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Low friction hub bearing improves performance and cuts energy consumption

26 January 2011

SKF has introduced any asymmetrical hub bearing unit that resolves the long standing issue of calliper piston knock-back on high performance cars, caused when cornering at high speeds or when driving on rough ground. The X-Tracker cuts wheel bearing friction by 25% compared with market benchmark ball bearing hub units. Equally, this reduces CO2 emissions by 1.3g/km for medium cars, according to the SKF Vehicle Environmental Performance Simulator based on the New European Driving Cycle (NEDC).

Based on a standard X-Tracker, the new hub bearing unit consists of a double row bearing arrangement in which the outboard row is at a higher diameter and contains more rolling elements than the inboard row. This unique asymmetrical design increases the load carrying capacity and operational life of each bearing, while significantly improving stiffness compared with traditional symmetrical hub units.

The low friction version has the same compact design as conventional units, with the dimensions and weight remaining unchanged compared with standard products. The new device is suitable both for new car designs as well as being suitable for retrofitting.

By combining the superior life and performance of the standard X-Tracker with newly optimised raceway geometry and friction optimised seals, this latest unit provides an excellent stiffness and life to friction ratio.

All versions of the X-Tracker wheel hub units contribute to improved driver performance, cornering and car stability across all types of vehicle, from family units to luxury performance cars.  Design variants are available to cover the complete light vehicle range.

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