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chubbus
03-05-2015, 01:59 PM
Hi all.
I have just made the Steve Bedairs type ball turning device, but i am having to scratch my head over the setting it up .
If any one has one of these can you tell me the full set up info please, i need to know the tool post position in relation to the size of the ball to make ? thanks in addvance.

CHUBBS.

Carm
03-05-2015, 02:55 PM
To generate a true spere, any ball turning device needs to meet these parameters:
The tool tip is on spindle center.
The radius is set to the diameter required; and/or the tool arrives at the final radius via articulation, usually by screw.

If a close approximation is OK, use touch off. Turn the piece to req'd OD. Face the end. Move the tool towards the chuck the req'd OD, score a line.
Set the ball turner pivot at spindle center, and mid-point of the length by swinging the tool from face to score line. Lock the carriage.
Back off the cross slide and advance, whittling the ends off first.

chubbus
03-06-2015, 01:16 PM
Thanks for the reply, i did in fact find a good write up on you tube this morning on the jig so all fixed now.
Thanks again. Chubbs.