Re: [CR]BB fixed cup tool by Bringheli

(Example: Framebuilders:Richard Moon)

Date: Wed, 15 Feb 2006 19:46:44 -0600
From: "John Thompson" <JohnThompson@new.rr.com>
Organization: The Crimson Permanent Assurance
To: classicrendezvous@bikelist.org
Subject: Re: [CR]BB fixed cup tool by Bringheli
References: <20060215193112.20408.qmail@web35508.mail.mud.yahoo.com> <43F399A4.3000406@new.rr.com> <035e01c63296$1e962f40$6401a8c0@peter5x12klm15>
In-Reply-To: <035e01c63296$1e962f40$6401a8c0@peter5x12klm15>


Pete Geurds wrote:
> I'm wondering if you guys tried this on those tough fixed cups?
> http://sheldonbrown.com/tooltips/bbcups.html
>
> Hasn't failed me yet on those old Raleigh cups.
> Can sound like a gunshot when the cup does come loose though.
> (acompanied by a quick flash of oh my gosh the frame broke!)

This is the tool I made:

http://www.os2.dhs.org/~john/bb-tool.jpg

That a piece of 5/8" all-thread, with nuts brazed on so they can't slip. Well, the nuts didn't slip, but the tool couldn't hold the cup tight enough to move it, even with an 18" wrench and a bench-mounted vise. So cut notches in a large washer to match the notches on the cup, brazed steel "teeth" into the notches to grab the cup, and brazed that on to the outer nut. But then the teeth tore out of the washer without the cup even budging.

If I had a TIG welder I'd try welding a lever directly on to the cup itself, as suggested.

--
John (john@os2.dhs.org)
Appleton WI USA