Whitney question.

Mykaru · Post by **Mykaru** » Mon May 29, 2006 11:26 am

Anybody know what the pitch of the threads on whitney punch dies is? I seem to remember years ago a machinist friend telling me it has an oddball pitch.

Alcyoneus · Post by **Alcyoneus** » Wed May 31, 2006 5:32 pm

I took one to work today, the 5jr is 7/16x20. I have one of the larger punches if you need that info, but I probably won't do that until Friday.

Alcyoneus · Post by **Alcyoneus** » Thu Jun 01, 2006 11:48 pm

The #8, which uses the same sets as the # 7 or 7 1/2 (maybe both?) is 7/8 diameter, I'll get the threads in the morning.

schreiber · Post by **schreiber** » Fri Jun 02, 2006 9:59 am

I'm in the process of trying to make bottom dies for my #8, it is indeed 7/8" and 14 TPI.

It's also turned down to 3/4" below the threading so you can screw it up farther than where the threads end.

I was actually really surprised that I could mail order W1 drill rod in that diameter from mcmaster for almost as much as it would cost me to go pick up mild barstock from the highway robbers up the interstate...