- Joined
- Mar 25, 2013
- Messages
- 4,638
I have a 6" Bison 3 jaw plain back scroll chuck that I need to move to my new D1-3 spindle. I have the D1-3 adaptor plate but it is not drilled for the chuck. I have researched online and I cannot find a diagram of the bolt hole pattern for the Bison. Does anyone know the radius of the pattern offhand? Anyone know where to look? If this is not published I need a way to measure the distance of the bolt circle from the center. I was thinking about turning two screws to a point and then placing them in opposite holes and measuring the distance. Any simpler ideas? I could use the original back plate as a template but that may be hard to line up. FYI- I have a rotary table so I should be OK on the spacing, I just need the radius.
Robert
Robert