Vehicle Sway Bar Bushings - Polyurethane
A sway bar bushing, is the component that connects the sway bar, to the vehicle's chassis. The sway bar bushing is vital to the sway bar's function, and the bushing allows the sway bar to "float" and react to changing road conditions effectively. There are two bushings used on each bar, and they are located at either end of the chassis, on the lower control arms. Using a bushing, as opposed to the sway bar being bolted to the frame, makes for a smooth connection, which allows the weight generated by the body of the vehicle, during turning, to shift. Sway bars, and sway bar bushings, are typically located on the front chassis, however, they are installed on the rear chassis on some high performance vehicles.
Polyurethane is the most common material used to make sway bar bushings, however, rubber is sometimes used. These materials are used due to their ability to resist extreme hot and/or cold temperatures, and also resist friction created as the bar continually rotates in the bushing. The sway bar fits into the center of the bushing, and is supported, and encased by the polyurethane or rubber. The outside of the bushing consists of a metal casing, which has brackets, which allow the bushing to be easily mounted to the chassis. The metal casing and brackets are typically plated in order to avoid rust, and excessive wear. The size of the bushing, and the hole in the center varies, depending on the thickness of the sway bar. Smaller cars have thinner sway bars, while heavy duty vehicles may have thicker sway bars up to 2 inches thick.
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