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Home » NSK Introduces New Bearings

NSK Introduces New Bearings

April 13, 2005
[photo] NSK's new BGR Series of super precision angular contact bearings combines the benefits of SHX heat and seizure resistant steel and ceramic balls to meet the high accuracy (ISO Class 2) and high-speed (up to 244,000 rpm) requirements of the internal grinding industry. The combination of special long life SHX steel and ceramic balls in the BGR design also ensure extra bearing life for users of grinding spindles. SHX steel is suited for use in machine tool spindles, which run at high speeds with a minimal supply of lubricant. According to NSK, the heat resistance is nearly equal to M50 steel, a material used in jet engines, while its wear resistance and resistance to seizure and durability are all superior. Building on special materials technology, the optimized BGR design integrates an outer ring guided cage for better lubrication and also has the shoulder of its inner ring relieved to ensure a stable oil supply into the bearings. Offering accuracy to ISO Class 2, the BGR Series bearings offer easy handling for the user as a result of their non-separable inner ring. NSK adds that this feature simplifies the spindle assembly and allows users to benefit from the ability to configure the BGR bearings in universal combinations of back-to-back (DB), single or tandem (DT), or face-to-face (DF) arrangements. Available in an ISO dimension series (10 and 19) and bore sizes from 6?25 mm, these bearings are offered with the choice of steel balls, ceramic balls or a combination of ceramic balls and SHX rings. Bearings are suitable for use with high-speed greases (up to 192,000 rpm with ceramic balls) and SHX material and oil-air lubrication systems. In the combination with ceramic balls and SHX rings, bearings were able to achieve their highest operating speeds (up to 244,000 rpm with a 6 mm bore bearing).
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