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1、塑件精度表（SJ1372-78）类别塑件品种建议采用的精度等级高精度一般精度低精度1聚苯乙烯苯乙烯-丁二烯腈共聚体（ABS）聚甲基丙烯酸甲酯聚碳酸酯聚砜聚笨醚酚醛塑料氨基塑料30%玻璃纤维增强塑料3452聚酰胺 6、66、610、9、10氯化聚醚聚氯乙烯（硬）4563聚甲醛聚丙烯聚乙烯（高密度）5674聚氯乙烯（软） 聚乙烯（低密度）678注：（1）其它材料可按加工尺寸稳定性，参加上表选择精度等级。（2）1、2级精度为精度技术级，只有在特殊条件下采用。（3）选用精度等级时应考虑脱模斜度对尺寸公差的影响。塑件公差数值表公差尺寸（mm）精度等级12345678公差数值（mm）30.040.060.
2、080.120.160.240.320.48360.050.070.080.140.180.280.360.566100.060.080.100.160.200.320.400.6110140.07 10.090.120.180.220.360.440.7214180.08 10.100.120.200.240.400.480.8018240.090.110.140.220.280.440.560.8824300.100.120.160.240.320.480.640.9630400.110.130.180.260.360.520.721.0440500.120.140.200.280.400
3、.560.801.2050650.130.160.220.320.460.640.921.4065800.140.190.260.380.520.761.041.60801000.160.220.300.440.600.881.201.801001200.180.250.340.500.681.001.362.001201400.280.380.560.761.121.522.201401600.310.420.620.841.241.682.401601800.340.460.680.921.361.842.701802000.370.500.741.001.502.003.00200225
4、0.410.560.821.101.642.203.302252500.450.620.901.201.802.403.602502800.500.681.001.302.002.604.002803150.550.741.101.402.202.804.403153550.600.821.201.602.403.204.803554000.650.901.301.802.603.605.204004500.701.001.402.002.804.005.604505000.801.101.602.203.204.406.40注：标准中规定的数值以塑件成型后或经过必要的处理后，在相对湿度为 65%,温度为20C环境放置24小时后，以塑件和量具温度为 20C时进 行测量为准。