Curious is good IMO. :)
The bore ID is ready for threading at 1 1/2" x 8TPI, and the outside diameter is oversize as well. The register is machined to a touch undersize as well at this stage.
Quote:
I need to get the thread cut (I don't have the means to machine 1 1/2 x 8TPI), so that I can mount on my lathe spindle for final machining. That way, everything will be spot on concentricity wise. :wink:
ie:
- Get the thread machined.
- Mount back plate on lathe spindle and machine for back face of chuck.
- Mark holes and bore slightly oversize holes for mounting studs.
- Mount chuck and machine down diameoterf back plate to suit OD of chuck.