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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]
When the cost of repair becomes a significant percentage of the cost of replacement, it becomes economically favorable to simply order a replacement part. In such cases, the part is said to be "beyond economic repair" (BER), and the percentage associated with this threshold is known as the BER rate.
Unlike a kingpin, which requires an assembly in the center of the wheel in order to pivot, joints connect to the upper and lower end of the spindle (steering knuckle), to the control arms. This leaves the center section open to allow the use of front-wheel drive. Older kingpin designs can only be used in a rear-wheel-drive configuration.
A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.
The XR1200 was discontinued on the United States Market after 2012. For 2012, the XR1200X model had upgraded suspension front and rear. The bike has a measured HP of 79.26 hp (59.10 kW) (rear wheel) and 67.53 lb⋅ft (91.56 N⋅m) (rear wheel) and a top speed of 120.7 mph (194.2 km/h)and a wet weight of 580 lb (260 kg). [12]
Disc brake-equipped Dusters now had the more-common 5-lugs on a 4.5-inch wheel bolt pattern. All 340 and some 318 engine-equipped cars received the simplified 8.25-inch rear axle assembly (with wheel bearings riding directly on the axle shaft and endplay being taken by C-clips); these axles also featured the 5 on a 4.5-inch wheel bolt pattern.
[9] [10] In situation when one wheel has reduced grip (e.g. due to cornering forces or a low-grip surface under one wheel), an open differential can cause wheelspin in the tyre with less grip, while the tyre with more grip receives very little power to propel the vehicle forward. [11]
Although bearings tend to wear out with use, designers can make tradeoffs of bearing size and cost versus lifetime. A bearing can last indefinitely—longer than the rest of the machine—if it is kept cool, clean, lubricated, is run within the rated load, and if the bearing materials are sufficiently free of microscopic defects.