HARDNESS TESTING MACHINE : SERIES RASN

PRINCIPLE

Rockwell & 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 & the measuring depth of indentation after removal of additional test force (Remaining preliminary test force active) for measurement or hardness value. OPERATION : For Rockwell & Rockwell Superficial

In case of 'RASN' series machines for Rockwell or Rockwell Superficial Test a preliminary test force in first applied & then indicator is automatically set for zero. Quickly thereafter & additional test force is applied without removing the preliminary test force. When the penetration is stabilized, the additional test force is removed & the hardness number is shown directly on the indicator.

For rockwell Test

The operation is exactly same as above. However, the diameter of impression is measured out side of machine by rockwell microscope. rockwell hardness number is found out by referring corresponding hardness tables showing hardness number against di. of indentation for specified ball diameter and test force.

• Model RASN
• Model RASN (M)
• Model RASN (E) : (Digital)