26 tpi nut.
Join Date: Mar 2008
Location: Rhode Island (an obscure suburb of Connecticut)
Bikes: one of each
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Some bike shops have a cotter press (in the old days they all did). You can buy one for about $60.
If you have a stout C clamp and a socket, you try to squeez it out (the socket goes in between the crank and the clamp so the cotter has somewhere to go). Once you've applied all the squeeze you can with the clamp, you tap it (the clamp) with a hammer and it (they cotter) will usually pop out.
You can also cut a piece of pipe to just the right length to reach from the floor to the crank and pound the cotter down into that.
You can just tap it with a hammer but if you tap too hard without backing of some sort you will damage the bearing races.
If you're still fighting it, go to bed. next evening when you're not shaking mad at it, drill it out. Remember, it's flat on the side that faces the spindle so aim a little off center with the drill.
Read this too;
I have spoken.
Last edited by sailorbenjamin; 11-08-09 at 09:36 PM.
Reason: that's what I tried to copy 3 times.