Universal Hardness Tester Prototype
26:40
Clinometer Reconditioning: Testing Accuracy
7:39
Brinell Hardness Testing
14:03
Test HRC @ Home… Steel Hardness Testing On A Budget!!!
6:10
Does isopropanol make a difference?
24:44
How hard can it be? Part I (building a full range Vickers and Rockwell hardness tester)
29:03
Hints on Spindle Bearing Adjustment
54:05
Wolpert Testor HT2a Hardness Tester
12:03