Repairing Pedal Threads
The threads in this Zeus crank arm were in really bad shape, so I made a steel insert. Fortunately there were enough of the original threads left to allow me to get the crank arm clamped in my mill vise and preserve the alignment. The photo sequence skips over a couple of failed attempts where I tried to thread the ID of the insert before I put it in the crank arm, and the insert just broke. The final solution was is to cut the pedal threads after the insert was glued in place. Yeah, I know that you can buy kits to do this, but that's no fun.
Repairing Pedal Threads
The threads in this Zeus crank arm were in really bad shape, so I made a steel insert. Fortunately there were enough of the original threads left to allow me to get the crank arm clamped in my mill vise and preserve the alignment. The photo sequence skips over a couple of failed attempts where I tried to thread the ID of the insert before I put it in the crank arm, and the insert just broke. The final solution was is to cut the pedal threads after the insert was glued in place. Yeah, I know that you can buy kits to do this, but that's no fun.