Are we confusing a tap with a die?
I understood that the PEDAL was damaged which then may chew up the softer
crank threads.
It is difficult to put a die on the hardened pedal spindle without damaging
something,
The suggestion to use a thin edge jeweler's type file is the best.
Try to see if the file will"clean" up some of the pedal thread defects so it
will screw in smoothly.
I've even ground the thread smooth in a small spot or two with a tiny wheel
to remove damaged spot on thread, and then with a smooth void in the small
thread the pedal could thread into the crank without damaging same. Don't
forget to lube your thread sufaces.
Also look into the crank and make sure no chips or residue is in the crank
threads.
If any, remove with pick or dentist type tool, and run a tap through for
clean-up and sizing.
DON'T JAB your FINGER, please. You may be using a lot of force and slipping
is easy.
You could also get a real sharp chisel und tap the edge between the pedal
threads and see if the threads straighten out. That's worked for me also
occasionally.
Ted Ernst
Palos Verdes Estates
CA USA
>
> Dan Kasha wrote:
>> I have a campy pedal that seems to have slightly mangled treads. Is
>> there a readily available (9/16th??) die that I can use to clean up
> the
>> treads? Can I get the die at my local hardware store?
>
> Yes it is 9/16" x 20 tpi. You didn't mention whether right or left.
> The right-hand die shouldn't be too hard to find, though it is not a
> common size. Here's a cheap one ($24):
> http://www1.mscdirect.com/
>
> It's just carbon steel though, may not be hard enough for a Campy pedal
> axle with chrome-plated threads. You might need HSS or better, but in
> your favor, you're not cutting new threads so the cheap one may work.
>
> I have a thread-chasing file, which is very good for fixing one
> bunged-up area on an otherwise-good thread. A thread file doesn't care
> what diameter, or right or left-hand -- you just need one at 20 tpi.
> Call me if you want to borrow it -- I'm in Wallingford if that is
> convenient for you to come pick it up. 633-2602, I will be out part of
> the day tomorrow.
>
> Mark Bulgier
> Seattle WA USA