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Drill Bit Longevity

#4
I think I know what he means. As the tip starts losing carbide the drill gets dull and goes slower. One bit I had once I thought was okay even though it just had a little carbide left, and I started drilling and it was really slow. I put everything I had on the drill and when I finally gave up and pulled it out of the hole the end was just a smooth ball of melted steel. LOL.

I must have hit rebar or something. We used to drill hundreds of rebar pins into concrete cold joints.
JD Grafton
Concrete Answers for Flooring Problems
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Messages In This Thread
Drill Bit Longevity - Ernesto - 10-15-2011, 10:42 AM
RE: Drill Bit Longevity - CC Solutions - 10-16-2011, 05:57 PM
RE: Drill Bit Longevity - eaadams - 10-17-2011, 01:01 AM
RE: Drill Bit Longevity - CC Solutions - 10-17-2011, 05:55 AM
RE: Drill Bit Longevity - CCR - 06-19-2012, 03:39 AM
RE: Drill Bit Longevity - CC Solutions - 06-19-2012, 06:35 AM
RE: Drill Bit Longevity - CCR - 06-19-2012, 05:57 PM
RE: Drill Bit Longevity - CC Solutions - 06-19-2012, 07:30 PM
RE: Drill Bit Longevity - CCR - 06-20-2012, 03:12 AM
RE: Drill Bit Longevity - CC Solutions - 06-20-2012, 06:36 AM
RE: Drill Bit Longevity - CCR - 06-20-2012, 12:15 PM
RE: Drill Bit Longevity - CC Solutions - 06-20-2012, 03:04 PM
RE: Drill Bit Longevity - CCR - 04-10-2013, 07:07 PM

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