Quote Originally Posted by John S View Post
One question?
Why did you remove metal from the OD but finish off turning it in the lathe ?
Why not either turn it all off or mill it all off ?

Other than that nice job.
John, the material wasn't precisely centered in the chuck while milling. You can see mill is barely cutting at the back of pulley during the rough cut. So I decided to mill outer circle bigger than PCD and turn the pulley later. Another reason was: the center hole I finished drilling on a router with 6mm dia, I couldn't stick in longer drill -with 6mm drill I had to hold it partially by flutes and to have only few spare mm from upper Z limit. I finished later the holes with a bigger drill + reamer on a lathe 8mm and 10mm dia. I think I could mill the outer diameter on a router, but because of Z limit I had to hold material low. Few more spare cm on Z axis would make it possible thou.