea1i b\u1ecf bavia \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<\/div>\n

<\/p>\n

\n

6. Ph\u00e2n t\u00edch \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 sai s\u1ed1<\/h2>\n

C\u00e1c l\u1ed7i c\u00f3 th\u1ec3 ph\u00e1t sinh t\u1eeb c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t nh\u01b0 d\u1eadp khu\u00f4n, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng g\u1edd ho\u1eb7c c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 \u0111\u1ed3ng tr\u1ee5c. C\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c v\u00e0 x\u1eed l\u00fd sau gia c\u00f4ng. C\u00e1c l\u1ed7i th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m b\u1ecf qua th\u00f4ng s\u1ed1 v\u00e1t c\u1ea1nh; kh\u1eafc ph\u1ee5c b\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c b\u1ea3ng th\u00f4ng s\u1ed1 c\u1ee5 th\u1ec3 cho t\u1eebng lo\u1ea1i v\u1eadt li\u1ec7u.<\/p>\n<\/div>\n

<\/p>\n

\n

7. T\u00e1c \u0111\u1ed9ng c\u1ee7a ti\u00eau chu\u1ea9n GB\/T 3103.3-2020 \u0111\u1ed1i v\u1edbi ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h2>\n

Ti\u00eau chu\u1ea9n n\u00e0y th\u00fac \u0111\u1ea9y nghi\u00ean c\u1ee9u v\u1eadt li\u1ec7u b\u1eb1ng c\u00e1ch chu\u1ea9n h\u00f3a dung sai, h\u1ed7 tr\u1ee3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng trong s\u1ea3n xu\u1ea5t v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao nh\u01b0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, n\u01a1i c\u00e1c v\u00f2ng \u0111\u1ec7m lo\u1ea1i A \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady.<\/p>\n<\/div>\n

<\/p>\n

\n

8. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n
\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m c\u1ea5p A, C v\u00e0 F l\u00e0 g\u00ec?<\/h3>\n

C\u1ea5p \u0111\u1ed9 A cung c\u1ea5p dung sai ch\u1eb7t ch\u1ebd nh\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, c\u1ea5p \u0111\u1ed9 C cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng chung v\u00e0 c\u1ea5p \u0111\u1ed9 F cho dung sai nh\u1ecf trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3, nh\u01b0 \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y chi ti\u1ebft trong c\u00e1c b\u1ea3ng.<\/p>\n<\/div>\n

\n

Khi n\u00e0o th\u00ec n\u00ean \u0111o dung sai?<\/h3>\n

C\u00e1c dung sai \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u01b0\u1edbc khi x\u1eed l\u00fd b\u1ec1 m\u1eb7t, \u0111\u1ed9 d\u00e0y v\u00e0 \u0111\u1ed9 ph\u1eb3ng \u0111\u01b0\u1ee3c \u0111o sau khi lo\u1ea1i b\u1ecf bavia \u0111\u1ec3 tr\u00e1nh sai s\u00f3t do c\u00e1c l\u1ed7i trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<\/div>\n

\n

Ti\u00eau chu\u1ea9n n\u00e0y so s\u00e1nh nh\u01b0 th\u1ebf n\u00e0o v\u1edbi ti\u00eau chu\u1ea9n ISO 4759-3?<\/h3>\n

Ti\u00eau chu\u1ea9n GB\/T 3103.3-2020 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ti\u00eau chu\u1ea9n ISO 4759-3:2016, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch to\u00e0n c\u1ea7u v\u1ec1 dung sai \u0111\u1ed1i v\u1edbi v\u00f2ng \u0111\u1ec7m ph\u1eb3ng.<\/p>\n<\/div>\n

\n

N\u1ebfu ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m kh\u00e1c v\u1edbi \u0111i\u1ec1u n\u00e0y th\u00ec sao?<\/h3>\n

C\u00e1c ti\u00eau chu\u1ea9n d\u00e0nh ri\u00eang cho t\u1eebng s\u1ea3n ph\u1ea9m s\u1ebd \u0111\u01b0\u1ee3c \u01b0u ti\u00ean, nh\u01b0ng c\u00e1c tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7 c\u1ea7n ph\u1ea3i c\u00f3 l\u00fd do k\u1ef9 thu\u1eadt ch\u00ednh \u0111\u00e1ng.<\/p>\n<\/div>\n

\n

Vi\u1ec7c v\u00e1t c\u1ea1nh c\u00f3 b\u1eaft bu\u1ed9c kh\u00f4ng?<\/h3>\n

C\u00e1c g\u00f3c v\u00e1t t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh \u0111\u1ec3 tr\u00e1nh c\u00e1c c\u1ea1nh s\u1eafc nh\u1ecdn, v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb d\u1ef1a tr\u00ean \u0111\u1ed9 d\u00e0y v\u00e0 c\u1ea5p \u0111\u1ed9; \u0111\u1ed1i v\u1edbi c\u00e1c v\u00f2ng \u0111\u1ec7m k\u1ebft h\u1ee3p, v\u1ecb tr\u00ed c\u00f3 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/p>\n<\/div>\n

\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn c\u1ea5p h\u1ecdc ph\u00f9 h\u1ee3p cho h\u1ed3 s\u01a1 \u1ee9ng tuy\u1ec3n?<\/h3>\n

Ch\u1ecdn d\u1ef1a tr\u00ean \u0111\u1ed9 ch\u00ednh x\u00e1c l\u1eafp r\u00e1p: A d\u00e0nh cho c\u00e1c b\u1ed9 ph\u1eadn ch\u1ecbu t\u1ea3i tr\u1ecdng cao, C d\u00e0nh cho vi\u1ec7c b\u1eaft v\u00edt ti\u00eau chu\u1ea9n, c\u00f3 t\u00ednh \u0111\u1ebfn c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 \u0111\u1ed9 rung v\u00e0 ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng.<\/p>\n<\/div>\n<\/div>\n

<\/div>\n

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

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\n\t\t[\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":"

GB\/T 3103.3-2020 Flat Washer Tolerances Guide Tolerances for Flat Washers 1. Introduction Flat washers play a critical role in fastening systems by distributing loads, preventing surface damage, and ensuring assembly integrity. The GB\/T 3103.3-2020 standard specifies tolerances for plain flat washers with nominal diameters from 1 mm to 150 mm, applicable to product grades A, […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"

\r\n\r\n\r\n

GB\/T 3103.3-2020 Flat Washer Tolerances Guide<\/h1>\r\n
Tolerances for Flat Washers<\/div>\r\n\r\n
\r\n

1. Introduction<\/h2>\r\nFlat washers play a critical role in fastening systems by distributing loads, preventing surface damage, and ensuring assembly integrity. The GB\/T 3103.3-2020 standard specifies tolerances for plain flat washers with nominal diameters from 1 mm to 150 mm, applicable to product grades A, C, and F. This standard is essential for maintaining precision in mechanical engineering, automotive, aerospace, and construction industries.\r\n\r\nAdopted from ISO 4759-3:2016, it ensures compatibility with international practices, promoting quality control and interchangeability. This guide details tolerances for inner hole, outer diameter, thickness, chamfers, and form\/position attributes, aiding engineers in design and procurement.\r\n\r\n<\/div>\r\n\r\n
\r\n

2. GB\/T 3103.3-2020 Standard Overview<\/h2>\r\nReleased in 2020 by the Standardization Administration of China, this standard updates previous versions to align with global advancements in fastener technology. It applies to plain washers used with bolts, screws, and nuts, excluding special types like lock washers.\r\n\r\nKey content includes dimensional tolerances before surface treatment, with provisions for deviations only when technically justified. Shape and position tolerances follow GB\/T 1182 and GB\/T 16671.\r\n\r\n<\/div>\r\n\r\n
\r\n

3. Basic Principles of Flat Washer Tolerances<\/h2>\r\nTolerances ensure washers fit precisely in assemblies, preventing failures due to misalignment or excessive play. They are defined for product grades: A (precision), C (general), and F (fine). Unless specified otherwise, tolerances apply pre-treatment.\r\n\r\nKey parameters include inner diameter (d1<\/sub>), outer diameter (d2<\/sub>), thickness (t), chamfers (c1<\/sub>, c2<\/sub>), and form tolerances like coaxiality and flatness.\r\n\r\n<\/div>\r\n\r\n
\r\n

4. Detailed Tolerance Specifications<\/h2>\r\n
4.1 Inner Hole d1<\/sub><\/div>\r\n \r\n

Tolerances for inner hole d1<\/sub> vary by thickness and product grade.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness<\/th>\r\nTolerances<\/th>\r\n<\/tr>\r\n
Product Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2\r\n2 \u2264 t < 4\r\nt \u2265 4<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\nt1<\/sub>\r\nmin<\/td>\r\ne1<\/sub>\r\nmax<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\nt1<\/sub>\r\nmin<\/td>\r\ne1<\/sub>\r\nmax<\/td>\r\nd1<\/sub>\r\nTolerance<\/td>\r\n<\/tr>\r\n
H12<\/td>\r\n0.5 t<\/td>\r\n0.10 t<\/td>\r\nH13<\/td>\r\n0.3 t<\/td>\r\n0.15 t<\/td>\r\nH14<\/td>\r\n<\/tr>\r\n
H12<\/td>\r\n0.3 t<\/td>\r\n0.15 t<\/td>\r\nH13<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\nH14<\/td>\r\n<\/tr>\r\n
H13<\/td>\r\n0.2 t<\/td>\r\n0.20 t<\/td>\r\nH14<\/td>\r\n0.2 t<\/td>\r\n0.25 t<\/td>\r\nH15<\/td>\r\n<\/tr>\r\n
Burring not defined but permitted<\/td>\r\nTear band (e1<\/sub>), t1<\/sub> and burring not defined but permitted<\/td>\r\n<\/tr>\r\n
t1<\/sub> is the portion of the hole within the specified tolerance of d1<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.2 Outer Diameter d2<\/sub><\/div>\r\n \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness<\/th>\r\nTolerances<\/th>\r\n<\/tr>\r\n
Product Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2\r\n2 \u2264 t < 4\r\nt \u2265 4<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\ne2<\/sub>\r\nmax<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\ne2<\/sub>\r\nmax<\/td>\r\nd2<\/sub>\r\nTolerance<\/td>\r\n<\/tr>\r\n
h13<\/td>\r\n0.13 t<\/td>\r\nh14<\/td>\r\n0.18 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
h13<\/td>\r\n0.15 t<\/td>\r\nh14<\/td>\r\n0.20 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
h14<\/td>\r\n0.18 t<\/td>\r\nh15<\/td>\r\n0.25 t<\/td>\r\nh16<\/td>\r\n<\/tr>\r\n
Burring and t2<\/sub> not defined but permitted<\/td>\r\nTear band (e2<\/sub>), t2<\/sub> and burring not defined but permitted<\/td>\r\n<\/tr>\r\n
t2<\/sub> is the portion of the outer diameter within the specified tolerance of d2<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.3 Thickness t<\/div>\r\n

Thickness tolerances measured after deburring.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n\u00b10.04<\/td>\r\n\u00b10.05<\/td>\r\n\u00b10.10<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n\u00b10.06<\/td>\r\n\u00b10.10<\/td>\r\n\u00b10.20<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n\u00b10.12<\/td>\r\n\u00b10.20<\/td>\r\n\u00b10.30<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n\u00b10.16<\/td>\r\n\u00b10.30<\/td>\r\n\u00b10.60<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n\u00b10.20<\/td>\r\n\u00b10.60<\/td>\r\n\u00b11.00<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n\u00b10.24<\/td>\r\n\u00b11.00<\/td>\r\n\u00b11.20<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n\u00b10.28<\/td>\r\n\u00b11.20<\/td>\r\n\u00b11.60<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.4 Chamfers<\/div>\r\n \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Nominal Thickness<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
c1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\nc1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\nc1<\/sub>\r\nmin<\/th>\r\nc2<\/sub>\r\nmin<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
1 \u2264 t < 2<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n0.20 t<\/td>\r\n0.25 t<\/td>\r\n<\/tr>\r\n
2 \u2264 t < 4<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n0.18 t<\/td>\r\n0.22 t<\/td>\r\n<\/tr>\r\n
t \u2265 4<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n0.15 t<\/td>\r\n0.20 t<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.4.3 Combined Washers Supplementary Requirements<\/div>\r\nUpon buyer request, chamfer position relative to stamping deviations should be specified in the order.\r\n
4.5 Form and Position Tolerances<\/div>\r\n

\u0394t applies outside x = 0.1 (d2<\/sub> - d1<\/sub>), i.e., 60% of ring width.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
\u0394t\r\nmax<\/th>\r\n\u0394t\r\nmax<\/th>\r\n<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n0.02<\/td>\r\n0.025<\/td>\r\nNo requirement<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n0.03<\/td>\r\n0.05<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n0.06<\/td>\r\n0.1<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n0.08<\/td>\r\n0.15<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n0.1<\/td>\r\n0.2<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n0.12<\/td>\r\n0.3<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n0.14<\/td>\r\n0.4<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.5.2 Coaxiality y<\/div>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
y\r\nmax<\/th>\r\ny\r\nmax<\/th>\r\ny\r\nmax<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t < 2<\/td>\r\n2 IT11<\/td>\r\n2 IT12<\/td>\r\n2 IT13<\/td>\r\n<\/tr>\r\n
2 \u2264 t \u2264 4<\/td>\r\n2 IT12<\/td>\r\n2 IT13<\/td>\r\n2 IT14<\/td>\r\n<\/tr>\r\n
t \u2265 4<\/td>\r\n2 IT13<\/td>\r\n2 IT14<\/td>\r\n2 IT15<\/td>\r\n<\/tr>\r\n
Tolerance y based on diameter d2<\/sub><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
4.5.3 Flatness (Deflection) z<\/div>\r\n

Flatness z is the difference between effective height heff<\/sub> and effective thickness teff<\/sub>. Note: Independent of thickness tolerance; additional processes like grinding may reduce deflection. Measured after deburring.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Thickness t<\/th>\r\nProduct Grade<\/th>\r\n<\/tr>\r\n
F<\/th>\r\nA<\/th>\r\nC<\/th>\r\n<\/tr>\r\n
z\r\nmax<\/th>\r\nz\r\nmax<\/th>\r\nz\r\nmax<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
t \u2264 0.5<\/td>\r\n0.07<\/td>\r\n0.1<\/td>\r\n0.13<\/td>\r\n<\/tr>\r\n
0.5 < t \u2264 1<\/td>\r\n0.1<\/td>\r\n0.15<\/td>\r\n0.2<\/td>\r\n<\/tr>\r\n
1 < t \u2264 2.5<\/td>\r\n0.2<\/td>\r\n0.2<\/td>\r\n0.25<\/td>\r\n<\/tr>\r\n
2.5 < t \u2264 4<\/td>\r\n0.3<\/td>\r\n0.3<\/td>\r\n0.3<\/td>\r\n<\/tr>\r\n
4 < t \u2264 6<\/td>\r\n0.4<\/td>\r\n0.4<\/td>\r\n0.4<\/td>\r\n<\/tr>\r\n
6 < t \u2264 10<\/td>\r\n0.6<\/td>\r\n0.6<\/td>\r\n0.6<\/td>\r\n<\/tr>\r\n
10 < t \u2264 20<\/td>\r\n1<\/td>\r\n1<\/td>\r\n1<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n
\r\n

5. Key Requirements in GB\/T 3103.3-2020<\/h2>\r\nTolerances must be verified pre-surface treatment. Product standards take precedence if differing. Measurements for thickness and flatness occur post-deburring to ensure accuracy.\r\n\r\n<\/div>\r\n\r\n
\r\n

6. Precision and Error Analysis<\/h2>\r\nErrors may arise from manufacturing processes like stamping, leading to burring or coaxiality issues. Improve accuracy via precise tooling and post-processing. Common errors include ignoring chamfer specs; resolve by adhering to grade-specific tables.\r\n\r\n<\/div>\r\n\r\n
\r\n

7. Impact of GB\/T 3103.3-2020 on Industry<\/h2>\r\nThis standard enhances material research by standardizing tolerances, aids quality control in manufacturing, and supports applications in high-precision sectors like aerospace, where grade A washers ensure reliability.\r\n\r\n<\/div>\r\n\r\n
\r\n

8. Frequently Asked Questions (FAQ)<\/h2>\r\n
\r\n

What is the difference between product grades A, C, and F?<\/h3>\r\nGrade A offers the tightest tolerances for precision applications, C for general use, and F for fine tolerances in specific scenarios, as detailed in the tables.\r\n\r\n<\/div>\r\n
\r\n

When should tolerances be measured?<\/h3>\r\nTolerances apply before surface treatment, with thickness and flatness measured after deburring to avoid inaccuracies from manufacturing artifacts.\r\n\r\n<\/div>\r\n
\r\n

How does this standard compare to ISO 4759-3?<\/h3>\r\nGB\/T 3103.3-2020 is equivalent to ISO 4759-3:2016, ensuring global compatibility for tolerances on flat washers.\r\n\r\n<\/div>\r\n
\r\n

What if product standards differ from this?<\/h3>\r\nProduct-specific standards take precedence, but deviations require technical justification.\r\n\r\n<\/div>\r\n
\r\n

Are chamfers mandatory?<\/h3>\r\nMinimum chamfers are specified to prevent sharp edges, with values based on thickness and grade; for combined washers, position may need specification.\r\n\r\n<\/div>\r\n
\r\n

How to select the appropriate grade for an application?<\/h3>\r\nChoose based on assembly precision: A for high-load critical parts, C for standard bolting, considering factors like vibration and load distribution.\r\n\r\n<\/div>\r\n<\/div>\r\n
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