Stripped and stuck 5mm stem bolt- Mtbr.com
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  1. #1
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    Stripped and stuck 5mm stem bolt

    This 5mm stem bolt got over torqued and then stripped when trying to remove. I have tried EVERYTHING and nothing is even making it budge, if anything itís just rounding out the hole even more. What are my options here?




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  2. #2
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    Screw extractor. Try Grabits. They chuck into an impact/drill, but you absolutely shouldn't use them like that. Get them in, then use a bit ratchet/etc, to unscrew it.

  3. #3
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    8nm seems really high for a stem. Any normal screw extractor will work, just normal bolt extraction procedures. They're available at any hardware store, and they're fairly affordable.

    https://www.homedepot.com/p/Vermont-...1829/202850653

    I like that style. The ryobi ones are especially poor quality if you're going to home depot, so skip those.

  4. #4
    Rollin 29s
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    For small shallow holes, this style works best. I have sets of both types as well as left hand drill bits. With a combination of liquid wrench soaking, LH drill over sizing the hole (which will sometimes back out the bolt), and a multi spline extractor, you will get it out. Chances are you will not remove it with a standard screw extractor.




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  5. #5
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    Extractors can/may work and are certainly worth a try. Drilling the head out is pretty straightforward too, and will def work.
    Do the math.

  6. #6
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    I've had some success with tapping in a torx wrench if it's not too bad. Otherwise, they got you pretty well sorted.
    :nono: :thumbsup:

  7. #7
    Rollin 29s
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    Drilling the head will release clamp pressure, but if you want to save the stem, you still have to get the threaded part of the bolt out. If you donít care about the stem, this is the quickest method.


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  8. #8
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    Also, you can try tightening the other bolt a bit (make sure you don't strip it too!) and see if that relieves the pressure on the stripped one enough to get it out with the normal hex tool. I assume when it happened you were alternating between each bolt as you undid them. This doesn't matter for this situation, but may save you (or others) in the future.

    Tim

  9. #9
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    Take a Torx wrench to it. It will grab the very tight corners.

    That said, Raceface needs to change that torque spec. I bought an Aeffect stem also and tightened it to spec (85in/lbs). A year later I adjusted the height and reinstalled it. Switching back and forth between the two bolts, the bottom one started getting easy to tighten... The aluminum threads in the stem had stripped. I used a helicoil to fix it, but I went back to my OE stem and never reused the RF one. IMHO, the torque spec is WAY TOO HIGH. Most other stems are around 5nm / 45in/lbs.

    Ttyl, Fahn
    Hubbard Bike Club

  10. #10
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    Jb weld on the end of Allen key cured 24 hours works pretty darn well
    83 Ritchey Everest
    95 Bianchi Mega Tube ti
    2015 Kona Operator Supreme
    2015 Kona Process 153
    2019 Kona Process 153 CR 29

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