Plastic bottom bracket

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. I messed up. I wanted to switch out the bottom bracket on my bike. When I tried to do that the toothed cup on the left side non-chain side sheared off. The entire thing is now plain with its housing. Didn't even apply that much force.

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. I have a 2 frames with FAG bottom brackets can't tell the exact model from the outside, but something like this :. I didn't have the tool so I tried turning the cups with a wrench, completely stripping off the notches and then tried to hammer as much of the plastic out with a screwdriver, but I'm not getting anywhere. One suggestion I've read is heating the spindle in the hope that the plastic can be easily removed, so I put a soldering iron into it, without much luck heat doesn't really dissipate from the spindle. I now have a proper tool that fits the notches, but it slipped during turning and partially also stripped the notches plastic vs.

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Once upon a time, all bikes were made of steel. And the bottom bracket axle was a solid steel rod. There were cups in the bearings into which loose ball bearings fitted, with the axles having a curved surface which pushed against the ball bearings. A threaded bottom bracket shell used to be the norm when bikes were made of steel.