Help with getting a chain wheel off a OPC?

[davevilla]

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 

[Waxintaxin]

yes

you need a bigger spanner

[davevilla]

  thought so...

Silly question...

[jackel]

think its 32mm or a big adjustable spanner

[davevilla]

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

[phantom photon]

Pair of mole grips workd for me 

[bof]

Or grip it in a vice.

[Goose1]

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.

[2020mad]

pipe grips or monkey wrench 

[oberonspacefruit]

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.