Abstract: An apparatus for supporting a ring piece being cut from a ring-shaped structure is disclosed. The ring support member or assembly includes a bar assembly having a convex arcuate surface adapted to be disposed against and aligned with an inner circumferential portion of the ring-shaped structure. In addition to the convex arcuate surface, the bar assembly has a pair of substantially parallel faces which are substantially perpendicular to the convex arcuate surface. A supporting stud extends substantially perpendicularly through the faces of the bar assembly. A first clamping assembly is attached to one end of the supporting stud to fix the bar assembly to the supporting stud. A second clamping assembly is attached to the other end of the supporting stud and is adapted to fix the bar assembly and the supporting stud to an object, such as a plate with elongated radially disposed slots.