Needle roller thrust bearings
Description
Thrust needle roller bearings are a type of needle roller bearing with a cage. They are compact and offer large load capacity and high limiting speed. The two-piece cage, consisting of precision-pressed steel, guides the rollers accurately.
NIBL manufactures needle/roller thrust bearings in different constructional features. The rolling elements of a thrust bearing are retained and guided in radial pockets within the cage. The latter is itself retained in relation to the plate by means of a steel ring. This assembly of parts is easy to handle and install and provides a high axial load capacity whilst occupying minimal space.
The design of NIBL thrust bearings serves to reduce, to a minimum, the friction between the rolling elements and the cage that guides them. Given correct installation and adequate oil lubrication, the coefficient of friction will be between 0.003 and 0.004 for needle thrust bearings and between 0.004 and 0.005 for roller thrust bearings. The result is principally due to the design of the one piece steel cage which has a special curvature that guides the rolling elements by their ends along their centre-lines.
Thus, the loads imposed on the cage by the rollers cannot create components parallel to the axis of rotation and therefore no increase in internal friction is generated and correct operation without wear or overheating is ensured. In addition, this special curvature gives the steel cage great rigidity and being relatively thin provides maximum space for the lubricant. When the ring of rolling elements begins to rotate, it is automatically centered in relation to the shaft axis. Thus the thrust bearing does not need to be precisely centered by the incorporated plate. Hence it is possible to align the bearing (on the shaft or in the housing) allowing wide tolerances to be used and without surface hardening. This enables costs to be reduced.
Range
Series
Thrust Bearings :
AX Thin, AX Thick, ARZ, AXZ
Thrust Plates :
CP Thin, CP Thick
Min ID :- 5 mm
Max ID :- 240 mm
Min OD :- 13 mm
Max OD :- 300 mm
Cage Variants
1. Pressed Steel Cage