Jim Stewart

CAS
Are you advancing the compound at 30 degrees or straight in?
Heavy cuts or light cuts?

Jim
30 degrees until the end then last fine cut
straight in.

You advance the compound for all cuts. Why vary that for the last cut?
The last cut should be a "free ride," that is, advance nothing and run the
operation again. It will cut more metal.

The tip of the threads may crumble some. (I have no experience with W1).

Can you check with a nut to see if even a crumbled thread vee is acceptable?

Stone the threads after the final pass to clean up?

When you start, you check your tool with a center gauge to make sure it's dead
on? And know it's dead on center height?

Do you turn the right end of the work down to the minor diameter, so it tells
you when your toolbit tip hits there? Perhaps you are cutting too deep?

Frank Morrison