Jan:
Assuming that you have an extra (i.e. sacrificial) TA crank puller, you might try converting it to a tap/thread chaser. I imagine that would involve reducing the height of the threads at the front and filing a groove longitudinally to obtain a cutting/thread-forming face. Reducing the height of the threads at the front so that it is tapered might allow it to get in a bit deeper on the remaining threads in the arm without crossthreading. Are you working with a steel or alloy crank?
Charlie Young
Honeybrook, PA
> Does anybody know where I can find a tap to chase the
> crank extracting threads on a TA crank - 23 mm
> diameter... It's not a TA crank, and it's worth saving,
> but somebody banged a hammer on the outside to fit the
> crank, and it distorted the threads so the extractor
> doesn't fit any longer.
> I have tried to file out the damaged part, but can't get
> the extractor to go in without cross-threading. If I had
> the tap, I could chase/retap the threads, and it should
> work.
> Does anybody have one who'd be willing to lend it? Or does
> anybody know whether this is a standard size that my
> hardware store could order?
>
> Or does anybody have other ideas of what might work?
>
> Thanks,
>
> Jan
> _______________________________________________
>
Charlie Young
Honeybrook, PA