Hello guys, I'm new! I am in need of a little help.
I've been trying to make a 7/8-6 ACME thread on this 4140 shaft. My hole program runs great, except for one problem. The first two to three threads do not seem to be exactly the right pitch... If I cut that end off, the rest of the threads are great... They screw into the mating piece no problem... I've spent the last 2 days rechecking everything in the programing and mechanically. Everything checks out.
Anyone have any advice?