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Partially stripped crank thread

Started by Portable Splat Graphics ยท ยท Last activity ยท 6 posts ยท 815 views

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Mountain Bikes
Published
24 August 2004
Last activity
26 August 2004
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Portable Splat Graphics
Posts
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  1. If you are careful and you know what your doing use a Tap and die set.
    * http://www2.northerntool.com/product/34565/ *
    Yea I said it, "tap and die"! ๐Ÿ™‚ long live funk ๐Ÿ™‚

    CS

    "D T W .../\..." <[email hidden]> wrote in message
    news:89RWc.12209$IO1.7533@trndny03...

    Quoted message said:


    "Westie" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Bought the beater home after lending it to a friend. Took his platforms
    off. Didn't find my clipless until I was about to put the bike into the


    car

    Quoted message said:

    so just hand-threaded the pedals in a few turns so I wouldn't loose them


    on

    Quoted message said:

    the way home. Got back at home and one of the kids jumped on it before


    I'd

    Quoted message said:

    tightened the pedals. They hit the gas and the pedal snapped out of the
    crank arm, ricocheting across the pavement, taking about 2 or 3 turns of


    the

    Quoted message said:

    crankarm thread with it. The torn thread was like a thin alloy spring
    coiled around the threads of the pedal.

    I think there is enough thread remaining so that the pedal would screw


    in

    Quoted message said:

    to

    Quoted message said:

    the crank arm securely . I was wondering if any one had an good ideas
    before I start forcing bolts into partially stripped holes? I'd rather


    not

    Quoted message said:

    have to buy a new crankset. It's a Raceface Prodigy XC crankset.
    --
    Westie
    (Replace 'invalid' with 'yahoo' when replying.)

    It sounds like you have enough good thread to function. The pedals I've
    looked at have 7 threads over their length, leaving you 4 good threads?


    I'd

    Quoted message said:

    try to screw the pedal in from the back side to see if you can clean out


    any

    Quoted message said:

    damaged thread, although it probably won't reach thru. If you can start


    it

    Quoted message said:

    from the front side without cross threading it you should be fine. If an
    LBS is handy they may have a tap to clean up the thread. This all


    assumes

    Quoted message said:

    that your not some freeriding monster that breaks frames every other week
    ;-) If you've broken cranks in the past it's probably not a good idea to
    trust it. YMMV.

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest I've just wasted.

  2. Bought the beater home after lending it to a friend. Took his platforms
    off. Didn't find my clipless until I was about to put the bike into the car
    so just hand-threaded the pedals in a few turns so I wouldn't loose them on
    the way home. Got back at home and one of the kids jumped on it before I'd
    tightened the pedals. They hit the gas and the pedal snapped out of the
    crank arm, ricocheting across the pavement, taking about 2 or 3 turns of the
    crankarm thread with it. The torn thread was like a thin alloy spring
    coiled around the threads of the pedal.

    I think there is enough thread remaining so that the pedal would screw in to
    the crank arm securely . I was wondering if any one had an good ideas
    before I start forcing bolts into partially stripped holes? I'd rather not
    have to buy a new crankset. It's a Raceface Prodigy XC crankset.
    --
    Westie
    (Replace 'invalid' with 'yahoo' when replying.)

  3. "Westie" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Bought the beater home after lending it to a friend. Took his platforms
    off. Didn't find my clipless until I was about to put the bike into the


    car

    Quoted message said:

    so just hand-threaded the pedals in a few turns so I wouldn't loose them


    on

    Quoted message said:

    the way home. Got back at home and one of the kids jumped on it before


    I'd

    Quoted message said:

    tightened the pedals. They hit the gas and the pedal snapped out of the
    crank arm, ricocheting across the pavement, taking about 2 or 3 turns of


    the

    Quoted message said:

    crankarm thread with it. The torn thread was like a thin alloy spring
    coiled around the threads of the pedal.

    I think there is enough thread remaining so that the pedal would screw in


    to

    Quoted message said:

    the crank arm securely . I was wondering if any one had an good ideas
    before I start forcing bolts into partially stripped holes? I'd rather


    not

    Quoted message said:

    have to buy a new crankset. It's a Raceface Prodigy XC crankset.
    --
    Westie
    (Replace 'invalid' with 'yahoo' when replying.)

    It sounds like you have enough good thread to function. The pedals I've
    looked at have 7 threads over their length, leaving you 4 good threads? I'd
    try to screw the pedal in from the back side to see if you can clean out any
    damaged thread, although it probably won't reach thru. If you can start it
    from the front side without cross threading it you should be fine. If an
    LBS is handy they may have a tap to clean up the thread. This all assumes
    that your not some freeriding monster that breaks frames every other week
    ;-) If you've broken cranks in the past it's probably not a good idea to
    trust it. YMMV.

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest I've just wasted.

  4. "Portable Splat Graphics" <splatgraphics@(NOSPAM)sympatico.ca> wrote in message news:<[email hidden]>...

    Quoted message said:

    If you are careful and you know what your doing use a Tap and die set.
    * http://www2.northerntool.com/product/34565/ *
    Yea I said it, "tap and die"! ๐Ÿ™‚ long live funk ๐Ÿ™‚

    CS

    I doubt that kit has a 9/16 x 20 L or a 9/16 x 20 R. They are pretty
    much [censored] threads of the bicycle industry.

    R

  5. "Westie" <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    Bought the beater home after lending it to a friend. Took his platforms
    off. Didn't find my clipless until I was about to put the bike into the car
    so just hand-threaded the pedals in a few turns so I wouldn't loose them on
    the way home. Got back at home and one of the kids jumped on it before I'd
    tightened the pedals. They hit the gas and the pedal snapped out of the
    crank arm, ricocheting across the pavement, taking about 2 or 3 turns of the
    crankarm thread with it. The torn thread was like a thin alloy spring
    coiled around the threads of the pedal.

    Try running the pedal in from the back side of the crankarm, in order
    to clean out the threads. If there is a enough material left, you'll
    know it when you really lay into the pedal with a long pedal wrench.

    Quoted message said:

    I think there is enough thread remaining so that the pedal would screw in to
    the crank arm securely . I was wondering if any one had an good ideas
    before I start forcing bolts into partially stripped holes? I'd rather not
    have to buy a new crankset. It's a Raceface Prodigy XC crankset.

    Eldi makes a threadsert (solid threaded insert) specifically for
    replacing the 9/16 x 20 threads in a stripped arm. You can check
    places like biketoolsetc.com or check with your local LBS ... if there
    any good they'll have the kit. It's a ~20.00 job at the LBS here.

    R

  6. OK, thanks guys. I'll give that threading from the back a go.
    --
    Westie
    (Replace 'invalid' with 'yahoo' when replying.)

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