一般公差未标注公差的线性和角度尺寸的公差GB/T1804-2000线性尺寸的极限偏差数值基本尺寸段, mm公差等级0.5~3>3~6>6-30>30~120>120~400>400~1000>1000~2000>2000~4000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5_中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2±2粗糙c±0.2±0.3±0.5±0.8±1.2±2±3±4最精v±0.5_±1±1.5±2.5±4±6±8倒角半径和倒角高度尺寸的极限偏差数值公差等级基本尺寸段, mm0.5~3>3~6>6~30精密f>30~120±0.2±0.5中等m±1±2粗糙c±0.4±1最精v±2±4角度尺寸的极限偏差数值长度分段，mm公差等级~10>10 \sim 50>50 \sim 120>30~120>400精密f\pm 1^{\circ}\pm 30'\pm 20'\pm 10'中等m\pm 5'粗糙c\pm 1^{\circ}32'\pm 1^{\circ}\pm 30'\pm 15'\pm 10'最精v\pm 3^{\circ}\pm 2^{\circ}\pm 1^{\circ}\pm 30'\pm 20'

标准公差数值公差等级基本尺寸IT4IT5IT6IT7IT8IT9IT10IT11IT12(um)≤33461014254060100>3~64581218304875120>6~104691522365890150>10~18581118274370110180>18~30691321335284130210>30~5071116253962100160250>50~8081319304674120190300>80~120101522355487140220350>120~1801218254063100160250400>180~2501420294672115180290460>250~3151623325281130210320520>315~4001825365789140230360570>400~5002027406397155250400630>500~63022324470110170280440700>630~80025365080125200320500800>800~100029405690140230360560900>1000~12503347661051652604206601050>1250~16003955781251953105007801250>1600~20004665921502303706009201500>2000~2500557811017528044070011001750>2500~3150689613521033054086013502100>3150~400084115165260410660105016502600>4000~5000100140200320500800130020003200>5000~6300125170250400620980155025004000>6300~80001552153104907601200195031004900>8000~100001952703806009401500240038006000基孔制优先、常用配合轴基准defghjskmnp孔间隙配合过渡配合过盈配合H6H6/f5H6/g5H6/h5H6/js5H6/k5H6/m5H6/n5H6/p5H7H7/f6H7/g6H7/h6H7/js6H7/k6H7/m6H7/n6H7/p6H8/e7H8/f7H8/g7H8/h7H8/js7H8/k7H8/m7H8/n7H8/p7H8H8/d8H8/e8H8/f8H8/h8H9H9/d9H9/e9H9/f9H9/h9H10H10/d10H10/h10

1.线性尺寸的极限偏差数值（GB/T1804-2000）（mm）公差等级基本尺寸分段0.5~33~66~3030~120120~400400~10001000~2000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2粗糙e±0.2±0.3±0.5±0.8±1.2±2±3最粗v--±0.5±1±1.5±2.5±4±62.倒圆半径和倒角高度尺寸的极限偏差（GB/T1804-2000）mm 公差等级基本尺寸分段0.5~33~66~3030精密f±0.2±0.5±1±2中等m粗糙e±0.4±1±2±4最粗v3.角度尺寸的极限偏差数值（GB/T1804-2000）公差等级基本尺寸分段~1010~5050~120120~400400精密f±1°±30±20±10±5中等m粗糙e±1°30±1°±30±20±10最粗v±3°±2°±1°±30±204.未注形位公差按GB/T1184-K 4.1 直线度和平面度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围1010~3030~100100~300300~10001000~3000H0.030.050.10.20.30.4K0.050.10.20.40.60.8L0.10.20.40.81.21.64.2 垂直度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围100100~300300~10001000~3000H0.20.30.40.5K0.40.60.81L0.411.524.3 对称度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围100100~300300~10001000~3000H0.5K0.60.81L0.611.524.4 圆跳动的未注公

基本尺寸:mm大于至公差等级IT01IT0IT1IT2IT3IT4IT5IT6单位:mmIT7IT8IT9IT10IT11IT12IT13单位：IT14IT15IT16um03IT170.3IT180.50.81.2234单位:mm63106140.4250.6401601.50.12.50.1440.2550.4680.61210180.41301.40.6487511.50.122.50.180.3460.4890.7510151.218221.80.5360.8581.2900.1520.2230.36560.580.9111830181.52.2270.61431.5702.51100.1840.2760.4390.730131.121501.80.6332.75211.5841302.50.2140.3370.521.8411501.3162.125800.83.3391.262100231600.2550.3980.6213119801.62.5301204613.9741.51202.519040.360.460.7410151.21201.922351805431.24.68721403.522050.350.548120.87181.41802.2252503.54025.46310034.51607250100.40.6314201291.62502.54631542.5631156.34185629080.46120.72161.15231.85323152.9524004.68137.21305210793200.520.81131.3182.1254003.2365005.2574898.114062308360100.57150.89201.4272.3405003.6636305.7974.58.915562509400110.63160.97221.55302.5446307048006.351109.71757280104400.7131.75181.1252.835508004.410008075.512511820032011155000.8211.2529240563.21000590125081406.512.52309360560130.9181.424342.34612503.6665.6160010598165142601142015660211.05291.65402.6544.21600786.6200012510.519516.593101350018780251.25351.95483.16559220007.8250015012.523019.53701115226009201.530412.3573.777625001109.2

99+09+zs+Sb+68+EE+82+EZ+NDE+TE+2+EZ+ZZ+I+ST+ZI+sS+IS+Sb+8E+EE+82+bz+02+02+T+ST+ET+II+6+8++24+E9+SS+8b+Ib+DE+62+sz+W02+T+ST+ET+IT+6+8++9zs+9b+Ob+SE+08+sz+IZ+8T+02+T+ST+ET+II+6+8++sEb+E+EE+82+bz+02+I+ST+b+b+E+E+2+2+2+I+L 9S+05+Eb+8E+ZE+Z+EZ+6T+xb+E+E+E+z+z+z+I+998+EE+82+sz+TZ+ST+ST+ZT+b+b+E+E+z+2+z+I+s2+bZ+TZ+8T+ST+ET+II+6+OET-STT-00T-8-DL-29-ZS-Eb-6。 00。 18-24-89-bS-9b-6E-EE-Z-8。 4ZS-9b-0b-SE-08-SZ-12-8T-0。 000。 ZE-62-SZ-22-61-9T-ET-90000000。EZ-02-8T-St-ET--6-8-s00000。69-T9-DS-b-Ob-DE-82-忆一T-ST-bT-ZT-01-6-L-9-6b-比一68-DE-62-SZ-02-LI-

机加工自由公差等级表(mm)基本尺寸孔轴长度大于至H12H13h12h13js12js13++030 ++0360 ±++061000 ++0101800 ±++0183000 ±±++030500 ±±++050800 ±±++08012000 ++012018000 ±++018025000 ±±++02503150 ±++03154000 ±±++040050000 ±±++050063000 ±±++063080000 ±++080010000 ±++0100012500 ++01250160000 ±++01600200000 ±±++02000250000 ±±++02500315000

公差等级查询表

1.线性尺寸的极限偏差数值(GB/T1804-2000)公差等级基本尺寸分段(mm)尺寸0.5~3>3~6>6~30>30~120>120~400>400~1000>1000~2000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2粗糙e±0.2±0.3±0.5±0.8±1.2±2±3最粗V..±0.5±1±1.5±2.5±4±62.倒圆半径和倒角高度尺寸的极限偏差(GB/T1804-2000)公差等级基本尺寸分段(mm)尺寸0.5~3>3~6>6~30>30精密f±0.2±0.5±1±2中等m粗糙e±0.4±1±2±4最粗v3.角度尺寸的极限偏差数值(GB/T1804-2000)公差等级基本尺寸分段(mm)尺寸~10>10~50>50~120>120~400>400精密f±1°±30±20±10±5中等m粗糙e±1°30±1°±30±20±10最粗v±3°±2°±1°±30±20

1.线性尺寸的极限偏差数值（GB/T1804-2000）（mm）公差等级基本尺寸分段0.5~33~66~3030~120120~400400~10001000~2000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2粗糙e±0.2±0.3±0.5±0.8±1.2±2±3最粗v--±0.5±1±1.5±2.5±4±62.倒圆半径和倒角高度尺寸的极限偏差（GB/T1804-2000）mm公差等级基本尺寸分段0.5~33~66~3030精密f±0.2±0.5±1±2中等m粗糙e±0.4±1±2±4最粗v3.角度尺寸的极限偏差数值（GB/T1804-2000）公差等级基本尺寸分段~1010~5050~120120~400400精密f±1°±30±20±10±5中等m粗糙e±1°30±1°±30±20±10最粗v±3°±2°±1°±30±204.未注形位公差按GB/T1184-K4.1直线度和平面度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围1010~3030~100100~300300~10001000~3000H0.030.050.10.20.30.4K0.050.10.20.40.60.8L0.10.20.40.81.21.64.2垂直度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围100100~300300~10001000~3000H0.20.30.40.5K0.40.60.81L0.411.524.3对称度未注公差值（GB/T1184-1996）（mm）公差等级基本长度范围100100~300300~10001000~3000H0.5K0.60.81L0.611.524.4圆跳动的未注公差值

1.线性尺寸的极限偏差数值（GB/T1804-2000）公差等级基本尺寸分段（mm）尺寸0.5~33~66~3030~120120~400400~10001000~2000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2粗糙e±0.2±0.3±0.5±0.8±1.2±2±3最粗v--±0.5±1±1.5±2.5±4±62.倒圆半径和倒角高度尺寸的极限偏差（GB/T1804-2000）公差等级基本尺寸分段（mm）尺寸0.5~33~66~3030精密f±0.2±0.5±1±2中等m粗糙e±0.4±1±2±4最粗v3.角度尺寸的极限偏差数值（GB/T1804-2000）公差等级基本尺寸分段（mm）尺寸~1010~5050~120120~400400精密f±1°±30±20±10±5中等m粗糙e±1°30±1°±30±20±10最粗v±3°±2°±1°±30±204.未注形位公差按GB/T1184-K4.1直线度和平面度未注公差值（GB/T1184-1996）公差等级基本长度范围（mm）尺寸1010~3030~100100~300300~10001000~3000H0.030.050.10.20.30.4K0.050.10.20.40.60.8L0.10.20.40.81.21.64.2垂直度未注公差值（GB/T1184-1996）公差等级基本长度范围（mm）尺寸100100~300300~10001000~3000H0.20.30.40.5K0.40.60.81L0.411.524.3对称度未注公差值（GB/T1184-1996）公差等级基本长度范围（mm）尺寸100100~300300~10001000~3000H

c9 d8 e7 e8 f7 g6h5h6h7 h8 js6 js7k6 m6 n6 p6 -60 p7 -20 r6 -14 -14 s6 -6 -20 0 0 0 6 8 10 3 12 16 16 20 -85 34 -1 -24 ±3 -1 ±5 -28 -16 -8 -4 -6 0 2 4 6 0 6 4 10 14 -70 -30 -20 -20 -10 -40 0 0 0 9 12 16 -10 0 20 6 24 3 23 27 2 8 48 ±4 -32 -22 ±6 38 -8 -5 4 1 8 12 12 15 19 -80 40 -25 25 -13 -50 0 0 0 10 15 -11 6 19 24 10 6 30 28 32 4 -1 62 -2 ±4.5 40 -28 ±7 47 -6 -9 1 6 10 5 15 2 15 19 23 -95 -50 -32 -32 -16 -60 0 0 0 12 -13 8 23 18 1018 29 36 34 39 1 -1 -2 8 7 -1 77 8 ±5.5 -50 ±9 59 -34 7 1 12 18 23 18 28 -11 0 1824 65 -40 -40 -20 -7 0 0 0 0 15 2128 35 43 41 ±1 48 -16 2 -1 ±6.5 2430 -2 29 -2 98 -61 0 -73 -41 9.3 2 0 8 15 22 13 22 28 35 -12 0 -50 80 -25 -50 -90 0 0 0 182533 3040 42 51 50 59 -11 9 -18 -2-1 5 1 -1 6 -2-3 5 9 75 -89 -50 2 2 17 9 26 ±1 2 2634 43 -13 ±8 0 4050 19 2 -14 -10 0 -1 0 0 60 -60 -30 0 0 00 213139 5065 51 62 60 72 21 -14 6 -10 6 -2 -1 9 3 -1 -3 0 6 -4 90 -60 4 1120 2 9 32 32 41 53 ±1 -15 ±9.5 5 0 6580 6278 -22 4 43 59 -12 0 -17 72 -72 -36 0 0 10 0 0 0 253545 2 80 59 72 73 93 0 -25 -17 4 -10 7 -12 6 -3 4 5 -1 -3 -5 5 4 -2 -71 7 3 1323 2 37 37 51 71 ±1 -18 ±11 7 1012 0 0 0 10 76 -26(1 54 79 20 14 5 -1 85 -43 85 12 0 0 0 0 14 0 0 0 11 4 28 4052 68

一、GB/T1804－2000线形尺寸的极限偏差数值公差等级基本尺寸分段0.5 \sim 3>3 \sim 6>6 \sim 30>30 \sim 120>120 \sim 400>400 \sim 1000>1000 \sim 2000>2000~4000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2±2粗糙c \pm 0.2 \pm 0.3 \pm 0.5 \pm 0.8 \pm 1.2 \pm 2 \pm 3 \pm 4最粗v±0.5±1±1.5±4±6±8二、(GB/T1804-2000)倒圆半径和倒角高度尺寸的极限偏差数值公差等级基本尺寸分段0.5 \sim 3>3 \sim 6>6 \sim 30>30精密f±0.2±0.5±1±2中等m粗糙c±0.4±1±2±4最粗v注:倒圆半径和倒角高度的含义参见GB/T6403.4三、(GB/1804-2000)角度尺寸的极限偏差数值公差等级长度分段～10>10 \sim 50>50 \sim 120>120 \sim 400>40)精密f \pm 1^{\circ} \pm 30' \pm 20' \pm 10' \pm 5'中等m粗糙c \pm 1^{\circ}30' \pm 1^{\circ} \pm 30' \pm 15' \pm 10'最粗v \pm 3^{\circ} \pm 2^{\circ} \pm 1^{\circ} \pm 30' \pm 20'四、(GB/T1184—1996)直线度和平面度的未注公差值公差等级基本长度范围\le 10>10 \sim 30>30 \sim 100>100 \sim 300>300 \sim 1000>1000 \sim 3000H0.020.050.10.20.30.4K0.050.10.20.40.60.8L0.10.20.40.81.21.6五、(GB/T1184-1996)垂直度未注公差值公差等级