81122 Cylindrical Roller Thrust Bearing

The thrust bearing is made of needle roller and cage assembly (or cylindrical roller and cage assembly) thrust washer . The needle rollers and the cylindrical rollers are hold and guided by the thrust cages. By using with  thrust bearings washer , different bearing system will be formed. The bearing has a high load carrying capacity and high rigidity under a small space due to the high accuracy cylindrical rollers (needle rollers) has been used and th e length of the contact surfaces has been extended. Another advantage is, if the surfaces of the adjacent components (parts) can be appropriately used as the raceway surfaces, the washers can be left out, the design of the bearings will become compact.

As the exterior of the needle rollers and the cylindrical rollers are used as the contact surface, the edge stress can be reduced, the service life will be extended. The thrust bearing is made of needle roller and cage assembly (or cylindrical roller and cage assembly) thrust washer . The needle rollers and the cylindrical rollers are hold and guided by the thrust cages. By using  thrust bearings washer , different bearing system will be formed. The bearing has a high load carrying capacity and high rigidity under a small space due to the high accuracy cylindrical rollers (needle rollers) has been used and th e length of the contact surfaces has been extended. Another advantage is, if the surfaces of the adjacent components (parts) can be appropriately used as the raceway surfaces, the washers can be left out, the design of the bearings will become compact. As the exterior of the needle rollers and the cylindrical rollers are used as the contact surface, the edge stress can be reduced, the service life will be extended.

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Cylindrical roller thrust bearings are designed to accommodate heavy axial loads and shock loads. They must not be subjected to any radial load. The ends of the rollers are relieved slightly to modify the line contact between the raceways and rollers. This pre­vents stress peaksat the roller ends to extend bearing service life. 

Cylindrical roller thrust bearings are very stiff and require little axial space. They are separable, that means that shaft washer, housing washer, and cylindrical roller and cage thrust assembly can be mounted separately.

Cylindrical roller thrust bearings are manufactured with one or two rows of rollers . Bearings in the 811 and 812 series are mainly used in applications where thrust ball bearings do not have sufficient load carry­ing capacity.

Single direction cylindrical roller thrust bearings are available as single direction bearings and can accommodate axial loads in one direction only.

Double direction cylindrical roller thrust bear­ings can accommodate axial loads in bothdirections. They can be created by combining two cylindrical roller and cage thrust assem­blies and two bearing washers with an inter­mediate washer. Depending on the design, an intermediate washer can be shaft or housing centred.