This tester is a popular type Rockwell hardness testing machine, the construction is firm and reliable and safe, operating convenience etc. characteristics.The adoption adds to unload automatically to experiment the dint method, protecting time of stable, dissolves artificial operation error margin, show the worth accuracy high. That degree of hardness accounts to be applicable to the black metals and have the Rockwell surname degree of hardness measurement of the color metals.It is extensive to be applicable to factory car with calculate the section. ________________________________________ Specifications Preliminary test force 98N Total test force(N)588,980,1471N Total test force dwell time(s) 1-30 Hardness Indication Digital Power Supply AC220V/50HZ Distance from Indeneter's center to OuterWall 140mm Machine Size(DXWXH)(mm) 463 ?175?60 Weight(kg) 75 Degree of hardness test seope HRA 20-88 HRB 20-100 HRC 20-70