A: 

The sliding contact surface of plain bearings is an inner sphere and an outer sphere, which can rotate and swing at any Angle when moving. 

(1) GE...E type: single-faced outer ring, without lubricating oil groove. It can bear radial load and small axial load in any direction.

(2) GE...ES type: single-slit outer ring with lubricating oil groove. It can bear radial load and small axial load in any direction.

(3) GE...ES-2RS type, GEEW...ES-2RS type: single-slit outer ring with lubricating oil groove and sealing rings on both sides. It can bear radial load and small axial load in any direction.

(4) GE...ESN type: single-slit outer ring, GE...XSN type: double-slit outer ring (split outer ring), with lubricating oil groove, the outer ring with stop groove. It can bear radial load and small axial load in any direction. However, when the axial load is borne by the stop ring, its ability to withstand the axial load is reduced.

(5) GE...HS type: The inner ring has a lubricating oil groove, and the outer ring is double-half. The clearance can be adjusted after wear. It can bear radial load and small axial load in any direction.

(6) GE...DE1 type: the inner ring is hardened bearing steel, and the outer ring is bearing steel. When the inner ring is assembled, it is extruded and formed with lubricating oil grooves and oil holes. Bearings with an inner diameter of less than 15mm have no lubricating oil grooves and oil holes. It can bear radial load and small axial load in any direction.

(7) GE...DEM1 type: the inner ring is hardened bearing steel, and the outer ring is bearing steel. When the inner ring is assembled, it is extruded and formed. After the bearing is installed in the bearing seat, the end groove is pressed out on the outer ring to fix the bearing axially. It can bear radial load and small axial load in any direction.

(8) GE...DS type: the outer ring has an assembly groove and lubrication groove. Only limited to large-size bearings. It can bear radial load and small axial load in any direction (one side of the assembly groove cannot bear axial load).