NSK launches QJ bearings30 January 2023

?NSK QJ bearings NSK QJ series four-point contact ball bearings can sustain significant axial loads in both directions

NSK has released four-point contact bearings that are said to benefit applications that demand high running speeds, easy handling and long service life.

The QJ series features a high-strength outer-ring-guided brass cage to facilitate extremely high speeds and improved running accuracy. Furthermore, a 35° contact angle helps to provide longer operating life thanks to the resulting high axial load capacity,

which in turn minimises the costs associated with downtime and maintenance.

The QJ series four-point contact ball bearings comprise an inner ring that splits into halves. Users can separate the outer ring of these advanced single-row angular contact ball bearings from the halves of the inner ring to promote easy handling.

According to NSK, the bearings are also able to sustain significant axial loads in both directions. As a result, the bearings are ideal for carrying pure axial loads, or combined loads where the axial load is high.

The compact size of the QJ series means that a single unit can replace a face to face or back to back arrangement of conventional bearings, saving design space.

The applications that are set to benefit include oil-free screw compressors, industrial

pumps, tractor transmissions, robot gearboxes and servomotors. Further applications in the

petrochemical, chemical and pharmaceutical industries can also take advantage of these bearings.


Operations Engineer

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