Thread: New (to me) Swatys

11-13-2014, 12:38 AM #15
rolodave

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Originally Posted by tintin

i was told by an old machinist that granite inspection plates were made completely flat by rubbing two together. i guess they cancel out each others imperfections. not sure if it was true or not.

This is true.

"Optical Flats" used in laser work are made by rubbing two like stones. The result is a perfectly flat surface.
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The Following 2 Users Say Thank You to rolodave For This Useful Post:

Hirlau (11-13-2014), tintin (11-13-2014)