POT Cum PTFE Bearings:- POT Cum PTFE Free Sliding Bearing:- Bears Vertical Load. Allows sliding movement in all directions. Allows Rotation in all direction. POT Cum PTFE Guided Bearing:- Bears Vertical Load Horizontal Load. Allows sliding movement in one direction. Allows Rotation in all direction. POT Fixed Bearing:- Bears Vertical Load Horizontal Load. Allows Rotation in all direction.