To make Sheldon's big bolt tool more effective make sure you use a fine thread bolt to maximize clamping force. My KingsBridge tool has 5/8" x 18 tpi threads. 18 tpi would be about 1.4mm so the best the OP will get in Germany would be 16 x 1.5mm.
The coefficient of steel on steel is quite a bit higher than steel on zinc plated steel. I suspect you could increase friction by using something like SnoBowl toilet bowl cleaner, which has hydrochloric acid, to eat the zinc plating off the bolt.
Good luck
>Sheldon "rest in tools" Brown has a pic of the home made tool on this link ...
>
>http://www.sheldonbrown.com/tooltips/bbcups.html
>
>Ciao,
>
>Ben Kamenjas
>Kensington, Australia
>
>
>On 21/06/2010, at 5:00 AM, classicrendezvous-request@bikelist.org wrote:
>
>>
>>Chuck gives good advice. The tool that I have is a Kingsbridge brand. To use
>>remove the other cup, remove the balls and old lube, insert the long side of
>>the tool into the stuck cup (there's a long enough side that sticks out past
>>the shell's other end so the tool's wrench flats can be grabbed). Then
>>depending which way the cup is threaded I clamp either side of the tool in a
>>bench vice and use my 18" crescent wrench with added leverage from a piece
>>of pipe. When you turn the frame it should produce a self tightening torque
>>on the tool. I have come across only a very few cups that I couldn't remove
>>in 35 years. Those few were ground out.
>>
>>The tool is very simple and would be easy to produce. I would be happy to
>>photo mine and send a link along.
>>
>>----- Original Message -----
>>From: "paccoastcycles" <paccoastcycles@sbcglobal.net>
>>To: "kim klakow" <Akimbo71@gmx.net>; <classicrendezvous@bikelist.org>
>>Sent: Sunday, June 20, 2010 1:02 PM
>>Subject: Re: [CR] Seized LH cup: How to?
>>
>>>Kim,
>>>
>>>If you can get the fixed cup out, there is a tool that is basically a big
>>>bolt and nut, though they are cylindrical with wrench flats on them so
>>>they're easier to use. The idea is that the two parts are screwed together
>>>with the tightening direction going in the direction you need to turn the
>>>cup. When they are hell for tight, turning the tool will naturally tighten
>>>and at the same time it will turn the cup. That is, when the gripping
>>>force of the tool is greater than the hold between the frame and cup.
>>>
>>>If that doesn't work for you, after removing the rest of the BB, you could
>>>take it to a welder and have a lever welded to the cup. The heat of a TIG
>>>or MIG would possibly help in breaking the bond between the two pieces and
>>>hopefully not burn the paint.
>>>
>>>I hope that's helpful.
>>>
>>>Chuck Hoefer
>>>Pacific Coast Cycles
>>>Oceanside, Calif
>>
>
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