I bought this 50 years old Rockwell hardness tester for cheap and in this video I present you the months long process of getting it back to working order. This machine is awesome. It weights like an anvil, over 80kg (176lbs) and the way it works is fascinating, with mirrors, translucent scales and old style light bulbs to amplify the distance the diamond cone is pushed into the material and enable down to 0.1 HRC measurements.

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