Berger Sphere Caliper?

Re: Berger Sphere Caliper? *LINK*

Dick Coers

By range you mean size? I saw at one old site they are 10" long. Not much current information out there. Here's a link to the math involved with his method.


http://www.frontrangewoodturners.org/newsletters/frw2008_07.pdf

Re: Berger Sphere Caliper?

david delo

The prime caliper opens up to 9.5" on mine and still has a nub protruding for the secondary caliper. Never did anything that big so can't say how well it works. At 9", it looks like it would function as normal.

Re: Berger Sphere Caliper?

Tom Albrecht

Thanks David, so are you saying that using his layout tool, the max sphere you could turn would be 9.5 "?

And what about the small end of the range?

TA

Re: Berger Sphere Caliper? *LINK*

david delo

I took a picture at 9". As you can see, the tips of the 2nd caliper is almost gone. At 9.5", those tips almost disappear. You need those tips for the 2nd set of facets that get put on the piece. If you google Berger Sphere Calipher you'll see his 9 minute or so video, if you don't understand what I'm saying. I've only done 2" to 5" spheres with it but I see no reason you couldn't use it to do any small size you wanted to. However, if you were trying to make 1/2" or below, I'd just rough them out freehand and finish up with the 80 grit gouge.


http://i191.photobucket.com/albums/z132/davedelo/Cherry%20Burl%20Bowls%201/berger%20sphere%20caliper%201_zps78dprvsu.jpg

Re: Berger Sphere Caliper?

Tom Albrecht

Thanks again David. I did watch the video before, and I see what you mean. I just found it odd that there were no specs offered on his website and no contact link for questions. Your posts solved it for me.

TA