New Bearing Steels from NSK

December 31, 2003—The newest steels, "Z", "EP" and "SHX" from NSK provide spindle bearings with resistance to seizure and minimum levels of heat generation.

According to the company’s press release, these steels have reduced amounts of non-metallic oxide because of the clean steel making process.

"Z"steel is the company’s standard material of manufacture for the new angular contact and cylindrical roller bearings. Bearings made from this steel have 1.8 times longer service life than conventional vacuum degreased steel, according to the company’s press release.

The "EP" steel was made more reliable due to a new evaluation technique in which fewer large sized particles are removed than in vacuum arc remelted steel or the refined "Z" steel.

Lastly, the SHX steel integrates the operating stability and low heat generation of Z and EP steels. This steel can be used as a bearing material in motorized machine tool spindles where the possibility of bearing seizure exists.


NSK Corporation
NSK is a global manufacturer of bearings and other motion & control products. It operates 51 manufacturing facilities worldwide and 12 global technology centers of excellence that draw from world-leading industry knowledge and manufacturing experience. NSK's dedication to engineering innovation results in state-of-the-art products designed to improve performance and extend service life. NSK's unique Asset Improvement Program helps customers improve productivity and efficiency to significantly reduce operating costs. The company's industry and process-specific expertise and solutions are applied to identify and solve problems that are limiting productivity. This enables customers to achieve improved performance, enhanced competitiveness and increased profitability. ...Read more Or visit