Cross threaded BB shell - HELP!

ratsbeyfus
ratsbeyfus Posts: 2,841
edited May 2013 in Workshop
Hi

I've managed to cross-thread the BB shell on a brand new track frame when trying to install the BB. :oops: My LBS says that they will try and tap out the threads, but can't do it 'til next Thursday... meanwhile I have an anxious wait.

Anyone else experience this? If LBS isn't successful are there other alternatives, or will frame be scrap? :cry:

Any help/advice/reassurances much appreciated.


I had one of them red bikes but I don't any more. Sad face.

@ratsbey

Comments

  • freezing77
    freezing77 Posts: 731
    ratsbeyfus wrote:
    Hi

    I've managed to cross-thread the BB shell on a brand new track frame when trying to install the BB. :oops: My LBS says that they will try and tap out the threads, but can't do it 'til next Thursday... meanwhile I have an anxious wait.

    Anyone else experience this? If LBS isn't successful are there other alternatives, or will frame be scrap? :cry:

    Any help/advice/reassurances much appreciated.

    It could possibly be bored out and re-sleeved, expensive and not always possible.

    Alternatively a threadless bottom bracket.
    http://www.sjscycles.co.uk/prestine-threadless-68mm-sealed-bearing-bottom-bracket-for-frames-with-damaged-threads-prod16505/
    prestine-threadless-68mm-sealed-bearing-bottom-bracket-for-frames-with-damaged-threads-IMG16505.jpg
  • proto
    proto Posts: 1,483
    It depends on how much damage you did when you forced the BB cup in, but I doubt it was very far, and you've probably only damaged the first couple of turns of thread. If they tap it out there is a very good chance that all will be fine.
  • nicklouse
    nicklouse Posts: 50,673
    ratsbeyfus wrote:

    Any help/advice/reassurances much appreciated.
    wait till Tuesday.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • ratsbeyfus
    ratsbeyfus Posts: 2,841
    Thanks for replies - I particularly like the look of the threadless BB as a fix if the worse comes to worse. Anyone have experience of them?


    I had one of them red bikes but I don't any more. Sad face.

    @ratsbey
  • pilot_pete
    pilot_pete Posts: 2,120
    nicklouse wrote:
    ratsbeyfus wrote:

    Any help/advice/reassurances much appreciated.
    wait till Tuesday.
    why? What's happening on Tuesday? :wink:

    PP
  • cpeachey
    cpeachey Posts: 1,057
    It is sometimes possible to "repair" a damaged thread with a small screwdriver. Look to see where the thread is damaged and use the screwdriver to push the thread back in line. When it looks good fit an old steel cup in and out a few times with some grease on to smooth the thread.
    It's useually the cups that get cross threaded and not the shell (on steel frames)
    Chris
  • ratsbeyfus
    ratsbeyfus Posts: 2,841
    Thanks CPeachy... my frame is aluminium so perhaps the threads in aluminium shells are softer. Will wait to see what lbs do before going near it with any tools again.


    I had one of them red bikes but I don't any more. Sad face.

    @ratsbey