General features
JMC spherical plains are sliding bearings consisting of an inner righ with a sphered outer surface(namely ball) and an outer ring with a sphered inner surface (namely housing). For GE and SB both the inner and outer rings are made from SUJ2(carbon bearing steel) which is heated, predcision ground and prosphate treated to minimize friction of contacting surfaces. in case of JS and JET the outer ring is manufactured from steel called SM45C (KS) or S45C(JIS) and the inner ring STB2(KS) or SUJ2(JIS). They are different from how to lubricate each other. For JETS both rings' materials are stainless steel. On the whole the spherical surface of the inner ring is polished and finished like a mirror and the outside diameter of the outer ring has low to high values to be inserted either a narrow or wide area.

Application
Our Spherical plain bearings are particularly suitable for the accommodation of heavy radial roads. They are generally used for bearing arrangements where there is a certain misaligment of the shaft in regard to the housing, or in which tilting or rotational, oscillatory motions with relatively slow sliding velocities occur. They can also carry a cerain amount of thrust in eigher direction.

Bearing types
Basically, there are two types, ranging from steel-on-steel types(or standard lubrication) to maintenance-free(or self-lubrication)types. Steel-on-steel spherical plain bearings have sliding contact surfaces of steel and are chiefly destined for applications involving heavy loads of varying direction or shock loads. On the other hand, maintenance-free spherical plain bearings are essentially intended for operaton at slow sliding speeds and for the accommodation of heavy loads of constant direction. The features of each type are as follows.