there are thread files, not sure if it is a bicycle thing, but we use them occasionally around the shop for buggered threads. 4 sided square rod with a 4 sets of thread files on each side. so I total of 8 thread types. I think we have 2 different ones, but we really only use the one, the other must be for a coarser thread. maybe ask tool supplier for one of those. we use them on axles and hub threadings. joel ralph flood philadelphia, PA USA
On Thu, May 22, 2008 at 2:52 PM, jeffrey piwonka <jmpiwonka@yahoo.com> wrote:
>
>> I wonder if such a die even exists and would be very
>> expensive if it did. I
>> would think that the original threads were cut on a
>> lathe (or automatic
>> screw machine). If you have a good spare lockring
>> with the correct thread,
>> file some notches in it like those in a die, clean
>> up the burrs, then use
>> it to chase the damaged threads on your hub. In
>> fact, just an unmodified
>> lockring with lots of lube and a bit of persuasion
>> should straighten the
>> threads if they're just deformed.
>
> i thought of that, but only have the phil lockring and
> don't really want to cut those threads.
>
> i called a good machinist, he told me what tool
> supplier to call. they told me they could have it made
> for a couple hundred dollars. anyone else have some
> hubs they want to chase the threads on??? lol.
>
> i'll just use my triangular file some more then grease
> it and go for it i guess. there is one section of
> threading that is rolled over a bit that might be the
> culprit of all the friction.
>
> Jeff Piwonka
> Austin, Texas, USA