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

标准公差表根据国际标准，以下为基本尺寸0-500mm, 4-18 级精度标准公差表。基本尺寸公差值IT4 IT5 IT6 IT7 IT8 IT9 IT10 IT11 IT12 IT13 IT14 IT15 IT16 IT17 IT18 大于到µm mm - 3 3 4 6 10 14 25 40 60 0.10 0.14 0.25 0.40 0.60 1.0 1.4 3 6 4 5 8 12 18 30 48 75 0.12 0.18 0.30 0.48 0.75 1.2 1.8 6 10 4 6 9 15 22 36 58 90 0.15 0.22 0.36 0.58 0.90 1.5 2.2 10 18 5 8 11 18 27 43 70 110 0.18 0.27 0.43 0.70 1.10 1.8 2.7 18 30 6 9 13 21 33 52 84 130 0.21 0.33 0.52 0.84 1.30 2.1 3.3 30 50 7 11 16 25 39 62 100 160 0.25 0.39 0.62 1.00 1.60 2.5 3.9 50 80 8 13 19 30 46 74 120 190 0.30 0.46 0.74 1.20 1.90 3.0 4.6 80 120 10 15 22 35 54 87 140 220 0.35 0.54 0.87 1.40 2.20 3.5 5.4 120 180 12 18 25 40 63 100 160 250 0.40 0.63 1.00 1.60 2.50 4.0 6.3 180 250 14 20 29 46 72 115 185 290 0.46 0.72 1.15 1.85 2.90 4.6 7.2 250 315 16 23 32 52 81 130 210 320 0.52 0.81 1.30 2.10 3.20 5.2 8.1 315 400 18 25 36 57 89 140 230 360 0.57 0.89 1.40 2.30 3.60 5.7 8.9 400 500 20 27 40 63 97 155 250 400 0.63 0.97 1.55 2.50 4.00 6.3 9.7注：基本尺寸小于1mm 时，无IT14 至IT18。参考医学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

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+

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

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

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

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

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

标准公差数值公差等级基本尺寸IT4IT5IT6IT7IT8IT9IT10IT11IT12(um)≤33461014254060100>3~64581218304875120>6104691522365890150>10^{-}18581118274370110180>18^{\circ}30691321335284130210>30^{\circ}5071116253962100160250>50^{\circ}8081319304674120190300>80^{\circ}120101522355487140220350>120^{\circ}1801218254063100160250400>180^{\circ}2501420294672115180290460>250 \sim 3151623325281130210320520>3154001825365789140230360570>400^{\circ}5002027406397155250400630>500 \sim 63022324470110170280440700>630 \sim 80025365080125200320500800>800^{\circ}100029405690140230360560900>100012503347661051652604206601050>125016003955781251953105007801250>160020004665921502303706009201500>200025005578110175280440700110017502500^{\circ}3150689613521033054086013502100>3150400084115165260410660105016502600>4000^{\circ}5000100140200320500800130020003200>50006300125170250400620980155025004000>630080001552153104907601200195031008000^{\circ}1000049001952703806009401500240038006000基孔制优先、常用配合基轴准defghisk孔mn间隙配合p过渡配合过盈配合H6H6/f5H6/g5H6/h5H6/js 5H6/k5H6/m5H6/n5H7H6/p5H7/f6H7/g6H7/h6H7/js 6H7/k6H7/m6H7/n6H7/p6H8/e7H8/f7H8/g7H8/h7H8H8/js7H8/k7H8/m7H8/n7H8/p7H

(GB1800-79)自尺>>>umm>>>寸>>1>3>6>公>1018>段>30>>5080120>13>180-1差250260>315/>/360/>400/5001/630带800/10001//12501600/62000/250010//18I3050/80120//180I250D260315+10+130/360/400+16500+19630+23+27800+301000+351250+401600+452000+450+502500+5031500+600+600+700+800+900+10000+1100H7+100+1200+120+1300+1500+150+180+210+250+300+350+40+460+520+52+5700+570+630+700+800+900+105+1250000d0+1500+17500+2100000000000000000-600-800-100-120-140-170-20-230-270-300-30h600-3500-3500-400-400-45-5000-5500-60-650-7500-6-85-80-9-10000-110-13-160-190-220-250-29D60-32+13-320+17-360-36+21+25-40+30-44+35-50+42-56+50-66+60-78+70+70-92-110+3+80+4+80-135+5+90+6+90+105+8+10+120+12+135+15+150+18+165+22G7+180+22+12+26+200+26+16+230+30+20+30+24+28+35+34+40+40+45+47+50+54+55+61+60+69+2+70+69+4+75+5+0+75+6+83+92+7+104+9+10+116+12+133+14+155+15d6+182+17-3+209+17-4+18-5+248+18-6+20-8+22-10+24-12-15+26+28-18+30-22-9+32-22-26+34-26-12-30-15+38-18-30-22-35-27-40-32-38-45-50-45-55-52-60-52g6-2-60-70-60-4-70-5-80-6-70-7-80-9-90-10-100-12-110-120-14-15-135-8-17-17-155-18-12-18-14-180-17-20-20-22-25-24-29-34-26-28-39-30-44D3-32-49+140-4934-54+18+22-54-38+27-60+33-66+39-74+46-82+54-94+63-108+73-124+73-144+840-173+840+950+9

等基本尺寸m m公差带级>10~18>18~30>30~50>50~80>80~120>120~180>180~250>250~3159。 --43-52-62-74-87-100-115130K5+9+11+13+15+18+21+24+27+1+2+2+2+3+3+4+46+12+15+18+21+25+28+33+36+1+2+2+2+3+3+3+47+19+23+27+32+38+43+50+56+1+2+2+2+3+3+4+4M5+15+17+20+24+28+33+37+43+7+8+9+11+13+15+17+206+18+21+25+30+35+40+46+52+7+8+9+11+13+15+17+207+25+29+34+41+48+55+63+72+7+8+9+11+13+15+17+20N5+20+24+28+33+38+45+51+57+12+15+17+22+23+27+31+346+23+28+33+39+45+52+60+66+12+15+17+20+23+27+31+347+30+36+42+50+58+67+77+86+12+15+17+20+23+27+31+34P5+26+31+37+45+52+61+70+79+18+22+26+32+37+43+50+566+29+35+42+51+59+68+79+88+18+22+26+32+37+43+50+567+36+43+51+62+72+83+96+108+18+22+26+32+37+43+50+56

A(1 ( 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 \sim 30+0.07/0±0.2+0.12/0±0.1±0.06±0.2±0.15>30 \sim 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 \sim 200/±0.4+0.2/0±0.2±0.1//>200/±0.5/////2(.)DE图2球阀阀体(填料)主要尺寸图ABCDEFGH3~6+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 \sim 30+0.2/0±0.2+0.12/0±0.1±0.06±0.2±0.15+0.18/0>30 \sim 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//////单位：mm1.2阀盖主要尺寸公差如图3和表3所示。BC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 \sim 30±0.08±0.2+0.12/0±0.08>30 \sim 60±0.1±0.25+0.13/0±0.1>60~120/±0.3+0.16/0/>120 \sim 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。10A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+