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Damaged bottom bracket shell

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  • 31-08-2016 9:51pm
    #1
    boomdocker
    Registered Users Posts: 2,015 ✭✭✭


    Threads on the frame seem slightly damaged
    So every time I try to thread a (Hollowtech) bottom bracket cup in seems like it damages the threads, so after a few weeks just works its way out

    So seems what I need is a screw-together-in-the -middle bottom bracket. I've seen ones that are for square taper cranksets - don;t really want to go back to them

    So my question is - it possible to get a Hollowtech type bottom bracket that screws together in the middle?


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    #2
    JBokeh
    Registered Users Posts: 469 ✭✭JBokeh


    If the threads aren't too badly chowdered you may be able to get them repaired by a bike shop with a BB threading and facing tool, it usually works really well on all but the most damaged BB shells.


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    #3
    clog
    Registered Users Posts: 1,100 ✭✭✭clog


    JBokeh wrote: »
    If the threads aren't too badly chowdered you may be able to get them repaired by a bike shop with a BB threading and facing tool, it usually works really well on all but the most damaged BB shells.

    ^^^This,

    Some threadlock should also help.


  • Options
    #4
    ford2600
    Closed Accounts Posts: 4,457 ✭✭✭ford2600


    Had a similar problem to OP (but threads within 10mm of drive side bb shell were completely destroyed and beyond rethreading) and was just about to use 3M DB420 to epoxy in a BB; HT 2 tend to fail on non drive side much more frequently and planned threading in that cup, leaving me with some chance of servicing it.

    Then I found this.
    http://www.chainreactioncycles.com/ie/en/shimano-saint-bb80-hollowtech-ii-bottom-bracket/rp-prod38345

    Longer threads on ds, allowing me to grip inside undamaged threads. Fitted last night and thread locked so might work. If not it's epoxy time!!

    My frame isn't expensive, not sure I could epoxy a nice frame


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