Powermatic 26 and 27 are vintage spindle shapers that are highly sought after by professionals woodworking shops and hobbyists. However the tabletop fixed big ring and its accessories are often missing from these machines.

The outer ring is essential to smooth and safe shaping operations.

Listed here include a tabletop outer fixed ring, barrel set screws (3X off), and bolts (3X off), manufactured by WGM Tool Works. The outer fixed ring is made of carbon steel. It fits Powermatic 26 and 27 shapers. See the attached part list drawing as a reference. 

The outer ring has an OD of 7" and an ID of 4.25", the same dimensions as the stock ring. The set screws allow for a height adjustment of the ring so as to be flush with the tabletop; the bolts fasten the ring to the shaper tabletop.