D-4 or D-6 chuck

[Nvreloader]

Guys,
What the best way to measure a D-4/D-6 type chuck, to figure out which one I have?

It has 3 studs on the back, I what to make a spider for the lathe.

Tia,
Don

 

[Tim Singleton]

http://www.victornet.com/reference/Lathe_Chuck.html

 

[Nvreloader]

Thanks Tim,
I'll go measures for the spec's.

Tia,
Don