Tolerances:  AFBMA Ball  Tolerances TableGradeSphericity in inchesSphericity in mmBasic Diameter Tolerance in inchesBasic Diameter 2 in mmMaximun Surface RoughnessG30.000003"0.0000762mm+/-0.00003"+/-0.000762mm0.5G50.000005"0.000127mm+/-0.00005"+/-0.00127mm0.8G100.000010"0.000254mm+/-0.0001"+/-0.00254mm1G250.000025"0.000635mm+/-0.0001"+/-0.00254mm2G500.000050"0.00127mm+/-0.0002"+/-0.00508mm3G1000.0001"0.00254mm+/-0.0005"+/-0.0127mm5G2000.0002"0.00508mm+/-0.001"+/-0.0254mm8G5000.0005"0.0127mm+/-0.002"+/-0.0508mm G10000.001"0.0254mm+/-0.005"+/-0.127mm 





About us
Zhuzhou Evergreen hardmetal Tools Co., Ltd., is a professional manufactuer of cemented carbide products in China, we have been in this line for more than 25 years. The tools made from us are with long life time and stable machining performance. If there is any interest please feel free to let us know, free samples are available.