Planscheibein little used condition in wooden box
Manufacturer presumably Röhm
Diameter approx.610mm
Through hole approx. xxx mm
Short cone chuck flange for spindle heads DIN 55027 or ISO 702 / III (same as old standard DIN 55022) with stand-up bolt and nut nuts.
Short cone holder size 8 for bayonet closure
Cone-d2 139.735 mm