Circus Bear
Plastic
- Joined
- Oct 17, 2018
Problem
I have a Cadillac 14x28 with A5 Short Taper mount. The spindle runout measured on the outside of the spindle face is 2 tenths and I'm thrilled at that given the age of the lathe. The MT5 taper in the spindle has lots of shallow but visible nicks and dings from years of parts roughly inserted into the bore of the chuck. I have stoned the surface as carefully as I can and have improved the runout of a dead center but only to 0.001". When I mark the high point on the spindle face, it is repeatable when I remove and rotate the dead center so the issue is in the bore of the spindle, not the dead center.
Set the Compound Rest Help
Asking for experienced advice on setting the compound rest to the correct angle of the MT5 spindle bore. My approach is to chuck a piece of stock, face off and center drill. Suspend the MT5 dead center between the checked center drilled hole and the tailstock center (point towards the chuck). Adjust the angle of the compound rest to parallel the operator side of the dead center using a test indicator. This should set the compound rest to the angle of the non operator side of the spindle taper.
Cut or Grind?
Flip my boring bar face down and skim the nick high points from the the back side of the taper using the compound rest. or...I have a tool post grinder just not sure if I have the reach needed to hit the length of the taper.
Is my approach sound or am I missing something? Constructive feedback requested.
I have a Cadillac 14x28 with A5 Short Taper mount. The spindle runout measured on the outside of the spindle face is 2 tenths and I'm thrilled at that given the age of the lathe. The MT5 taper in the spindle has lots of shallow but visible nicks and dings from years of parts roughly inserted into the bore of the chuck. I have stoned the surface as carefully as I can and have improved the runout of a dead center but only to 0.001". When I mark the high point on the spindle face, it is repeatable when I remove and rotate the dead center so the issue is in the bore of the spindle, not the dead center.
Set the Compound Rest Help
Asking for experienced advice on setting the compound rest to the correct angle of the MT5 spindle bore. My approach is to chuck a piece of stock, face off and center drill. Suspend the MT5 dead center between the checked center drilled hole and the tailstock center (point towards the chuck). Adjust the angle of the compound rest to parallel the operator side of the dead center using a test indicator. This should set the compound rest to the angle of the non operator side of the spindle taper.
Cut or Grind?
Flip my boring bar face down and skim the nick high points from the the back side of the taper using the compound rest. or...I have a tool post grinder just not sure if I have the reach needed to hit the length of the taper.
Is my approach sound or am I missing something? Constructive feedback requested.