Long story how I got in this mess, lol, but here I am. I need to lengthen the register/clearance area on this backplate. It's .025 from bottoming on the spindle like it's supposed to, but since I did the original work in my 3 jaw I'm wanting to set up in a 4 jaw to get concentric for the cut.
This big 10" is the only 4 jaw I currently have mounted. This backplate will solve that issue BTW because it's for a sweet little 8" I got from BadDog that's much appropriate for an 11" bench lathe.
As you can see I'm having a jaw problem. If I go with the middle step on the jaws there's too much extension. Won't clear the bed. But I can't go on the outer most step because then all 4 jaws run into each other before they reach the piece.
So I compromised!
It's tuned in to under .0005. Planning on 360 rpm to cut about a quarter of an 8 tpi thread out. Should I throw the switch?