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Allis Chalmers Discussion Forum
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broken exhaust stud on head

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larry

02-26-2004 18:50:37




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was taking out stud opn wd45head on exhaust side with heat and stripped one off started with aone sixteenth drill bit which broke of in in the studs center for a perfect alingment for the easy out i cant get the drill bit out iknow you cant drill an existing drill with adrill bit any one have agood idea




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gregPA

02-27-2004 11:27:54




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 Re: broken exhaust stud on head in reply to larry , 02-26-2004 18:50:37  
hello Larry. as a machinist for about 30 years now there are a couple ways to go. if you can get access to a tap burner/EDM machine you can burn out the drill without damaging the broken stud and redrill it. if not MSC industrial supply sells carbide drills that will even drill out a broken tap. these things don't even really look like drill bits but they work. they should however be run in a rigid setup, bridgeport or drill press. fairly high rpm. carbide doesn't like to flex. it will fracture easily if not in a rigid setup. greg

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steve

02-26-2004 18:56:20




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 Re: broken exhaust stud on head in reply to larry , 02-26-2004 18:50:37  
at work the machinist have a set of concrete carbide bit drills (3/16 or 1/4 inch) they sharpen them up like a bit for steel and drill out broken bolts, etc. might try that.



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