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How to operate analog rockwell hardness tester

Feb 24, 2018

How to operate analog rockwell hardness tester:


1. Move the crank handle to the unloading position.

2.Select the proper indenter/penetrator and insert it into the plunger rod receiver.

3. Place the proper anvil into the elevating screw.

4. Select proper major load by turning the selector knob.

5. Place specimen or Rockwell test block on the anvil. Make sure the underside of the specimen is free from scale and burrs.

6. Raise specimen into contact with the indenter/penetrator by turning the capstan handwheel clockwise. Continue turning until the small pointer is near the red dot. Continue until the long pointer is in zero position (within 5 divisions, plus or minus). The minor load (10 kg for regular Rockwell and 3 kg for superficial Rockwell) is now fully applied.

7. Set the dial to zero. Adjust the dial gage until the zero set line is aligned behind the long pointer.

8. Pull forward on the load release bar to apply the major load.

9. When the long pointer is stable, within 2-3 seconds, return the crank handle to its unloading position. This removes the major load. (The minor load is still applied).

10. In this step you will get hardness result. Record the number that the long pointer is pointing to. (typically the C scale is in black and the B scale is in red)

11. Remove the minor load by turning the capstan handwheel counter-clockwise, lowering the elevation screw and specimen so that they clear the indenter/penetrator.

12. Remove the specimen or move to another area of the specimen or test block for additional testing. Be sure to be at least three indent diameters away from any other indention for accurate readings.