[DeTomaso] Galled stainless fasteners

Rob Dumoulin rob at dumoulins.net
Thu May 27 10:05:14 EDT 2010


Welcome back, Jon.

On Wed, May 26, 2010 at 9:30 PM, Haas, John <john at haasline.com> wrote:

> 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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-- 
Rob DuMoulin
904.476.8744
rob at dumoulins.net



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