Gumbiner Custom Knives
New Member
Hello y'all! I just recently picked up a wilson 4jr hardness tester from a retired guage maker for a steal. It came with everything included, all the weights, multiple tips, anvils, the works. However it is reading 1-2 point low on the test blocks. I know nothing about these machines or how to calibrate them. So I was hoping one of you fine folks would know more. Any knowledge and help is appreciated!
