Hello all,
I am trying to figure out how to make an internal 3/8-4 double lead acme thread. I have tried getting help from large company's like Sandvik, Vargus, xactform, etc, but have not had any luck. The part I have to thread is around 3/4" long. Everyone I talk to says this cant be done, but I have the part in my hand that is currently being made. Any help is appreciated. The material is similar to D-2. It is a 29 degree thread.