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Stainless steel Spacea series bearings equipped with Molded Oil solid lubricant from NSK have been specified to solve a problem of premature deep-groove ball-bearing failures at a petrochemical plant in Spain.

The bearings are directly in contact with water, hydrocarbons and particles in suspension from the production process and the ingress of these contaminants was causing the original bearings to fail within a year.

To solve the problem, NSK’s engineers recommended the Spacea bearings with DDU-type contact seals to deny contaminant ingress. To ensure effective lubrication under extreme working conditions, Molded Oil was recommended.

The bearings specified for this application are manufactured with outer and inner rings and balls of Martensite stainless steel for maximum corrosion resistance.

Key benefits of product application

  • The Spacea bearings have reduced unplanned maintenance and production downtime.
  • They are providing high performance and reliability under demanding operating conditions.
  • The Molded Oil bearing lubricant is said to be ideal for water- and dust-contaminated environments.
  • To date, the bearings have performed for more than one year without problems, exceeding the bearing life originally targeted.


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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