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Farmall & IHC Tractors Discussion Board

Re: broken bolts tap an die


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Posted by mkirsch on September 17, 2014 at 05:48:08 from (72.45.143.81):

In Reply to: broken bolts tap an die posted by dewy on September 17, 2014 at 04:42:27:

No, the square easy outs just snap off in the bolt, leaving you with useless scrap metal.

Google is your friend for left handed drill bits. Just go there and type in "left handed drill bits."

If you're breaking off regular drill bits, left handed drill bits won't make any difference. You need SHARP drill bits, and you can't be reefing on the drill to force them to cut.

You need a good center punch mark to start with. Go slow and start with a small bit, work your way up size by size. It helps to have a good "calibrated eyeball" to tell if you're drilling straight. By going through every size of drill bit, you can also make corrections to the angle and direction of the hole as you go.

I had a manifold bolt snap off on my 240 back in the spring. Had the head all clamped down in the drill press and squared up and perfect center punch mark on the broken stud. Drilled a small hole with the drill press and it wandered, BAD. Fortunately by going with each size bit all the way up through I eventually managed to get the hole centered and straight again by the time I got to the threads.


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