Coupling technique I Equotip Hardness Testers I with Tom Ott

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I have not seen any video done that describes the coupling technique in great detail, so I have done one here. I used a standard Rockwell C test block that is about 0.375 inches thick.

The block is calibrated 45.2HRC and before coupling, I obtained measurements that averaged 35.4 HRC. After coupling the measurements averaged 44.6, well within the 1.5 HRC tolerance of the block.

So you can see those accurate measurements on small things can be obtained by the Leeb hardness testing method. But this is not convenient for testing a large number of pieces in a short amount of time. Better test methods for this are UCI or Equotip Portable Rockwell.

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hello sir, may i know what coupling agent can I use for this?

jonytan
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