Be brave, man!! do a close visual inspection ( Magnifier or Loupe) of the
starting point of the thread, make sure you can see the 'ramp', if it looks
mashed, try touching it up with a very small triangular file. put a little
oil on the threads ( high sulfur cutting oil if possible)
and without using a wrench or holder, see how the die likes the thread. if
you can get it to start, proceed -by hand- a few revolutions. back off the
die, and take a look with the loupe again. you'll see new shiny metal, the
question now is whether it is just knocking off/reshaping the damaged
threads or trying to cut new ones at a different pitch. On close
inspection, you should be able to tell whether the die is trying to cut the
side off of the threadform, which would be an indication of the wrong pitch.
I say this based on Randall's observation of a somewhat questionable fit on
his thread gauge, and the fact that 27, 28, and 32 TPI are all identifiable
thread pitches for this diameter. Go slowly, and back the die off to check
your progress frequently. Don't just spin the die on with a BF wrench,
hoping for the best.
Good luck,
Bob Westerdale
59 3A TS36967
snip> Now what we need is for someone with a bunged-up shaft to buy the
die and
try it ...
Now I'm scared! I have borrowed the 9/16 x 28 tpi. tap & die. Might I be
the one that ends up with the "bunged-up shaft" for experimenting?
Bunged-up before or after I try this size die?
Bob Greene
Cape Cod British Car Club
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