Mounting Plates for 4-Jaw Independent
  cush

Mounting plates are precision machined to suit the spindle nose
of your machine. Plates are stocked semifinished. If ordering plates
separately, specify the model number of your chuck so that Cushman
can finish  machine the adapter to suit your Cushman chuck.

HARDINGE
THREADED SPINDLES
Type A American Standard Short Taper A-1 & A-2 Spindles
Type D Mounting Plates - "Camlock"
Type L American Standard Long Taper Key Drive Spindle