鑄件尺寸公差與幾何公差數(shù)值表一、鑄件尺寸公差鑄件尺寸公差等級共分為16級，標記為DCTG1?DCTG16。表1：鑄件尺寸公差mm公稱尺寸鑄件尺寸公差等級(DCTG)及相應的線性尺寸公差值DCTG1DCTG2DCTG3DCTG4DCTG5DCTG6DCTG7DCTG8<100.090.130.180.260.360.520.741>10?160.10.140.20.280.380.540.781.1>16?250.110.150.220.30.420.580.821.2>25?400.120.170.240.320.460.640.91.3>40?630.130.180.260.360.50.711.4>63?1000.140.20.280.40.560.781.11.6>100?1600.150.220.30.440.620.881.21.8>160?250-0.240.340.50.711.42>250?400--0.40.560.781.11.62.2>400?630---0.640.91.21.82.6>630?1000---0.721.01.422.8>1000?1600---0.801.11.62.23.2>1600?2500------2.63.8>2500?4000-------4.4>4000?6300-------->6300?10000--------表1續(xù)：鑄件尺寸公差mm公稱尺寸鑄件尺寸公差等級(DCTG)及相應的線性尺寸公差值DCTG9DCTG10DCTG11DCTG12DCTG13DCTG14DCTG15DCTG16<101.522.84.2---->10?161.62.234.4---->16?251.72.43.24.6681012>25?401.82.63.65791114>40?6322.845.68101216>63?1002.23.24.469111418>100?1602.53.65710121620>160?2502.845.6811141822>250?4003.24.46.2912162025>400?6303.6571014182228>630?10004681116202532>1000?16004.6791318232937>1600?25005.48101521263342>2500?40006.29121724303849>4000?6300710142028354456>6300?10000-11162332405064說明：在默認條件下，鑄件的尺寸公差應相對于公稱尺寸對稱設置，即一半為正，另一半為負。如尺寸20mm,DCTG10級的鑄件尺寸公差為±1.2。對于壓鑄件，因其特殊的技術原因，可以采用不對稱的公差設置。二、鑄件幾何公差鑄件幾何公差等級分為7級，標記為GCTG2?GCTG8（GCTG1是為需要更高精度的幾何公差值預留的等級）。表2：鑄件直線度公差mm公稱尺寸鑄件幾何公差等級（DCTG）及相應的平面度公差GCTG2GCTG3GCTG4GCTG5GCTG6GCTG7GCTG8蕓100.080.120.180.270.40.60.9>10-300.120.180.270.40.60.91.4>30~1000.180.270.40.60.91.42>100~3000.270.40.60.91.423>300~10000.40.60.91.4234.5>1000~3000---3469>3000~6000---681218>6000~10000---12162436表3：鑄件平面度公差mm公稱尺寸鑄件幾何公差等級（DCTG）及相應的直線度公差GCTG2GCTG3GCTG4GCTG5GCTG6GCTG7GCTG8蕓100.120.180.270.40.60.91.4>10~300.180.270.40.60.91.42>30~1000.270.40.60.91.423>100~3000.40.60.91.4234.5>300~10000.60.91.4234.57>1000~3000---46914>3000~6000---8121828>6000~10000---16243656表4：鑄件圓度、平行度、垂直度和對稱度公差mm公稱尺寸鑄件幾何公差等級（DCTG）及相應公差GCTG2GCTG3GCTG4GCTG5GCTG6GCTG7GCTG8蕓100.180.270.40.60.91.42>10~300.270.40.60.91.423>30~1000.40.60.91.4234.5>100~3000.60.91.4234.57>300~10000.91.4234.5710

>1000~3000---691420>3000~6000---12182840>6000~10000---24365680表5：鑄件同軸度公差mm公稱尺寸鑄件幾何公差等級（DCTG）及相應的同軸度公差GCTG2GCTG3GCTG4GCTG5GCTG6GCTG7GCTG8蕓100.270.40.60.91.423>10~300.40.60.91.4234.5>30~1000.60.91.4234.57>100~3000.91.4234.5710>300~10001.4234.571015>1000~3000---9142030>3000~