[DeTomaso] Galled stainless fasteners
Haas, John
john at haasline.com
Wed May 26 21:30:42 EDT 2010
If you do drill, try to use a split point drill and coolant to avoid cold
working the bolt while drilling. My local ACE (on the Gulf coast) stocks
ASTM F593 stainless fasteners which have good material properties given the
cold rolling requirements. Still, always use never seize. If you come across
A286 aerospace surplus stuff it's fantastic, just like the value of a good
ol' grade 5 fastener...
Nice to be back on the list after a 10 year hiatus!, John Haas
-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of JDeRyke at aol.com
Sent: Wednesday, May 26, 2010 1:02 PM
To: davel at emspace.com; detomaso at realbig.com
Subject: Re: [DeTomaso] Galled stainless fasteners
ARP make strength-graded stainless fasteners. Harley-Davidson-suppliers
make shiny, grade-nothing bolts. You are SOL unless you absolutely use
anti-sieze every single time. Personally, I would deposit all those bolts in
a
landfill, and I'd look very closely at the pulleys too- if they came from
the
same source.
Stainless brazes beautifully. You MAY be able to braze a long allen wrench
to the ratted-out hex, then using a Vice-grip on the outside of the head and
using both the allen and the Vice-grip, maybe tear the threads out and
re-tap. The brazing heat might help, or might not. If the head is that soft,
most likely, drilling will be your best option. And if you do, use lube on
the
drill: stainless- even Chinese stainless- doesn't drill well either. Harbor
Freight and Manhatten Supply have some stud-extractors that might fit,
depending on where the bolt is. Good luck- J DeRyke
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