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How to remove stripped bottle cage bolt

Old 05-19-13, 02:36 AM
  #1  
CanadianBiker32
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How to remove stripped bottle cage bolt

On road bike. I have a bottle cage bolt that is stuck. The head of the screw is rounded out. So hard to use allen key to remove the screw.
What methods or tool can i use safely to remove the screw?
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Old 05-19-13, 03:35 AM
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AlphaV
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Visegrips. If that doesn't work, you can drill it out.
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Old 05-19-13, 04:32 AM
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If you have a torx set that has a bit that fits well sometimes that will get grip on the head. It has worked for me
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Old 05-19-13, 04:43 AM
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I'd shoot it with pc blaster a couple of times for a day or two, then use the vise grips. Go easily at first because you can snap off the head or strip out the fitting if things are really rusted. I also worked the "bolt" back and forth a bit to help break the rust adhesion before applying any serious pressure. Worked for me and nothing snapped off or stripped out. I also have one of those cheap pencil point butane torches for really stubborn nuts/bolts that if used judiciously won't harm the surrounding paint.

Last edited by okane; 05-19-13 at 04:52 AM.
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Old 05-19-13, 05:16 AM
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Hi,

You can hacksaw a slot into it and use a screwdriver.

rgds, sreten.
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Old 05-19-13, 06:12 AM
  #6  
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Besides the above suggestions you could epoxy a sacrificial hex driver into the rounded-out socket.
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Old 05-19-13, 08:23 AM
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Originally Posted by sreten View Post
You can hacksaw a slot into it and use a screwdriver.
I've done the same, but used a Dremel to cut a slot in the bolt head.
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Old 05-21-13, 10:56 AM
  #8  
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Originally Posted by sreten View Post
Hi,

You can hacksaw a slot into it and use a screwdriver.

rgds, sreten.

i like it! slight addition- if it is too tight to unscrew by hand, use a square-shafted
screwdriver (turner) and a small adjustable wrench for torque and grip.
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Old 06-26-15, 10:14 AM
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Had this problem this week. The screw was seized hard. I dremeled a slot for a flathead screw driver and used an impact driver to hammer the screw out. Took about 15 minutes of hammering.
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Old 06-26-15, 10:40 AM
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Originally Posted by CanadianBiker32 View Post
On road bike. I have a bottle cage bolt that is stuck. The head of the screw is rounded out. So hard to use allen key to remove the screw.
What methods or tool can i use safely to remove the screw?
1. Vise grips. That might work with a socket-head cap screw, but is out for pan-head fasteners.

2. Grabit screw extractor (drill on the right end, extractor on the left). They take less drilling than conventional fluted or spiral extractors, and are much less likely to break



3. Left-handed drill bit to remove the head. Hopefully it will spin-out. Fall back to a smaller bit and screw extractor if it does not.
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Last edited by Drew Eckhardt; 06-26-15 at 10:43 AM.
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Old 06-26-15, 09:04 PM
  #11  
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Jackhammer
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Old 06-26-15, 09:39 PM
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Try heat in conjunction with penetrating oil, a blow dryer or better yet its industrial equivalent. Then put vise grips on the bolt head and tap the the vise grips with a hammer because shock is also useful.
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Old 06-26-15, 10:57 PM
  #13  
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Originally Posted by SlowJoeCrow View Post
Try heat in conjunction with penetrating oil, a blow dryer or better yet its industrial equivalent. Then put vise grips on the bolt head and tap the the vise grips with a hammer because shock is also useful.
heat will mess up the paint on the frame
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Old 06-26-15, 11:13 PM
  #14  
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Originally Posted by sreten View Post
Hi,

You can hacksaw a slot into it and use a screwdriver.

rgds, sreten.
Originally Posted by SkyDog75 View Post
I've done the same, but used a Dremel to cut a slot in the bolt head.
This.
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Old 06-29-15, 11:26 AM
  #15  
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Originally Posted by howeeee View Post
heat will mess up the paint on the frame
Hot air will not affect the paint job, just don't use a very high temperature or an open flame. The object is to produce a little bit of thermal expansion and help the penetrating oil to flow.
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Old 06-29-15, 02:21 PM
  #16  
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careful you don't release the rivet nut from the frame, this happened to me recently
but if you do... do not despair...plently of youtube videos to show you how to fix that too

the second bolt was just as tight, but i learnt to use a penetrating releasing agent, and the rivet nut was fine on that one.

Last edited by le mans; 06-29-15 at 02:26 PM.
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Old 06-29-15, 03:59 PM
  #17  
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Originally Posted by Drew Eckhardt View Post
1. Vise grips. That might work with a socket-head cap screw, but is out for pan-head fasteners.
Even pan heads have an edge, and if you are careful you can grab it with Vise-Grips, especially the smaller size tools...
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Old 06-29-15, 04:19 PM
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I had one very badly stripped bolt on one of my cantilever brake bosses, the head was very rounded. I'd been looking into ways of dealing with that and was about to give the dremel & screwdriver option a try. However, then I read somewhere that using a brand new allen key could sometimes do the trick. So I took my bike to the LBS and the mechanic there pulled out some Park Tools allen key (made of industrial grade steel), and after shoving it into the head as much as possible, he was able to unscrew that bolt. Looking at the rounded head, I'm still not sure how he managed to pull it off, but the fact is, that bolt came out. So just saying, might want to start with something simpler first and then move on to the more aggressive treatments that have been suggested here already.
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Old 06-29-15, 04:35 PM
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BTW, if the screw is holding a water bottle cage in place just remove the other screw and rotate the cage CCW; that alone might loosen the screw enough...
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Old 06-29-15, 04:37 PM
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Originally Posted by vatdim View Post
I had one very badly stripped bolt on one of my cantilever brake bosses, the head was very rounded. I'd been looking into ways of dealing with that and was about to give the dremel & screwdriver option a try. However, then I read somewhere that using a brand new allen key could sometimes do the trick. So I took my bike to the LBS and the mechanic there pulled out some Park Tools allen key (made of industrial grade steel), and after shoving it into the head as much as possible, he was able to unscrew that bolt. Looking at the rounded head, I'm still not sure how he managed to pull it off, but the fact is, that bolt came out. So just saying, might want to start with something simpler first and then move on to the more aggressive treatments that have been suggested here already.
Often cheaper tools lose those nice, sharp edges, enough so that they will slip whereas a quality one will not...
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