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  1. #1
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    How do I remove a broken screw?

    I was wandering if anyone has some advice on how I could remove a grub screw that I snapped?
    As you may be able to see from the pics I can't get to it to file a slot into it.
    Any adive would be greatly appreciated. The bike is a GT Force 2.0 2013.
    Thank you!
    Attached Thumbnails Attached Thumbnails How do I remove a broken screw?-img_0851.jpg  

    How do I remove a broken screw?-img_0852.jpg  

    How do I remove a broken screw?-img_0854.jpg  


  2. #2
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    Go to any auto parts store and buy yourself a screw extractor. You drill a small hole in the center of the busted screw, then use this reverse-threaded tool to dig into the existing screw, grab on, and get it out.

  3. #3
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    Use a "screw extractor" as mentioned.

    Drill the hole with a left hand drill bit. Sometimes this will be enough to remove the screw.

    I would pay a professional to do it. Quality bike shop or auto mechanic or small engine mechanic etc.
    Duct tape iz like teh Force. It has a Lite side and a Dark side and it holdz the Universe together.

  4. #4
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    Quote Originally Posted by mitzikatzi View Post
    Use a "screw extractor" as mentioned.

    I would pay a professional to do it. Quality bike shop or auto mechanic or small engine mechanic etc.
    Absolutely do this. Pay a professional to remove the screw. This has the potential to be a complete pain in the azz.

  5. #5
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    Did it break when you were tightening it or when you were trying to remove?

  6. #6
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    Quote Originally Posted by mitzikatzi View Post
    Use a "screw extractor" as mentioned.

    Drill the hole with a left hand drill bit. Sometimes this will be enough to remove the screw.

    I would pay a professional to do it. Quality bike shop or auto mechanic or small engine mechanic etc.
    Gotta agree !!!
    If you're asking this question ... Paying someone else to do the removal is probably the best option.

  7. #7
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    Quote Originally Posted by Slash5 View Post
    Did it break when you were tightening it or when you were trying to remove?
    This is an important question. If the former it should be much easier to remove than if the latter.

  8. #8
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    Quote Originally Posted by evrac View Post
    This is an important question. If the former it should be much easier to remove than if the latter.
    Thanks for the advice, yeah it broke when tightening so I will take it to my LBS.

    Thanks again!

  9. #9
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    Since it broke when tightening, the broken piece might just be sitting there and not require any torque to remove.
    If you take a regular small drill bit and look carefully at the cutting edges, you can take a Dremel or other grinder and reverse the cutting edges. It doesn't have to be perfect - basically just grind the bevel on each side the other way.
    Chuck it in a drill and run in reverse. Much of the time, the friction is enough to wind the bolt out, you won't actually drill into the bolt much.

  10. #10
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    From what I gather, the broken/remaining piece of the screw is probably seized on the opposing fastener. Drill through the fastener with a slightly smaller sized drill bit and it should come right out. The remaining "ring" fastener maybe held in place by friction and can be popped out using a screwdriver.

    Word of caution, buy replacement parts before attempting.

  11. #11
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    As already mentioned, since it snapped while tightening the broken part is probably just sitting there. The first thing I'd do is use a hemostat to grab the exposed portion through the slot where it pinches together and slowly turn it out.

  12. #12
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    Quote Originally Posted by bad mechanic View Post
    As already mentioned, since it snapped while tightening the broken part is probably just sitting there. The first thing I'd do is use a hemostat to grab the exposed portion through the slot where it pinches together and slowly turn it out.
    I think the reason why it broke in the first place was because it seized.

  13. #13
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    Quote Originally Posted by baymoe View Post
    I think the reason why it broke in the first place was because it seized.
    Since it broke while tightening there's a very good chance it's not seized. Just a bolt breaks while tightening because it's over tightened, and a bolt usually breaks while loosening because it's seized.

  14. #14
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    If the bolt is lose inside maybe you get lucky..

    Ones I took a bolt out (top triple clamp) by using a piece of string, actually dental floss, I loop the string on the bolt and I just keep rotating the bolt by pulling on the string until I came out..

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