Self-lubricanting Radial Spherical Plain Bearings

Spherical plain bearing is a special type of plain bearing, also known as spherical plain bearing.Its structure is simpler than a rolling bearing,it is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, it can withstand large loads.According to its different types and structures, it can bear radial load, axial load or radial and axial combined load.Due to the composite material inlaid on the outer spherical surface of the inner ring, the bearing can produce self-lubrication during operation. It is generally used for low-speed swing motion and low-speed rotation, and can also be tilted within a certain angle range. When the support shaft and the shaft housing hole have a large concentricity, it can still work normally. Self-lubricating spherical plain bearings are used in industries such as water conservancy and professional machinery.


Operating temperature

The allowable operating temperature of the joint bearing is mainly determined by the paired materials between the bearing sliding surfaces, especially the plastic material sliding surface of the self-lubricating articulated bearing, and its bearing capacity will decrease at high temperatures. For example, when the material of the sliding surface of the lubricating spherical plain bearing is steel / steel, its allowable operating temperature depends on the allowable operating temperature of the lubricant. However, for all lubricated and self-lubricating spherical plain bearings, they can be used in the temperature range of -30 ° C to + 80 ° C and maintain the correct bearing capacity.



The angle of inclination of a spherical bearing is much larger than that of a generally adjustable rolling bearing, and it is suitable for use in support parts with low concentricity requirements. The angle of inclination of an articulated bearing varies with the size and type of the bearing structure, the sealing device and the support form. The inclination angle of radial spherical plain bearings is 3 ° ~ 15 °



When assembling the spherical plain bearing series, it is necessary to keep the position of the split surface of the accidental ring in particular. In order to avoid the load acting directly on the split surface, it is necessary to maintain the split surface at right angles to the coincidence direction.


When the load and the speed of the swing motion are small, the oil-fed joint bearing can be operated without lubrication. However, in general, grease must be replenished regularly. During the initial installation and operation, it is recommended that the lubrication cycle be moderately shortened.

Oil-free spherical plain bearings can be used without lubrication. However, if lithium soap-based grease is added before the operation, the service life of the joint bearing will be extended even more. If grease is injected into the space around the bearing, the joint bearing will be more effective in preventing the intrusion of dust and foreign