The XR20-W mounting ring adaptor plate enables fitting to rotary tables with unsuitable center recesses. It can also be used to secure the XR20-W to the chuck adaptor and custom mounts.

(A-9920-0270) XR20-W Mounting Ring Adaptor 150 mm
$425.00
XR20-W rotary axis calibrator and components | XR20-W mounting ring adaptor 150 mm