Lathe ball turning attachment.

[Rob G]

Measured drawings can be found here.

http://www.metalwebnews.com/howto/turning-tool/spherical_turning_tool.pdf


Frame was wired out at work. Material is .750" x 4" crs.

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner15.jpg

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner16.jpg

Drilling, reaming, and tapping holes.

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner21.jpg

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner23.jpg

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner24.jpg

[Rob G]

Radiused edges.

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner29.jpg

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner30.jpg

Bushings, drill rod pivot pins, handle etc.

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner28.jpg

Complete assy.

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner31.jpg

[300sniper]

pretty cool again. the only issue i have with this design and your id radius attachment is having to do trial and error to get your radius correct. i can't think of an uncomplicated way to fix that though.

[Rob G]

First piece.(it is not as rough as it looks)

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner8.jpg

http://i159.photobucket.com/albums/t150/robg_010/Ball%20turner/Ballturner9.jpg

I need to pick up some finer grit emory paper and I would also like to switch to a carbide insert tool to try and achieve a smoother cut.

Would anyone be able to recommend a particular style or type? One of the toolmakers suggested that a triangular insert with a radius of .030" would work well for this.

Video: Making the ball for the handle.
http://www.youtube.com/watch?v=OCbA0mNMNzs

[Rob G]

pretty cool again. the only issue i have with this design and your id radius attachment is having to do trial and error to get your radius correct. i can't think of an uncomplicated way to fix that though.

Thank you.

So far I have been able to get things pretty close by just using a scale to set the distance of the bit. I'm sure with more practice I'll get better at it.

Both cutters.

http://i159.photobucket.com/albums/t150/robg_010/Big%20radius%20cutter/Bigradiuscutter28.jpg

[300sniper]

I need to pick up some finer grit emory paper and I would also like to switch to a carbide insert tool to try and achieve a smoother cut.

Would anyone be able to recommend a particular style or type? One of the toolmakers suggested that a triangular insert with a radius of .030" would work well for this.



a carbide insert with a radius will definatly leave a smoother finish. grinding a radius in your hss cutter would also help.