What is this tool?

TomBoctou · Mar 12, 2020

A friend found this in a bucket of machine shop detritus:

3.5" diameter. The shaft is a taper, a bit smaller than #2 Morse but similar proportions. The high spots of the face are polished, making me think it has something to do with lapping. There are two lockable screws and a ball bearing pivot that allow the angle of the face to be set relative to the shaft.

DDoug · Mar 12, 2020

Looks like it should go on a Rockwell hardness tester, the base part, adjustable
to hold irregular objects, and present the testing face perpendicular to the
penetrator axis.

Limy Sami · Mar 13, 2020

digger doug said:
Looks like it should go on a Rockwell hardness tester, the base part, adjustable
to hold irregular objects, and present the testing face perpendicular to the
penetrator axis.

Thank you Doug!

I knew I'd seen one before, but couldn't place it.

TomBoctou · Mar 13, 2020

digger doug said:
Looks like it should go on a Rockwell hardness tester, the base part, adjustable
to hold irregular objects, and present the testing face perpendicular to the
penetrator axis.

I just looked at maybe a hundred pictures of Rockwell testers and didn't see anything with more than a superficial resemblance, which is that it's a small round table.

DDoug · Mar 13, 2020

tom_boctou said:
I just looked at maybe a hundred pictures of Rockwell testers and didn't see anything with more than a superficial resemblance, which is that it's a small round table.

"Looks Like" so maybe a custom made one ?

or maybe something completely else.

Or a brinell tester.

jmm03 · Mar 13, 2020

If it is not for a hardness tester it could be a tool used in the optical industry to mount lenses for grinding or polishing.

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What is this tool?

TomBoctou

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DDoug

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Limy Sami

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TomBoctou

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DDoug

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jmm03

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