materials:
drill press
8x22x7 ball bearing
1/4 inch plexiglass
1/4 inch hex nuts
1/4-20 x 5/8 socket set screws
7/8″ = 22MM hole saw
2″ = 51MM hole saw
Mazak Slant 60, threading some large dia. pipe at a jake leg plant in Houston, TX. The chucks are 42″ spring chucks.