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

基本尺寸基本尺寸mm标准公差等级IT1IT21T3IT4IT51T6177IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17大于至IT18ummm30.81.2_234610142540600.10.140.250.40.6131.4611.52.545812183048750.120.180.30.480.751.261.81011.52.546915223658900.150.220.360.580.91.510182.21.2235811182743701100.180.270.430.71.11.818302.71.52.546913213352841300.210.330.520.841.32.1303.3501.52.54711162539621001600.250.390.6211.62.550803.9235813193046741201900.30.460.741.21.93801204.62.5410615223554871402200.350.540.871.42.23.51205.41803.55812182540100631602500.40.6311.62.541806.32504.571410202946721151852900.460.721.151.852.94.62507.2315681216233252811302103200.520.811.32.13.25.23158.1400791318253657891402303600.570.891.42.33.65.74008.95001081520274063971552504000.630.971.552.546.39.750063011916223244701101752804400.71.11.752.84.4763080011101318253650801252003205000.81.2523.25880012.51000111521284056901402303605600.91.42.33.65.6914100012501318243347661051652604206601.051.652.64.26.510.5125016.516001521293955781251953105007801.251.953.157.8150012.5200019.51825354665921502303706009201.52.33.769.2152000232500223041557811017528044070011001.752.84.471117.52500315028263650689613521033054086013502.13.35.48.6注:1.基本

公差与配合〔摘自GB1800180479〕1．根本偏差系列及配合种类.2．标准公差值及孔和轴的极限偏差值标准公差值(根本尺寸大于6至500mm)公差等级根本尺寸mmIT5IT6IT7IT8IT9IT10IT11IT12>610691522365890150>101881118274370110180>183091321335284130210>30501116253962100160250>50801319304674120190300>801201522355487140220350>12018018254063100160250400>18025020294672115185290460>25031523325281130210320520>31540025365789140230360570>40050027406397155250400630孔的极限差值〔根本尺寸由大于10至315mm〕μm根本尺寸mm公差带等级>018>1830>3050>5080>80120>120180>180250>2503158+77+50+98+65+119+80+146+100+174+120+208+145+242+170+271+1909+93+50+117+65+142+80+174+100+207+120+245+145+285+170+320+190D10+120+50+149+65+180+80+220+100+260+120+305+145+355+170+400+19011+160+50+195+65+240+80+290+100+340+120+395+145+460+170+510+1906+43+32+53+40+66+50+79+60+94+72+110+85+129+100+142+1107+50+32+61+40+75+50+90+60+107+72+125+85+146+100+162+110E8+59+32+73+40+89+50+106+60+126+72+148+85+172+100+191+1109+75+32+92+40+112+50+134+60+159+72+185+85+215+100+240+11010+102+32+124+40+150+50+180+60+212+72+245+85+285+100+320+1106+27+16+33+20+41+25+49+30+58+36+68+43+79+5

常用标准公差数值μm/mm大于，至IT5IT6塑料件3、4、IT7IT8IT95级公差值IT10IT11IT12IT13IT14~34大于，至6103级14254级405级600.100.140.253~65812~3180.0830480.12750.160.120.180.306~1063~6915220.0836580.140.18900.150.220.3610~1886~101118270.100.1643700.201100.180.270.4318~30910~1413210.12330.18520.22841300.210.330.5230~5014~181116250.12390.20621000.241600.250.390.6250~801318~2419300.14460.22741200.281900.300.460.7480~1201524~3022350.16540.24871400.322200.350.540.87120~1801830~4025400.18631000.261602500.360.400.631.00180~2502040~502946720.201150.281850.402900.460.721.15250~3152350~6532520.22811300.322100.463200.520.811.30315~4002565~803657890.261400.382300.523600.570.891.40400~5002780~10040630.30971550.442500.600.634000.971.55500~630100~12030440.34701100.501752800.684400.701.101.75630~80035120~140500.38801250.562003200.765000.801.252.00800~100040140~160560.4290|1400.622300.843605600.901.402.30160~1800.460.680.92GB/T1184-1996直线、平面度未注公差180~2000.500.741.00公差等级200~225基本长度范围0.560.821.10~1010~3030~100225~250100~300]300~10000.620.901000~30001.20H0.020.050.1250~2800.20.680.31.001.300.4K0.050.10.20.40.60.80.10.20.40.81.21.6GB/T1804-92