Best drill bits to drill metal bolts

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Kartorbust

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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.
 

Kartorbust

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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.
 

KamKarts

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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
 

pearl111

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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.
 

Neal collins

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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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