本页导航 广告链接

标准公差数值(摘自GB/T 1800.3-1998)

基本尺寸标准公差等级
/mm IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT18
大于μmmm
30.81.2234610142540600.10.140.250.40.611.4
3611.52.545812183048750.120.180.30.480.751.21.8
61011.52.546915223658900.150.220.360.580.91.52.2
10181.2235811182743701100.180.270.430.71.11.82.7
18301.52.546913213352841300.210.330.520.841.32.13.3
30501.52.54711162539621001600.250.390.6211.62.53.9
5080235813193046741201900.30.460.741.21.934.6
801202.5461015223554871402200.350.540.871.42.23.55.4
1201803.55812182540631001602500.40.6311.62.546.3
1802504.571014202946721151852900.460.721.151.852.94.67.2
250315681216233252811302103200.520.811.32.13.25.28.1
315400791318253657891402303600.570.891.42.33.65.78.9
4005008101520274063971552504000.630.971.552.546.39.7
50063091116223244701101752804400.71.11.752.84.4711
630800101318253650801252003205000.81.2523.25812.5
8001000111521284056901402303605600.91.42.33.65.6914
100012501318243347661051652604206601.051.652.64.26.610.516.5
125016001521293955781251953105007801.251.953.157.812.519.5
160020001825354665921502303706009201.52.33.769.21523
20002500223041557811017528044070011001.752.84.471117.528
25003150263650689613521033054086013502.13.35.48.613.52133
注:1.基本尺寸大于500mm的IT1至IT5的标准公差数值为试行。
2.基本尺寸小于等于1mm时,无IT14至IT18。

IT01和IT0的标准公差数值

基本尺寸标准公差等级基本尺寸标准公差等级
/mmIT01IT0/mmIT01IT0
大于公差/μm大于公差/μm
30.30.58012011.5
360.40.61201801.22
6100.40.618025023
10180.50.82503152.54
18300.6131540035
30500.6140050046
50800.81.2   

基本尺寸为3150mm至10000mm的标准公差数值

基本尺寸/mm 公差等级
IT6 IT7 IT8 IT9 IT10 IT11 IT12 IT13 IT14 IT15 IT16 IT17 IT18
大于 μm mm
3150 4000 165 260 410 660 1050 1650 2.60 4.10 6.6 10.5 16.5 26.0 41.0
4000 5000 200 320 500 800 1300 2000 3.20 5.00 8.0 13.0 20.0 32.0 50.0
5000 6300 250 400 620 980 1550 2500 4.00 6.20 9.8 15.5 25.0 40.0 62.0
6300 8000 310 490 760 1200 1950 3100 4.90 7.60 12.0 19.5 31.0 49.0 76.0
8000 10000 380 600 940 1500 2400 3800 6.00 9.40 15.0 24.0 38.0 60.0 94.0