Join Date: Jun 2005
Location: San Jose, CA
Bikes: trying to decide on sport tourer
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Damaged crank remover tool threads
In my case, I damaged the crank by smashing the leading (begining) part of the thread with a socket when removing the nut on the threaded stud of my vintage bottom bracked spindle.
I ordered a M22x1mm plug tap from Bike Tools Etc in Ashland, OR (email@example.com) for $26.50. While waiting for the tap to arrive, I tried cleaning up the damaged thread part with a small burr tool on a Dremel grinder. I was able to get the extractor tool to thread in and I removed the crank. The tap arrived the next day. I used the tap to clean up the thread some more. I had a vintage triple biospace crank in good condition that I did'nt want to damage by using a puller or other agressive methods.
It is a fine thread in soft aluminum, so one needs to be very careful in threading in the extractor. Start rotating the extractor by hand until you feel it start. If you use a wrench on the extractor to thread it in take it easy and don't force it or you may cross thread or destroy the thread. One should be able to screw in the extractor all the way in by hand. You will need a wrench on the inside bolt of the extractor to push the crank off of the bottom bracket square spines.