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

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

图1球阀阀体（O形圈）主要尺寸图表1球阀阀体（O形圈）主要尺寸表单位：mmABCDEFG3~6+0.05/0±0.1/±0.06±0.04±0.1/>6~15+0.06/0±0.2+0.1/0±0.08±0.05±0.1±0.13>15~30+0.07/0±0.2+0.12/0±0.1±0.06±0.2±0.15>30~60/±0.25+0.13/0±0.13±0.06/±0.2>60~120/±0.3+0.16/0±0.16±0.08/±0.25>120~200/±0.4+0.2/0±0.2±0.1//>200/±0.5/////图2球阀阀体（填料）主要尺寸图表2球阀阀体（填料）主要尺寸表单位：mmABCDEFGH3~6+0.1/0±0.1/±0.06±0.04±0.1/+0.1/0>6~15+0.18/0±0.2+0.1/0±0.08±0.05±0.1±0.13+0.16/0>15~30+0.2/0±0.2+0.12/0±0.1±0.06±0.2±0.15+0.18/0>30~60+0.3/0±0.25+0.13/0±0.13±0.06/±0.2+0.25/0>60~120/±0.3+0.16/0±0.16±0.08/±0.25/>120~200/±0.4+0.2/0±0.2±0.1///>200/±0.5//////1.2阀盖主要尺寸公差如图3和表3所示。图3球阀阀盖主要尺寸图表3球阀阀盖主要尺寸表单位：mmABCD3~6±0.05±0.1/±0.05>6~15±0.06±0.2+0.1/0±0.06>15~30±0.08±0.2+0.12/0±0.08>30~60±0.1±0.25+0.13/0±0.1>60~120/±0.3+0.16/0/>120~200/±0.4+0.2/0/>200/±0.5//1.3球体主要尺寸公差如图4和表4所示。图4球阀球体主要尺寸图表4球阀球体主要尺寸表单位：mmABC3~6±0.015±0.1+0.03/0>6~15±0.02±0.2+

公差值基本尺寸IT4IT5IT6IT7IT8IT9IT10T111IT12IT13IT14IT15大于IT16到IT17TT18μmmm334_610142540600.100.140.250.400.6031.061.445812183048750.120.180.300.480.751.26101.846915223658900.150.220.360.580.90101.51852.2811182743701100.180.270.430.701.10181.83062.7913213352841300.210.330.520.841.302.1305073.311162539621001600.250.390.621.001.602.5508083.913193046741201900.300.460.741.201.90803.01204.61015223554871402200.350.540.871.402.201203.5180125.4182540631001602500.400.631.001.602.504.0180250146.3202946721151852900.460.721.151.852.902503154.67.216233252811302103200.520.811.302.103.205.23154008.118253657891402303600.570.891.402.303.604005.75008.920274063971552504000.630.971.552.504.006.39.7注:基本尺寸小于1mm时,无IT14至IT18。线性尺寸未注公差的公差表根据国际标准,以下为线性尺寸未注公差的公差表。这个未注公差适用于金属切削加工的尺寸,也适用于一般的冲压加工尺寸。这些极限偏差适用于:线性尺寸:例如外尺寸、内尺寸、阶梯尺寸、直径、半径、距离、倒圆半径和倒角高度;角度尺寸:包括通常不标出角度值的角度尺寸,例如直角(90°);机加工组装件的线性和角度

公差值IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT18µmmm于到-334636101522361058181100.180.270.430.701.101.82.76918841300.210.330.520.841.302.13.33073011162539621001600.250.390.621.001.602.53.9505088080120180250315400线性尺寸：例如外尺寸、内尺寸、阶梯尺寸、直径、半径、距离、倒圆半径和倒角高度；这些极限偏差不适用于：表1线性尺寸的极限偏差数值尺寸分段>30>120>400120400±±-±±±0.3±±±0.8级)0.20.30.5-±1±1.5±4±6表2倒圆半径与倒角高度尺寸的极限偏差数值尺寸分段公差等级0.53>36>630>30±0.2±0.5±2±1±4公差等级>1050>50120>120400>400±30'±10'f(精密级)m(中等级)±1°±5'c(粗糙级)±1°v(最粗级)±2°±3°位置公差定位公差是关联实际要素对基准在位置上允许的变动全量。这类公差包括同轴度、对称度、位置度3项。符号简要描述符号简要描述直线度是表示零件平行度是表示零上的直线要素实际形状保持理想直线的状况。也就是通常所说的平直程度。直线度公差是实际件上被测实际要素相对于基准保持等距离的状况。也就是通常所说的保持平行的程度。直线�

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

基本尺寸公差等IT01级It0It1It2It 3It4It5It6It7It8It9It10It11It12It13It14It15(um)1t163It170.3It180.50.81.22346(mm)1014>3~625400.4600.61001141.5.252.5404.6051.08>6~10121.4180.4300.6481751.51202.5.184.30694815.75>10~18221.2361.80.5580.8901.215023.223655889011>18~301.518272.20.6437011101.5x2.5180.276.439.70131.1211.8>30~50332.7520.61841.5130A2.5\21033.5211.84161.3>50~80252.1393.3620.81001.2216025035.39862131.01.6192.530>80~120463.97411201.52.519043006.4610.74151.2221.9>120~180353.0541.2874.621403.5522083505412.8718251.42.240>180~2503.5631005.4216034.525040076310141.0201.62.529>250~315464.0726.32.511541852906846012.721.1516231.85322.9>315~40052814.6513057.221073209520.81131.3182.1253.236>400~5005.257898.1414023068360105701589201.4272.3403.6635.7971558.9250400630.971.52.54.06.39.75

_加工尺寸公差对照表单位：μm基本尺寸mm5678基本尺寸mm56781018811182718025020294672183091321332503152332528130501116253931540025365789508013193046400500274063978015223554_基本尺寸mm5678基本尺寸mm567812012018018254063同轴度、圆跳动平行度、垂直度圆度、圆柱度尺寸范围公差等级567尺寸范围公差等级567尺寸范围公差等级56710185812101661015101823518306101516258122018302.546_基本尺寸mm5678基本尺寸mm5678305081220254010152530502.547501201015254063122030508035812025012203063100152540801204610250500152540100160203050120180581250080020305016025025406018025071014800125025406025040030508025031581216_基本尺寸mm5678基本尺寸mm56781250200030508040063040601003154009131820003150406010063010005080120400500101520_

1.线性尺寸的极限偏差数值(GB/ T1 8 04 - 2 00 0)(mm)公差等基本尺寸分段级>>>>0.5~3 > 6~30 30~120 120~400 400~1000 1000~2000 3~6 士士精密f 士0.1 士0.15 士0.2 士0.3 士0.5 0.05 0.05 士中等m 士0.1 士0.2 士0.3 士0.5 士0.8 士1.2 0.1 士粗糙e 士0.2 士0.5 士0.8 士1.2 士2 士3 0.3 士-- 最粗v 士1 士1.5 士2.5 士4 士6 0.5 2.倒圆半径和倒角高度尺寸的极限偏差(GB/T1804-2000)mm公差等基本尺寸分段级0.5~3 > 3~6 > 6~30 > 30 精密f 士0.2 士0.5 士1 士2 中等m 粗糙e 士0.4 士1 士2 士4 最粗v 3.角度尺寸的极限偏差数值(GB/T1804-2000)公差等基本尺寸分段级>~10 >10~50 >50~120 > 400 120~400 精密f 士1°士30士20士10士5中等m 士1°粗糙e 士1°士30士20士1030最粗v 士3°士2°士1°士30士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公差等基本长度范围级>>>>< 10 >10~30 30~100 100~300 300~1000 1000~3000 H 0.03 0.05 0.1 0.2 0.3 0.4 K 0.05 0.4 0.1 0.2 0.6 0.8 L 0.1 0.2 0.4 0.8 1.2 1.6 4.2垂直度未注公差值(GB/T1184-1996)(mm公差等基本长度范围级>< 100 >300~1000 100~300 1000~3000 H 0.2 0.3 0.4 0.5 K 0.4 0.6 0.8 1 L 0.4 1 1.5 2 4

ISO轴公差表(ISO)0.001c9d81..e7e8f7h5g6h6h7js6h8js7k6m6n6p6p7r6-60-20S6-14-14-6-20300 0+6+8-85+10-34+12-24+16-28±3+1616±5-8+20-4-6-10-140+2+4+6-70+6-30-20+10-20+14-10-4030600+9+12100+16-48+2032+24±438+2322±6-12+27-5-8-12-18+1+4+8+12-80+12-40-25+15-25-13+19-56001000+10+15+19116-62+24+30-40±4.5-47+28-28±7-6-14+32-9-15-22+1+6+10+15-95+15-50-32+19-32-16+23-601001800+12+18+23+29138-77-50+36±5.5-59+34-34-17±9-8+39-11-18-27+1+7+12+1818+1824+23+28-110-65-40-40-20-7000+15+210-13+281623024+35-98+43-61±6.5-73+41-41±10-9-20+48-21-33+2+8+15+22+22+28-120+353040182-80-50-89-25-50-50-9-250000+18+2+25+42+26+33-130-119-75+51+50±8±12+59-115040-16-25-39+9+17-192+26+34+43-1405065214100-146-60-90+60-60-106-30-60-10-29+720-19000+21+2+31+39+11+20+51+32150+62+41±9.5±15+5365-1380-30-46224+32+62+78-170+43+5980100-257120-174-72-107-72-126+73-36-71-1234-15+930-22000+3+13+23+25+35+45+59+37+72+37180+51H11+71±1/100120-35-54267+76+101-200300+54+79120140+88+117-145-208210-85-125+63-85-148-43-83-14-39-18+920-2514016000J+28+3+40+52+15+27+68+43310+83+43±12.5±20+125-40+90+65-63230+100160180330+93+133240+68+108180200355+106+151-170-242260-100-146+77-100-172-50-96-15-44-20+1220-292002250072+60+31+33+4

公差等级查询表