RADBMX.CO.UK

Technical & Reference Section => Tech and Restoration => Topic started by: davevilla on March 24, 2008, 03:51 PM

Title: Help with getting a chain wheel off a OPC?
Post by: davevilla on March 24, 2008, 03:51 PM

Afternoon chaps

I wonder if anyone out there had any tips for getting the chain ring locking nut off a one piece crank please?

I've got the crank out of the frame and removed the non drive nuts, bearings etc. - I'm now left with the crank with the chain ring attached - it looks as if I need a some sort of spanner to get it off as the locking nut appears to have flattened sides - a bit like a squared off circle on opposite sides? I have tried every spanner I can get hold of but non are big enough...

Am I missing something really obvious?

Cheers  :daumenhoch:

Title: Re: Help with getting a chain wheel off a OPC?
Post by: Waxintaxin on March 24, 2008, 04:01 PM

yes

you need a bigger spanner

Title: Re: Help with getting a chain wheel off a OPC?
Post by: davevilla on March 24, 2008, 04:07 PM

 :LolLolLolLol: thought so...

Silly question...

Title: Re: Help with getting a chain wheel off a OPC?
Post by: jackel on March 24, 2008, 04:10 PM

think its 32mm :) or a big adjustable spanner :)

Title: Re: Help with getting a chain wheel off a OPC?
Post by: davevilla on March 24, 2008, 04:13 PM

Nice one mate  :daumenhoch:- looks like I'm off to Focus DIY (again - for about the 15th time this weekend - been doing up the bathroom see...)

Title: Re: Help with getting a chain wheel off a OPC?
Post by: phantom photon on March 24, 2008, 04:15 PM

Pair of mole grips workd for me  :daumenhoch:

Title: Re: Help with getting a chain wheel off a OPC?
Post by: bof on March 24, 2008, 04:39 PM

Or grip it in a vice. :daumenhoch:

Title: Re: Help with getting a chain wheel off a OPC?
Post by: Goose1 on March 24, 2008, 07:21 PM

Get yourself a 12" adjustable spanner and grind the stop off for the adjuster, you have a much larger range. That's what I used for the nut. :daumenhoch:

Title: Re: Help with getting a chain wheel off a OPC?
Post by: 2020mad on March 24, 2008, 11:40 PM

pipe grips or monkey wrench  :daumenhoch:

Title: Re: Help with getting a chain wheel off a OPC?
Post by: oberonspacefruit on March 25, 2008, 09:01 AM

pipe grips as he says.


ive used a hammer and chisel before, and that seem to work.

remember to turn it the right way though.