Left hand drill in automatic chuck.

dr sportster · Aug 19, 2015

I just learned something . I was extracting a broken stud from a special blind hole nut . Perfect job for lathe and left hand drill but . as the force of the lathe being in reverse acted against the chuck it would let the bit loosen due to the reverse rotation. Never thought about that happening. It worked as the broken stud started to uncrew itself But I had a heck of a time keeping the bit in the chuck tight.

TimV · Aug 19, 2015

Do you have a lathe dog? That's the old-school way of handling similar situations, and it still works.
lathe dog

Steve@Advance · Aug 19, 2015

That could be a good thing in the end... If the bit took hold of the broken stud and started backing it out, doing it in the lathe something would have to give!

dr sportster · Aug 19, 2015

I did not tighten the tailstock down so the piece of broken stud would have some " push back " space to unscrew from the workpiece. I had to hold the chuck with my hand to keep tight.

Butch(OH) · Aug 20, 2015

A very good reason to shop ebay for a nice used ball bearing Super Chuck, LOL.

dr sportster · Aug 20, 2015

I do . I buy them at sales from people that don't know what they are. LOL

Left hand drill in automatic chuck.

dr sportster

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TimV

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Steve@Advance

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dr sportster

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Butch(OH)

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dr sportster

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