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
IT4IT5IT668911131619222529323640IT7μm101215182125303540465257631418222733394654637281899725303643526274871001151301401554048587084100120140160185210230250IT8IT9IT10大于到-3343645610461018581830693050711508081380120101512018012181802501420250315162331540018254005002027注：基本尺寸小于1mm时，无IT14至IT18。轮廓的平轮廓最大不平度平均算术偏取样长度光洁度高度均高度差RyRzRal符号0.050.050.0130.10.10.025-ssss0.20.20.050.40.40.10.80.80.20.251.61.60.4sss0.83.23.20.86.36.31.612.512.53.2ss2.5-18-186.32525-35-35505012.5s--70-7025100100-140140200200---280-280-50400400-100-560-560公差值IT11607590110130160190220250290320360400IT120.10.120.150.180.210.250.30.350.40.460.520.570.63IT130.140.180.220.270.330.390.460.540.630.720.810.890.97IT140.250.30.360.430.520.620.740.8711.151.31.41.55IT15mm0.40.480.580.70.8411.21.41.61.852.12.32.5IT160.60.750.91.11.31.61.92.22.52.93.23.64IT1711.21.51.82.12.533.544.65.25.76.3IT181.41.82.22.73.33.94.65.46.37.28.18.99.7
4-18级精度标准公差表
