What is the thread pitch between the extractor rod and extractor ratchet shaft? When I measure, I get #10 with 64 tpi . . . left hand! Not exactly a pitch included in your average starter tap & die set!
If it makes a difference, I'm working on a 5-screw improved I-frame Terrier s/n 71720 from circa June-1953.
Whatever size it is, where can I get both a tap and die?
In the Neal / Jinks book is a reference to that pitch being changed to 7 x 47. I think that it may be a typo, but I pretty much quit looking for the proper tap when I read that! I would love to have a tap & die to tidy up the threads on an extractor rod.
I'm satisfied we're dealing with a #10 (.183"-.186" diameter) but I'm a long way from getting 46, 47 or 48 tpi. Will try to find a left-hand 10-48 tap & die . . . wish me luck.
I'm satisfied we're dealing with a #10 (.183"-.186" diameter) but I'm a long way from getting 46, 47 or 48 tpi. Will try to find a left-hand 10-48 tap & die . . . wish me luck.
Russ
linde,
I know this is old thread but I am facing same problem now wanting to clean up threads on extractor rod on an old model 36. Were you able to find a 10-48 die that would allow you to chase the threads?
Was 48 Correct TPI?