Precision gage balls. By ROBRENZ. 47:25 video:
https://www.youtube.com/watch?v=fEoonCLTCbE
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Precision gage balls. By ROBRENZ. 47:25 video:
https://www.youtube.com/watch?v=fEoonCLTCbE
The diamond grit core drill grinds, the wood not only supports the sphere, imparts lapping action as well. Even green buffing compound charged wood dowel spun in a die grinder will polish steel grooves, like stacking lugs of a injection mold core for a cup, or reliefs on a revolver cylinder.
What is the wheel in the grinder?
Ralph