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Moderator
Join Date: Jun 2001
Location: Geyserville, CA
Posts: 6,921
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Machinists - why are holes sometimes triangular?
I was drilling a bunch of holes in aluminum today. 7/16" or so. Sharp bit, drill press, low speed. Bit runs freely up and down when done.
Most of the holes look, well, not round. Kinda triangular. How can this be?
Just wondering....
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Don Plumley
M235i
memories: 87 911, 96 993, 13 Cayenne
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