Cemented Carbide Tool Hardness Comparison Table - Part3

When the first reference load pressure, and then use the pressure of the main carrier, and then restored to the reference load, the value calculated based on the depth of the pit before and after the two reference load difference is the Rockwell hardness.

Indenter used in Rockwell hardness test, 1/16in (1.588mm diameter) ball indenter (ball or tungsten carbide ball) and the diamond indenter (120 ° apex angle of the cone). Both pressure head need to be used separately. Because the main load varied, therefore, the combination of the pressure head and the main load is also varied. Depending on the combination of, are divided into A, B, C.......

Shore hardness (Hs) is frequently used in the machine shop job site test methods. Shore hardness test method with other hardness test method, i.e. the pressing head pressed into the formation of pits to determine the size of the hardness test method is completely different. It fell on front-end punch diamond the workpiece hardness test, test method determines the hardness value of its rebound height. The harder the workpiece, the punch, the greater springback value.