Then he did not to be bound by science.
A finger print is 50 millionths thick, enough to cause problems when fitting spindle bearings.
A Sunnen Hone is guaranteed to hold 50 millionths.
A Romicron boring head will hold 80 millionths
A Crystal Lake Grinder can be special ordered with 5 millionths run out on its work head.
A Monarch 10EE was factory tested to hold 30 millionths on a 2" length.
Gage Blocks can be calibrated to about 2 millionths.
The crystal lake grinder is nothing short of amazing, 5 millionths, WOW! How did they do that?
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