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Bearings requiring maintenance must be lubricated due to the steel/steel or steel/bronze sliding contact surface. 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 can be adequately supplied with grease. The bearings are available as radial, angular contact and axial bearings.
Radial spherical plain bearings comprise inner and outer rings with steel/steel or steel/bronze sliding contact surfaces 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 and shock type stresses and support low axial loads in both directions. Sealed spherical plain bearings are protected against contamination and water spray by lip seals.
Angular contact spherical plain bearings comprise inner and outer rings with steel/steel sliding contact surfaces. In addition to radial forces, they can also support axial forces, are suitable for alternating dynamic loads and 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 damage rolling bearings. Angular contact spherical plain bearings transmit motion and loads with low moment levels and thus keep bending stresses away from the adjacent structure. They are intended for grease lubrication and are lubricated via the outer ring.
Axial spherical plain bearings comprise shaft locating and housing locating washers with steel/steel sliding contact surfaces, can support axial forces and transmit support forces with low moment levels into the adjacent construction. In order to support radial forces, they can be combined with radial spherical plain bearings of dimension series E to DIN ISO 12 240-1. The bearings are lubricated via the housing locating washer.