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  #1  
Old January 27th, 2019, 17:16
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Left hand drill bit, need brand recommendations?

Looking to get some left handed drill bits, any thoughts on which kind?
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  #2  
Old January 29th, 2019, 07:38
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Re: Left hand drill bit, need brand recommendations?

Maybe try the Grabit screw extractors.

https://www.amazon.com/Alden-8440P-G...abit+extractor

I have had better luck with those than with any other type. Left hand drill bit on one end, short extractor on the other end. But better luck still doesn't mean I haven't managed to break them off in the broken bolt.

Also note, I see there are a number of cheaper versions now on the market. This is one of those places where I don't think I would try to go cheaper.
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Old January 29th, 2019, 21:32
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Re: Left hand drill bit, need brand recommendations?

I have to ask why you think a left-hand drill is necessary. Can you link to any presentations about the benefits of the left-hand drill?
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Old January 31st, 2019, 20:31
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Re: Left hand drill bit, need brand recommendations?

Left hand drills are not necessary, but they can be faster.

When drilling out a busted fastener, with a standard twist drill one might need to step in 1/64 increments until they can pick out the spiral out of the threads of what's left of a fastener. A left hand drill has a tendency to walk what's left of the fastener out a bit quicker since its already biting in a direction that is to back out the fastener.
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Old February 5th, 2019, 14:44
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Re: Left hand drill bit, need brand recommendations?

As a penetrate to help with backing threads out I have come to swear by Super Slick Slick Stuff.
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Old February 13th, 2019, 15:19
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Re: Left hand drill bit, need brand recommendations?

Left hand drill bit will not do a darn bit of good on anything other than a bolt that broke due to over tightening. Once it breaks there's no pressure on the threads.

Places it WONT work...

Rusted
Crossthreaded
Bottomed out in the hole
Rounded head off
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