approved item | range (scope) | best calibration capability | |
---|---|---|---|
1 | auge | diameter10mm~50mm | 2.0μm |
2 | gauge | diameter10mm~50mm | 1.0μm |
3 | caliper(digital) | 0~150mm( resolution:0.01) | 0.02mm |
4 | outside micrometer(digital) | 0~50mm( resolution:0.001) | 0.003mm |
5 | 3-point bore gauge(scale type) | 0~50mm( resolution:0.002) | 0.004mm |
6 | surface roughness standardsparts | Ra:≦4μm | Ra:0.16μm |