High-speed, Easy-to-handle, Long-life Ball Bearings from NSK

Applications that demand high running speeds, easy handling and long service life will benefit from NSK’s new four-point contact ball bearings. The innovative 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.

Among many notable features, 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 (split along a plane perpendicular to the shaft centre), to promote easy handling.

To meet the challenges of demanding applications, NSK QJ 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.

Another major advantage is the compact size of the QJ series. A single QJ unit can replace a face-to-face or back-to-back arrangement of conventional bearings, saving valuable design space.

Among a myriad of applications set to benefit are 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 the added value these bearings provide.

The added value stems from many factors, not least the decades of experience and expertise that NSK applied in the creation of a special internal design complemented by a precision-machined brass cage. This combination delivers increased limiting speed, high dimensional and running accuracy (P6), and a narrow axial clearance range. Additional advantages include reduced heat generation, vibration and noise.

NSK Europe

NSK Europe Ltd. is the European organisation of the Tokyo-based bearing manufacturer NSK, which was founded in Japan in 1916 and today employs nearly 30,580 people in its worldwide operations. The products and solutions provided by the industrial and automotive supplier can be found wherever things move. In addition to nearly all types of rolling bearings, the company’s portfolio includes housed bearings, linear technology, wheel bearing units, transmission and engine bearings and steering systems. The company is oriented to perfection in all of its business activities. Its aim is quality leadership in its industry, which it strives for through a continuous process of improvement, excellent product development, optimised production processes and customer-oriented service processes. In fiscal year 2021, the more than 4,250 employees of NSK Europe Ltd. generated sales of over € 818 million.