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NSK has developed a shielded, double-row angular-contact ball bearing for industrial water pumps used for water supply and sewage, irrigation and various water service systems.

Product features include improved axial load-carrying capacity and longer service life, which increase reliability and decrease operating costs for water pumps.

According to NSK, industrial water pumps are expected to be highly efficient and reliable, while reducing environmental impact.

For this reason, NSK designed its water-pump bearing to provide both compactness and greater load-carrying capacity.

The bearing has dimensions (bore and outside diameter, and width) compliant with ISO standards and has a life up to three times longer than the conventional product, due to the optimised shielded design.

NSK claims the bearing also has up to three-times greater axial load-carrying capacity and an expanded operating temperature range, up to a maximum of 150C.

The bearing offers reduced operating costs, as it allows water pumps to be downsized.

It allows for longer periods between pump maintenance, due to offering a longer bearing life at the same bearing size.

The grease-filled bearing also provides for improved water pump reliability, due to its ability to withstand high motor temperature.


NSK, a global leader in motion and control products, has developed and continuously upgrades four core technologies: tribology, material engineering, analysis technology and mechatronics, to provide the platform for the company’s innovative product developments. This technology platform provides the basis for the design of NSK’s rolling bearings, automotive components and precision parts. In addition, by integrating these advanced technologies, NSK is able to respond quickly and effectively to customer requirements across all key sectors.

NSK is a driver of new technology developments, with a full line-up of products spanning general industrial, automotive and precision parts industries. These include bearings for mechanical and electrical machinery, IT and aftermarket; innovative automotive products such as electric power steering (EPS) automatic transmission components, steering columns and other steering related products; and precision linear motion components such as linear guides, ballscrews, X-Y tables, mechatronic products and Megatorque motors.

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