Wits end removing the last screw on chainring
#1
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Wits end removing the last screw on chainring
Hello,
I have 5 year old bike that I'm learning to service, I'm removing the chainring and have removed the 4/5 hex keys with the chainring wrench but the last nut simply won't unscrew however tight I hold the wrench it simply rotates over it
Any idea how else I can remove it? Any help is appreciated
I have 5 year old bike that I'm learning to service, I'm removing the chainring and have removed the 4/5 hex keys with the chainring wrench but the last nut simply won't unscrew however tight I hold the wrench it simply rotates over it
Any idea how else I can remove it? Any help is appreciated
#2
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I would lay it flat drive side down, add penetrating oil, and let it soak a day or two. If the chain has that much rust then the chain ring bolt might have rust too.
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#3
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Here is a gif https://gifyu.com/image/u1VY
#5
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Try the above. Also, I have had good luck with an electric impact wrench. My last stuck chainring bolt I had to drill out. Not too bad of a job. Replacements are not too expensive.
#6
mechanically sound
However you get them out, I’d advise replacing them with truvativ chainring bolts, which use hex holes on both sides.
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The VAR-35200 is designed for this type of chore. Unfortunately, it's not cheap, but perhaps a local bike shop has one and can remove the bolt for you? Make sure the bolt threads are lubricated to reduce the chances of this happening again.
#8
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It looks like that tool is designed primarily for tightening chainring bolts, not loosening them. As soon as you begin to loosen the bolt, it will lose its grip on the nut, and allow it to spin in the chainring it the bolt is seized up inside the nut.
#9
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Not the best picture if you're trying to sell em!
Barry
#10
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Hard to tell from the picture, but I can see your point and how it would work. Still, I doubt that the spring would provide sufficient clamping force on the nut to keep it from spinning if it was seized on the bolt.
#11
Your cog is slipping.
https://www.vartools.com/en/combined...s-var-p828.php
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It both loosens and tightens. I have one of the newer versions and use it all the time at the shop. I don't think it would do much on a bolt that's really stuck though.
https://www.vartools.com/en/combined...s-var-p828.php
https://www.vartools.com/en/combined...s-var-p828.php
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Last edited by TejanoTrackie; 06-26-20 at 07:24 PM.
#13
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A drill, bolt extractor tool and hammer.
I have a Craftsman set, not expensive; instructions on the tool sleeve. Drill, hammer in the tap and unscrew with box wrench around the tap.
I have a Craftsman set, not expensive; instructions on the tool sleeve. Drill, hammer in the tap and unscrew with box wrench around the tap.
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That won’t work in this case. The problem is not that the bolt socket is stripped, but rather that the nut is spinning in the chainring as the bolt is turned. What is needed is something to keep the nut from moving as the bolt is turned.
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#15
Your cog is slipping.
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#16
Your cog is slipping.
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Unless you have a means to secure the slotted nut to prevent it from spinning (precisely the OP's problem), there's no way to drill it out; the whole assembly will just spin.
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If you hold the outside with an allen wrench, you can drill the inside. Big enough bit to do the job but not touch the crank spider or chain rings. If you're good with a vise grip you may want to give that a try first.
#21
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When I drilled mine out 2 weeks ago I used the little wrench tool on the back and drilled out the hex side. The worn nubs still had enough grip to let me drill the bolt out. Not too bad a job. The bolt poped out with no damage to the crank arm.
Ride Safe,
Joe
Ride Safe,
Joe
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#23
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Thanks for the suggestion, I even went to my local bike ship and they said he couldn't remove it either. Either way I'm looking to upgrade from the stock chainring so I suppose it's the time now
#24
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Thanks everyone for the reply, I will try drilling it out or perhaps replace the 5 year old stock chainring
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