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Old 06-19-2019, 11:32 AM
KamKarts KamKarts is offline
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Default Best drill bits to drill metal bolts

Any brands better then others?
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Old 06-19-2019, 12:25 PM
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Steel or stainless??? They are metal... but what kind...
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Old 06-19-2019, 12:49 PM
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Titanium tipped bits?
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Old 06-19-2019, 01:45 PM
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If you're doing a lot of drilling into metal, spend the money on M35 or M42 Cobalt high speed drill bits. They'll last a long time compared to normal high speed steel drill bits. Expensive but worth the money.
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Old 06-19-2019, 02:54 PM
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yup, for my stupid specific thread tapping bits, cobalt all day
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Old 06-19-2019, 04:33 PM
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He's got a broken bolt on a TAV--sheared the head clean off. He started this thread specifically for this issue.
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Old 06-19-2019, 07:48 PM
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Hmmm well if it's a grade 5 or less that broke off, it shouldn't be too much of a pain to use a regular high speed steel bit to drill it out. But part of the problem maybe that it doesn't drill out right and may need to be retapped.
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Old 06-20-2019, 08:56 PM
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Drill out and re tap is what I had to do.... to late for a test run... will update soon

---------- Post added at 09:48 PM ---------- Previous post was at 09:47 PM ----------

Used reg high speed bit

---------- Post added at 09:56 PM ---------- Previous post was at 09:48 PM ----------

I'd like 2 thank everyone for the ideas and info
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Old 06-25-2019, 03:52 AM
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When ever I drill metal I always use oil so that the bit cuts better. Sometimes I use plenty of it and always take time to stop and let your bit cool down a little. This helps cheap bits drill better and last longer.

I have good bits and I still do this with them. They drill better and last longer.
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Old 07-01-2019, 12:11 AM
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Get a reverse cutting bit most of the tine it will catch and screw the broke bolt out five done it quite a few 👌
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