Bottom bracket ovalization

[Janosch]

Show off your shop-made/DIY Tools!

I am retrofitting a frame with a PF30 BB shell. Problem: Can’t drill out the old one in one go because my hole saws will only cut halfway. Would be an awful headache trying to jig the frame on our small mill twice. Solution: Magnum hole saw [20241201_150512] [20241201_142445] [20241201_145518] I haven’t tried it yet and there is a real chance that the hardened steel will rip at the welds. But who knows, it might even work!

in this thread they talked about replacing the bb…? may this is a option?