SKF Improves the Performance of Small Sealed Spherical Roller Bearings

SKF has upgraded a range of small size sealed SKF Explorer spherical roller bearings offering even lower friction, reduced operating temperatures, higher limiting speed ratings and reduced maintenance.

This range of small size sealed spherical roller bearings uses a novel seal design, given the designation ‘RS’, which reduces overall friction in the bearing by up to 20 percent. In representative running conditions, this translates into calculated annual energy savings of up to 292kWh. Moreover, reduced friction means they operate at lower temperatures, permitting maximum operating speeds up to twice those of the existing range of sealed SKF spherical roller bearings that the upgraded range replaces. Lower bearing operating temperatures extend the life of the bearing grease allowing lubrication intervals up to twice those of current designs and meaning many more applications can now be considered relubrication-free.

The new RS seal is designed to operate with an optimized lip pressure reducing seal friction by up to 50 percent. In addition, the outer ring groove has been redesigned for reliable sealing and secure retention. RS seals have a rubberised side face that resists scratches and corrosion more effectively than metallic designs.

Sealed spherical roller bearings are widely used in environments where there is a risk of water and/or particulate contamination. The seals resist ingress of contaminants, allowing the longevity of the lubricant to be exploited, extending bearing service life and reducing maintenance costs and downtime. The new RS range includes 37 sizes with outside diameters (OD) to around 180mm. This range of products replaces the current ‘CS’ seal design for these sizes and these will be introduced globally from September 2015 onwards.

SKF also offers an unmatched range of spherical roller bearings.