Opps! . . . I was thinking of the Nikon, Pentax, etc., bayonet lens mounts requiring a twisting motion. Totally forgot the term applied to the lathe tapered mounts I used years ago. Age and cross-culture technology. . . sometimes an unfortunate mix! LOL
Iím very interested in converting my screw thread Sheldon lathe so will be watching with interest. Many thanks for the dimensions.