remove a stripped crank arm?
 

Due to inattention on my part, I managed to strip the threads of my Campy crank where the removal tool threads in. This means I can't remove the crank arm, and naturally it's on the drive side.

Any hints how to remove it non-destructively?
I thought of an automotive pulley puller, but since the crank spider has five spindles, the pully puller won't grab.
I've tried propping the bike up and resting the spider on a couple of 2x4s and gently tapping on the bb axle with a rubber mallet and a bolt. Didn't work, and maybe I'm too afraid of bending or breaking something to give it adequate force.

It doesn't look like a job for a helicoil.

Help?

I have the same problem on one of my bikes, but I still haven't had to pull the crank (sealed BB). A two prong puller wouldn't work?

There have been 3-4 threads on this in the past 9 months. Do a search. Options include: Bearing puller, destruction, and a crazy technique with a socket on a cement floor.

Hey, I resemble that comment. By the way, the method works very well.

Find a socket that just fits inside the square of the crank arm.

Put the socket on a cement floor.

Place the bike over the socket so the socket is inside the square of the crank arm. Have someone hold the bike.

With a flat punch and a BFH (big f@cking hammer), hammer on the crank arm as close as you can to the bottom bracket. Put a big flat washer between the punch and the crank arm to protect the soft metal.

Another way is to ride the bike until the crank comes loose... Just make sure you check every once and a while to see whether it is loose, as riding with a loose crank can damage it even more - that is if you want to keep the crank.

Make sure you leave the screw in, so the crank doesn't just fall off - and ride carefully. I have never had to do this, but I read somewhere that it works.

Crazy good, not crazy bad.