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 Post subject: Stuck BB cup
PostPosted: Fri Aug 03, 2012 8:18 pm 
Old School Hero
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Joined: Tue Oct 13, 2009 3:08 pm
Posts: 240
I've been overhauling an Italian frame and the non-drive BB cup won't budge. I've snapped the pins off my two pin BB spanner and tried the Sheldon Brown Nut'N'Bolt method with no luck. The BB is an OMAS "Big Sliding" with a Ti axle and cartridge bearings. I'm not sure if it is corroded or a thread locking compund has been used on assembly. Is there a beefier BB tool with 8 pins out there or does the house have any other methods I could try ? I've pictured some of the bits below, both cups are the same with a lock ring each side.


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 Post subject: Stuck
PostPosted: Fri Aug 03, 2012 9:33 pm 
rBoTM Winner
rBoTM Winner
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Joined: Mon Aug 08, 2011 5:58 pm
Posts: 162
Location: Scotland
Is it time to clamp the exposed threads of the cup in the biggest bench vice you can and use the frame as a lever?

Good luck!


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 Post subject:
PostPosted: Fri Aug 03, 2012 9:40 pm 
rBoTM Winner
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Joined: Tue Mar 27, 2012 9:28 pm
Posts: 3104
Location: Mansfield Woodhouse, Nott's.
Ask yourself do you really need to remove the cup ? and wreck it in the process :(

Are you replacing the old BB set with a new BB set ? If not just leave it in place.

I've got a seized in cup on my Raleigh, am i bothered about it ? Nope and its still good after 25 years.


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 Post subject:
PostPosted: Sat Aug 04, 2012 1:14 am 
Road Moderator
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Joined: Thu Jun 18, 2009 1:07 pm
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Location: Sheppey, Kent
Just to be sure you do know that Italian thread bb fixed cup unscrews anti-clockwise don't you? (as opposed to clockwise for English thread)


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 Post subject:
PostPosted: Sat Aug 04, 2012 11:28 am 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8247
Location: Cumbria
edit..


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 Post subject:
PostPosted: Sat Aug 04, 2012 8:25 pm 
Retro Guru

Joined: Mon Feb 01, 2010 8:57 pm
Posts: 774
Depends on whether you want to save the BB cup or not. Destructive methods include welding a big bolt to the cup for extra purchase or using an angle grinder to cut a slot across the face of the cup and smashing it out with a cold chisel.


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