Reply by gfadvm

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Posted on How do you identify good steel from bad in tools like drill bits

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14940 posts in 2653 days

#1 posted 12-15-2012 04:02 AM

Whiskers- Couple of thoughts on drilling steel: cutting oil is definately worth the effort and slow speed is your friend. High speed hand drills do a poor job in steel and usually wind up ruining the temper in the bit from overheating.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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