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A roller bearing between the axle hub and axle shaft ensures easy rotation of the non-drive wheels. On the axle side, it is mounted to the holding bracket from the chassis; on the disc side, the wheel is mounted to the bolts of the WHA. When replacing, a wheel hub assembly should be torqued to the vehicle's specifications to prevent failure.[1]

The hub assembly is located between the brake drums or discs and the drive axle. A wheel is bolted on it. Depending on the construction, the end of the hub comes equipped with the splined teeth. They mate the teeth on the axle shaft. The axle hub spins along with the wheels bolted to it and provide power to the wheels in order to rotate.

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A wheel hub assembly (WHA), also referred to as hub assembly, wheel hub unit, wheel hub bearing, is an automotive part used in most cars, passenger vehicles, and light and heavy trucks.[citation needed]

Universal Title Application (replaces the OS/SS-7, OS/SS-27, OS/SS-52, MVC-2, OS/SS-85C) [pdf] Attention Vehicle Dealers: When using this form, place your dealer tax stamp in the upper right side of the document (near the NJ state seal)

Wheel hub bearing are used at least since the 1930s when SKF designed a unit used on the Citroën Traction Avant car.[2] As of 2019 at least 90 million vehicles use SKF wheel hub bearings.[2]