03-08-2013, 09:31 AM
I'm not familiar with your lathe, but most imports that came with taper attachments used a 'telescopic leadscrew' on the cross-slide. Lookin at the parts list (and assuming it's the same machine), they don't show it...
A possibility: a sturdy tube surrounding the screw with a cutout for the leadscrew nut, one end with a flange to mount the handwheel thrust bearings and block, the other extended out the back of the cross-slide for the taper adaptor to move the screw in and out (maybe with needle rollers to support the back end of the screw) - that would also allow adjusting the depth of cut as normal using the cross-slide handwheel when cutting tapers...
It would probably mean milling the cross-slide for clearance around the tube, and you'd need a way to secure the tube for normal straight turning, but might just work? You'd have to allow for the handwheel and block moving in and out, somehow, and some way to stop the tube rotating would be essential - perhaps long dowel pins in the cross-slide base (saddle), the tube's flange and bearing block riding on 'em?
If that sounds feasible I could get some CAD practice and draw up a not-to-scale sketch to clarify...
Just my ha'pennorth,
Dave H. (the other one)
A possibility: a sturdy tube surrounding the screw with a cutout for the leadscrew nut, one end with a flange to mount the handwheel thrust bearings and block, the other extended out the back of the cross-slide for the taper adaptor to move the screw in and out (maybe with needle rollers to support the back end of the screw) - that would also allow adjusting the depth of cut as normal using the cross-slide handwheel when cutting tapers...
It would probably mean milling the cross-slide for clearance around the tube, and you'd need a way to secure the tube for normal straight turning, but might just work? You'd have to allow for the handwheel and block moving in and out, somehow, and some way to stop the tube rotating would be essential - perhaps long dowel pins in the cross-slide base (saddle), the tube's flange and bearing block riding on 'em?
If that sounds feasible I could get some CAD practice and draw up a not-to-scale sketch to clarify...
Just my ha'pennorth,
Dave H. (the other one)
Rules are for the obedience of fools, and the guidance of wise men...
(Douglas Bader)
(Douglas Bader)