Raleigh Banana
- Thread starter John Frum
- Start date
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Extract from SheldonBrowns web pages:
'Bicycles built to French or Italian standards have a normal right-hand threading for the fixed cup. The normal action of pedaling will tend to loosen a right-hand threaded fixed cup, so they have to be screwed in very, very tightly to keep them from unscrewing themselves. The fact that they are screwed in so tightly also means that it will require a lot of force to unscrew them.
Bicycles built with British or Swiss threading use a left-hand thread for the fixed cup. Since the pedaling action will tend to tighten a left threaded fixed cup, these are also likely to require a lot of force to remove.
Most American and Japanese frames of good quality use the British threading'
As its a Raleigh I'm guessing its a left hand thread, but not sure.
'Bicycles built to French or Italian standards have a normal right-hand threading for the fixed cup. The normal action of pedaling will tend to loosen a right-hand threaded fixed cup, so they have to be screwed in very, very tightly to keep them from unscrewing themselves. The fact that they are screwed in so tightly also means that it will require a lot of force to unscrew them.
Bicycles built with British or Swiss threading use a left-hand thread for the fixed cup. Since the pedaling action will tend to tighten a left threaded fixed cup, these are also likely to require a lot of force to remove.
Most American and Japanese frames of good quality use the British threading'
As its a Raleigh I'm guessing its a left hand thread, but not sure.
The side with the locking ring unscrews anti clockwise as a normal thread and the other side (drive side) unscrews clockwise, the opposite to a normal thread. Are you trying to unscrew the chainwheel (drive side) side cup? I have done an old Raleigh MTB bottom bracket this afternoon.
Hi Compo, I have removed the side with the locking ring. (mission successful) Now I am trying to remove the drive side cup. I have tried the sheldon bolt method and got nowhere, now have cut a groove across the top of it - managed to get a quarter turn out of it clockwise with a cold chisel before it stopped. So now wondering if I had been tightening it up....
The drive side cup is a left handed thread and as you have found out is is assembled TIGHT!
The best way to get it out is to find a big nut and bolt, with a head or nut big enough to just fit inside the cup. Put the nut into the cup then screw the bolt in with a long wrench and a socket. As the bolt tightens it will eventually turn the bearing cup out. I have a 3 foot lump of pipe I use and even with that it can sometimes be hard work to get the cup out.
The best way to get it out is to find a big nut and bolt, with a head or nut big enough to just fit inside the cup. Put the nut into the cup then screw the bolt in with a long wrench and a socket. As the bolt tightens it will eventually turn the bearing cup out. I have a 3 foot lump of pipe I use and even with that it can sometimes be hard work to get the cup out.
