[Fot] Recalcentrant Bolt!!!

[Mark Eginton]

Yes I had a broken tap removed from an aluminum Vintage Harley head without
destroying the aluminum threads using EDM. Its amazing but the peice must fit
in the machine, usually bathed in dielectric liquid. Mostly used for making
plastic molds with machined carbon electrodes...

THanks for all the advice; I am soaking the bolt all week with penetrating
oil - cannot find Kroil but using something else. It is actually a bolt (I'm
pretty sure), the one that the hand crank engages.

This weekend I plan to pull the pan (gotta do it anyway), use a 2x4 to lock
the crank and I plan a WWF smackdown - wish me luck...

M

________________________________

From: Bill Babcock [mailto:billb at bnj.com]
Sent: Mon 3/26/2007 12:30 PM
To: SHANE Ingate
Cc: Mark Eginton; fot at autox.team.net
Subject: Re: [Fot] Recalcentrant Bolt!!!


It would be a pretty big or specialized shop to have EDM stuff. It's a nut.
It will come off. If worse comes to worst, use a chisel against the edge of
the flats. It helps if you make a nick with a sharp chisel and then use a
dull one to apply torque. Big Big F*&%$ing Hammer (BBFH) and a bit of
technique. Just be sure you're loosening the nut, not tightening it.

Bill Babcock
billb at bnj.com <mailto:billb at bnj.com>
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On Mar 26, 2007, at 4:01 AM, SHANE Ingate wrote:


	Mark,

	I've seen some sort of "electrical disintegration" process that
	was used to disintegrate an outer bearing shell in my Guzzi
	gearbox.  Sorry, I don't know the correct terminology or
	even how it works, but it is something that only a shop would
	have.  Maybe others on the list could help and indicate
	whether it would work for you.

	Shane Ingate in Maryland


	Mark Eginton wrote:


		I hate being beaten by equipment but here I am having tried
everything
		short
		of a cutting torch to break lose that @$%*ing crank bolt
where behind the
		fan
		on an old TR2 engine. Tried pneumatic and hammer impacts,
sweet talking and
		big mallets having laid waste to one wrench and one socket
(gotta love
		craftsman replacement policy) and now I have moved on to
fermented beverage
		before I indulge in a monster frustration tantrum guaranteed
for short term
		satiation and long term expensive grief.

		Help!!!

		M


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