Only the front of the thread got ruined and the bolt is not going in. I used this crank puller before in a bmx crank with 12 mm bolt and nothing bad happens.The bolt size is 9.5 and the thread pitch is 1mm. How this can be fixed?
by smashedbearing
Only the front of the thread got ruined and the bolt is not going in. I used this crank puller before in a bmx crank with 12 mm bolt and nothing bad happens.The bolt size is 9.5 and the thread pitch is 1mm. How this can be fixed?
by smashedbearing
2 Comments
You’re gonna need a tap to clean the threads, some oil, and a steady hand to chase them.
I think it’s probably time for a new spindle. Threads lock together by each item’s thread putting sideload pressure on the other item’s thread. They’re thin slithers of metal and eventually they will get fatigued and shear off, especially if they’ve been overtightened in the past.
You can try cleaning out the burr from the thread channels so you can wind the bolt in again, but then you’re riding with less thereads holding the spindle bolt, and the likelihood is that all of these threads have been stressed the same, and will just keep shearing off.
Personally I’d replace at this point.