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01/02/2006
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An asymmetrical wheel hub unit is being used in the USA on the Cadillac STS-V to enhance its cornering and stability characteristics.
SKF’s X-Tracker hub bearing consists of a double-row angular contact ball bearing arrangement in which the outboard row is at a higher diameter and contains more balls than the inboard row. This design increases the bearing’s load-carrying capacity and operational life while significantly improving camber stiffness compared with traditional symmetrical hub units.
Improving camber stiffness allows the brake rotor to tilt less during vehicle cornering. This reduces brake calliper piston knock back, allowing the driver to brake later, creating faster cornering speeds and reducing lap times during track testing. The new hub unit is also said to improve the precision with which the vehicle stability control system is executed due to the quick response of brakes after a cornering manoeuvre.
The hub units will be manufactured at SKF’s Airasca facility in Italy.
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Author
Roger Bishop
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Copyright European Automotive Design.
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