Rockwell Hardness Tester

Rockwell Hardness Tester

Rockwell Superficial tests consists of forcing an indentor (Diamond or Ball) into the surface of a test piece in two steps i.e. first with preliminary test force and thereafter with additional test force and then measuring depth of indentation after removal of additional test force (Remaining preliminary test force active) for measurement of hardness value.
The operation is exactly same as above. However, the diameter of impression is measured outside of machine by Brinell microscope.
Brinell hardness number is found out by referring corresponding hardness tables showing hardness number against dia. of indentation for ball diameter and test force.
(Total Test Force of 588.4,980.7,1471N (60,100,150 kgf)

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