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I'm not far off buying a CNC lathe
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the registration marks are only a guide' but if that was the case then there is no point in having the bastard things on there
Probably an expensive way to learn the lesson, but never trust subcontractors' to hold spec unless a: your contract makes them responsible for consequential loss or b: verification in house is more expensive than having it be wrong.
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So could you just use a BB the wrong way around? Can't be worse than Italian threads right? Isen factory seconds shop?
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y u no run it left hand drive?
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Shoulda just used a sensible BB standard. 386evopressfit30BB92 next time right?
PepOne
gbj_tester
umop3pisdn
hippy
Howard
@deleted
So, most annoying issue so far goes to.......... @Scilly.Suffolk s bike, or at least his neighbours who he is building it up for.
Email ytd along the lines of "building bike up, it's great and all but BB shell is back to front. Y U DO THIS?!?!?!"
For those that haven't built a frame before, if you buy pre-cut BB shells (as almost everyone does) you would be aware that there are registration marks on the BB shells to let you know what side has which thread. In 7 years of frame building these have always been correct, if you haven't now you know. Whoever was on the CNC lathe the day this BB shell was made however was not, or just wanted to piss on my parade. So, we have a BB shell with the threads cut on the wrong side of the shell. There is really nothing doing about this, but luckily we have a couple of spares in the correct size so were able to swap out, and all of the other frames seem to be fine, luckily a mechanic was putting it together and therefore didn't just jam a BB in, which would have been another thing to replace.
The interesting thing (for us) will be whether the supplier will replace the full material costs of the frame, or whether they are going to just say BB shell only. I can see them saying 'well the registration marks are only a guide' but if that was the case then there is no point in having the bastard things on there. If the latter, I think I'm not far off buying a CNC lathe. So all dark clouds etc....