Part stuck in crank
08-08-09, 08:29 PM
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Part stuck in crank
First off, I think this is better here than in bicycle mechanics as I seldom get a good answer there. Well not seldom, but not as often as here.
Okay so a guy came into the shop to get a Sram Rival Crankset put on. He gave me the old gossamer crankset. It was gonna be thrown out. Half of a bolt is screwed into the non drive side part of the crankset, the part the crank arm bolts on to. The hollow tube that sticks out of the crank. Yeah and I think I can get it out, and if I can, then I have a good crankset. Anyone know how to do this?
Okay so a guy came into the shop to get a Sram Rival Crankset put on. He gave me the old gossamer crankset. It was gonna be thrown out. Half of a bolt is screwed into the non drive side part of the crankset, the part the crank arm bolts on to. The hollow tube that sticks out of the crank. Yeah and I think I can get it out, and if I can, then I have a good crankset. Anyone know how to do this?
08-08-09, 08:33 PM
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Pics?
08-08-09, 08:37 PM
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08-08-09, 08:42 PM
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Bicycle Repair Man !!!
So you work in a shop and don't think you can get a good answer in the mechanic's forum and can't figure this out for yourself ?
Post a pic in the mechanics's forum.
Post a pic in the mechanics's forum.
08-08-09, 08:45 PM
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Well it's not as much of a bike question as it is a general mechanic question. I am quite sure there is not a bike tool designed for this.
08-08-09, 08:46 PM
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drill and tap
08-08-09, 08:52 PM
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There are ways to get that out but the trick will be not not bugger up the crank arm. Could you carefully secure the crank arm and then make three cuts with a metal saw to essentially break the crank bottom bracket sleeve into three pieces? I don't know how firm that bottom bracket axle sleeve is in there. There are these tapered tool for retrieved a broken irrigation fitting out of the threaded pipe but I don't think that your crank am will give it up that easily. Never know. BTW, how'd that get broken in the first place?
08-08-09, 08:55 PM
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Yes, the tap twist thing is available at a plumbing or irrigation parts supply. I bought mine at Home Depot or Lowes when I broke off sprinkler heads with the lawnmower and needed to get the broken threaded pipe out of the irrigation pipe that is in the ground. Thought I was fked until I found that tool. They come in different sizes, 1/2 or 3/4 inch pipe.
08-08-09, 08:58 PM
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Alright - any idea what those cost?
And not sure how it happened, didn't ask. We think it was something like it wasn't bolted on tight, then the crank arm came off and snapped off half the bolt.
And not sure how it happened, didn't ask. We think it was something like it wasn't bolted on tight, then the crank arm came off and snapped off half the bolt.
08-08-09, 09:05 PM
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wow, can't believe no one has started a "crank stuck in parts" thread
08-09-09, 12:40 PM
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the bolt that "pinches" the crank arm is broke? that should be a an easy job with a drill and easyout. is that shop looking for competent help?
I think that is why alot of people always 'put down' local shops. most 'mechanics' can olny replace stuff these days.
I think that is why alot of people always 'put down' local shops. most 'mechanics' can olny replace stuff these days.
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One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
08-09-09, 12:49 PM
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If it's threaded on, you can take a cutting wheel on a Dremel, make an incision into the bolt, and use a flathead screwdriver to get it out. Done it a hundred times.
08-09-09, 01:01 PM
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I looked at that photo again and one of the early posts that recommended the easy out for getting the threaded screw out of the compression opening of the crank arm needed to be done first before you can get that piece of the axle out.
08-09-09, 01:16 PM
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This is what I would do. Either make an incision in one side and hammer it around with the screwdriver in the slot, or cut a slot on each side, and use a big screwdriver to fit in each slot and just turn it.
