Having a Ball!

[Captain Eddie]

I'm turning spheres, balls, and am using a very crude jig for turning the radius. I have seen one such jig using a pair of ball bearings for the pivot point. I just don't remember where I saw it. Looking for a little help in this. Web sites appreciated.

 

[pencheff]

I'm turning spheres, balls, and am using a very crude jig for turning the radius. I have seen one such jig using a pair of ball bearings for the pivot point. I just don't remember where I saw it. Looking for a little help in this. Web sites appreciated.

Not sure if either of these are what you're looking for.

Here's a French site for a DIY jig.

And here's a link to an Aussie Inventor's professionally produced version.

 

[John Abt]

Both of those sites appear to be similar in nature to the jig described in David Springett's book "Woodturning Wizardry".

 

[webturner]

another Ball Cutting Jig

Richard Stapley has plans for a more elaborate Ball Cutting Jig
You will have to read all four sections of the article to understand the whole thing.
http://www.laymar-crafts.co.uk/tip39.htm

 

[laymarcrafts]

My site also has a less complex Ball Turning Jig.

http://www.laymar-crafts.co.uk/tip48.htm

But the principle is the same for any of the Jigs around, just a case of what you have available to make it.

Richard

 

[Jonathon.C]

It isn't that hard to turn a near perfect sphere... Soren Berger uses a simple piece of pipe maybe 1"-1.5" and runs it over the sphere to check for high spots or flat spots.