- Joined
- Dec 31, 2010
- Messages
- 937
I inherited a 3 jaw 5 inch chuck and a backing plate with pre-drilled & tapped holes and had a friend help mount it. Not wanting to drill through the chuck we drilled and tapped new holes in the back of the chuck. This friend is a machinist by trade and has an impressive shop.
My question is can I improve the TIR (-0.003+0.001) by turning the backplate? I have 3 types of cutters that could be used: HSS, braised carbide and carbide inserts. ,and can grind the HSS to where it leaves a good finish. The chuck goes on a Clausing 100 MKIII that has a 1-1/2" x 8 tpi spindle. The spindle register has approximately + 0.0005"-- 0.000 runout. I would start by honing a HSS bit and make a light truing pass on the register with the compound rest cinched down and the cross-slide ways tightened then mount the back plate and make a light cut after adjusting and re-tightening the compound rest Knowing a few things more now than 20 years ago (thanks to this group) I think I can improve the run out but want to be sure I am not overlooking something. Thanks for all help offered.
My question is can I improve the TIR (-0.003+0.001) by turning the backplate? I have 3 types of cutters that could be used: HSS, braised carbide and carbide inserts. ,and can grind the HSS to where it leaves a good finish. The chuck goes on a Clausing 100 MKIII that has a 1-1/2" x 8 tpi spindle. The spindle register has approximately + 0.0005"-- 0.000 runout. I would start by honing a HSS bit and make a light truing pass on the register with the compound rest cinched down and the cross-slide ways tightened then mount the back plate and make a light cut after adjusting and re-tightening the compound rest Knowing a few things more now than 20 years ago (thanks to this group) I think I can improve the run out but want to be sure I am not overlooking something. Thanks for all help offered.