I am having trouble threading a 1/2 diameter cold rolled steel rod with a 20 tpi NF die. The threads are tearing and look ragged. I am using cutting fluid but still get the problem. Is it because I am going too fast or the OD of the rod is too big?
Doing this by hand makes it difficult to control the speed. The cutting is going on in starts and stops. Should the shaft be tyaken down a wee bit?
Any ideas for the lathe challenged to help solve this problem are greatly appreciated....and yes buying a lathe is impossible at the moment.