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/g/minilathe/files/5%29Charts_&_Tables
For some reason #8 did not downloading to my phone later today turn a real computer and get done. It is on hardness testing?
I like leaves no marks on finished parts.?
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The biggest cost in the plexiglass tube.
Today I use a ?" diameter ball bearing so if drop on floor I can find the ball.??
At one time I had Rockwell tester but it leaves a mark after testing not good on new parts.
It is nice easy useful project too.?
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The Mohs hardness is easier for looking for materials scratch and go with magnic. All do is use like pencil of few type of hardness , magnetic and tape and ready for material hunting.?
The magnic is good see steel or not and 300 series and 400. FYI Most avoid 400 and it is magnic will work hardened to glass?
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Dave?
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davesmith1800