Thread: Bottom bracket threading, explain it to me.
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Old 06-22-25 | 06:36 AM
  #46  
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JohnDThompson
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Originally Posted by Duragrouch
For both the cups and the shell? I know of engineering applications where one part had slightly (IIRC, 5%) different thread pitch in order to be self-locking.
Yes, both the cups and the shell. Not to mention, the Whitworth thread angle and profile used with Italian thread spec.

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