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Bearings requiring maintenance must, due to the steel/steel or steel/bronze sliding contact surface, be lubricated. The lubricant reduces friction, decreases wear, increases the operating life and gives protection against corrosion. When designing the bearing arrangement, it must be ensured that the bearing position is adequately provided with grease. The bearings are available as radial, angular contact and axial bearings
Radial spherical plain bearings
Radial spherical plain bearings comprise inner rings and outer rings with a steel/steel or steel/bronze sliding contact surface and are lubricated via the inner and outer ring. They can support radial forces, transmit motion and loads with low moment levels and thus keep bending stresses away from the adjacent structure. The bearings are particularly suitable for alternating loads with impact type and shock type stresses and can support slight axial loads in both directions. Sealed spherical plain bearings are protected against contamination and spray water by lip seals.
Angular contact spherical plain bearings
Angular contact spherical plain bearings comprise inner and outer rings with a steel/steel sliding contact surface. They can support not only radial forces but also higher axial forces, are suitable for alternating dynamic loads and are used, for example, as a plain bearing alternative to tapered roller bearings of series 320X to DIN 720, where loads in conjunction with small swivel angles would lead to rolling bearing damage. Angular contact spherical plain bearings transmit motion and loads with low moment levels and thus keep bending stresses away from the adjacent construction. They are intended for grease lubrication and are lubricated via the outer ring.
Axial spherical plain bearings
Axial spherical plain bearings comprise shaft and housing locating washers with a steel/steel sliding contact surface, can support axial forces and transmit support forces into the adjacent construction with low moment levels. They can be combined with radial spherical plain bearings of series E to ISO 12 240-1 in order to support radial forces. The bearings are lubricated via the housing locating washer.