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06-09-2019, 08:47 PM | #1 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,608
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Re: question about metal for machinists
Cutting oil both cools and lubricates...its either 1 of 2 or both things...the bit is dull or the bolt could be surface hardened...meaning you drilled out the softer center and have hit the hard surface...
I've had issues drilling some bolts...and case hardened is usually the reason...
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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