Classic Folk:
A recently acquired Zeus-2000 rear derailleur turns out to have stripped threads in the hole for the cable-binder bolt.
I have half an idea about what I might try, but seeing as how there's such a satisfying surfeit of cycle science among this crowd I thought I should ask for advice before I turn into the notorious 'Doctor Butcher' on my own.
The cable-binder arrangement is similar to the campy NR: the hole is threaded through a tab which extends from the trailing edge of the front parallelogram plate. It's threaded for a 5mm bolt. As one might expect, the steel bolt is A-OK and the aluminum hole took the damage. The threads were perhaps stripped via misalignment rather than over-tightening (?) because the threads are only gone over about 200 degrees out of the full 360. The 'land' around the hole is only 1 or 2 mm thick so I'm gonna assume that replacing the threads with a helicoil insert is out of the question.
Since the hole still has threads 'on one side', it occurred to me that I might be able to simply epoxy a small shim to the stripped side of the hole, thus forcing the bolt to engage the remaining threads on the opposite side. Or I could epoxy some thicker shim material in the hole and attempt to re-tap it. Or I could look into finding a slightly larger non-metric screw and re-tap for that. There again it could have a future as a paperweight.
Thanks for listening
Brad (have 4 of 'em, but wanna use the broken one) Stockwell
Rain deluged Palo Alto