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 Post subject: Re: bottom bracket
PostPosted: Sun Jul 18, 2010 6:15 pm 
Retro Guru

Joined: Sun Dec 14, 2008 2:11 pm
Posts: 303
orbeas wrote:
Heat is the only way with some bottom brackets.

just had to remove 2 bottom brackets from a Rossin and a Guerchotti

and they would not have come out without the oxy/act torch.

especially with alloy bottom brackets as the alloy reacts with the steel and they weld themselves together.

also without heat to expand the threads outwards there is a chance that the alloy cup will rip the threads off the bottom bracket.



I wouldn't go taking a gas axe to a brazed frame if I were you.


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 Post subject: botom bracket
PostPosted: Sun Jul 18, 2010 7:14 pm 
Retro Guru

Joined: Wed Nov 04, 2009 9:57 pm
Posts: 641
Sorry but have been doing it for over 30 years

you just need to know how much heat to use

and have never had a problem

must have done over 100 in all those years

and more in seat posts.

use a number 1 tip and 5 lbs pressure in Acetaline and the same in Oxygen.


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 Post subject:
PostPosted: Sun Jul 18, 2010 7:54 pm 
Retro Guru

Joined: Sun Dec 14, 2008 2:11 pm
Posts: 303
Each to his own.

I recall one bloke telling me how it was fine using his gas axe to free a seized brake pedal pivot bolt. He'd been doing that sort of thing for decades. Then he went straight on at the mere hairpin. Luckily there's plenty of run off there, but the hay bales made a mess of his nose cone.


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