Terry Coombs wrote:
I decided to do a project that involves both casting and milling ,
with some lathe work tossed in for good measure . I've been pondering (I
learned the big words from my wife the teacher) how to mount a chuck to my
new rotary table . So this afternoon while the wife recovered on the couch ,
I made a pattern . It's foam , it's buried in bonded sand , and when finish
machined will be a round plate with four slots that will bolt to the rotary
table with a threaded "spindle" on the front to screw a chuck onto . By
cutting the slots at right angles to the radial slots on the RT , I'll be
able to adjust it for center .
Pour in the morning ...



When I made an adapter plate for a 3 jaw chuck for my rotary table I
added a boss in the centre which locates in the central hole of the RT
when the Morse taper adapter is removed. That allows me to drop it in
place and go as it is accurate enough, about 0.001" TIR, for all I
normally do. The boss is removable for times when I just place the chuck
and adapter straight onto the mill bed for holding round pieces.