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On bicycles there's a giant pliers for this...
Posted by RayF (more from RayF) on Wed, 4 May 2011 16:53:53
In Reply to: Re: shift coupler tapered pin (broken nut), MarkusD, Wed, 4 May 2011 12:13:18
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On old European bicycles with three part steel cranks, they use a big taper pin with a flat side, on each crank, to hold the crank on the crank axle, which also has a flat.
It's set in there pretty tight - - I used to smack the broad end with a 1 1/2 pound hammer, then run the nut up only to hold it. Common impression that the pin was supposed to be pulled in by the threads and nut on one end has gotten a lot of people into trouble. They'd strip off the threads trying to get them tight enough and still have them come loose and start pounding and moving and fall out. Need to be set in firmly - - it's soft iron, binding together two hardened steel parts.
To remove them, I'd run the nut out to the end of the threads, smack straight on with a hammer, then remove the nut and the pin would come out easily.
Anyways, for those there was an official shop tool, that I've seen in a catalog, that was a giant pair of 2 foot long pliers with shaped ends. Used one way it set the pin in firmly, used the other it punched it out.
Oughta be something like that for these pins. Maybe you could make something up that used a C clamp with a hole in the fixed jaw?
posted by 71.173.78...
Posts in this Thread:
- shift coupler tapered pin (broken nut), turbosaab
, Tue, 3 May 2011 17:41:47- Re: thanks all, turbosaab
, Thu, 5 May 2011 06:28:58 - Re: shift coupler tapered pin (broken nut), MarkusD, Wed, 4 May 2011 12:13:18
- Re: shift coupler tapered pin (broken nut), DanaH, Wed, 4 May 2011 08:51:16
- Several options, adamK, Wed, 4 May 2011 06:26:02
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