POT bearing
POT BEARING: The basic components of a pot bearing are a shallow cylinder, a pot, an elastomeric pad, a set of sealing rings and a piston. Pot bearings are fixed against all translation unless they are used with a PTFE sliding surface. The pot and piston are made from structural carbon steel, whereas the sealing ring is usually made of a single circular brass ring or a set of two or three flat brass rings. The brass rings are placed in a recess on the top of the elastomeric pad. Vertical load is carried through the piston of the bearing and is resisted by compressive stress in the elastomeric pad. The pad is deformable but almost incompressible and is often idealized as behaving hydrostatically, however, in practice; the elastomer has some shear stiffness. Deformation of the pot wall is a concern, since this deformation changes the clearance between the pot and the piston and may lead to binding of the bearing or to elastomer leakage. Rotation about any axis is accommodated by