Hardness scale HRA, HRB, HRC, HRD, HRF, HRG, HR15N, HR30N, HR45N, HR15T, HR30T. HR45TPreliminary test force 29.4N/3kgf for superficial Rockwell 98N/10kgf for Rockwell.Display analogue. Stage elevation manual. Load control manual. Min. reading 0.5HR.Max. workpiece height 6.30"Max. workpiece depth 5.51"(from the center of indenter).
Hardness scale: HRA, HRB, HRC, HRD, HRF, HRG. Preliminary test force 10kg. Test force: 60kg, 100kg, 150kg. Load control manual. Min. reading 1HR. According to ISO 6508, ASTM E18.