Internal threading a chuck backplate

Need to make a couple chuck back plates. Center hole will be internally threaded to match the spindle thread on the Boxford AUD. This will be the same thread as on a Southbend 9 or 10, 1.5" 8TPI.

[@ypaulbrown]

good day Gary, thanks for sharing, Paul in Florida

[@RUNCNC]

Good job!

[@ypaulbrown]

Great Job Gary....needing to make a back plate for my 13" South Bend...1 7/8 x 8...cheers, Paul

[@trollforge]

Gary, I spent a fair bit of time researching proper procedures before making mine, and that led me to believe that you are supposed to counter bore the back, to index off the face and sides of the shoulder on the spindle...

[@garysgarage101]

That's correct. Most chucks have a recess on the back for that purpose. I wasnt so concerned with doing it on this one BC the chuck was a 4 jaw do doesn't matter where it sits.

[@trollforge]

@@garysgarage101Ok, that makes sense!