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  2. False brinelling - Wikipedia

    en.wikipedia.org/wiki/False_brinelling

    Almen found that wheel bearings were damaged before they were used by customers. Furthermore, he found that the bearings were more damaged for long-distance shipping of the cars and that the season of shipping also had an influence. The reason for the damaged bearings were micro-oscillations [17] which occurred due to the shipping. The small ...

  3. Rolling resistance - Wikipedia

    en.wikipedia.org/wiki/Rolling_resistance

    Wheel bearing rolling resistance is lowest with high axle loads and intermediate speeds of 60–80 km/h with a Crr of 0.00013 (axle load of 21 tonnes). For empty freight cars with axle loads of 5.5 tonnes, Crr goes up to 0.00020 at 60 km/h but at a low speed of 20 km/h it increases to 0.00024 and at a high speed (for freight trains) of 120 km/h ...

  4. Race (bearing) - Wikipedia

    en.wikipedia.org/wiki/Race_(bearing)

    In the case of ball bearings, the bearing has inner and outer races and a set of balls. Each race is a ring with a groove where the balls rest. Each race is a ring with a groove where the balls rest. The groove is usually shaped so the ball is a slightly loose fit in the groove.

  5. Bearing (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Bearing_(mechanical)

    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.

  6. Ball joint - Wikipedia

    en.wikipedia.org/wiki/Ball_joint

    In an automobile, ball joints are spherical bearings that connect the control arms to the steering knuckles, and are used on virtually every automobile made. [1] They bionically resemble the ball-and-socket joints found in most tetrapod animals. [2] A ball joint consists of a bearing stud and socket enclosed in a casing; all these parts are ...

  7. Rolling-element bearing - Wikipedia

    en.wikipedia.org/wiki/Rolling-element_bearing

    Most roller bearings only take radial or axial loads, but tapered roller bearings support both radial and axial loads, and generally can carry higher loads than ball bearings due to greater contact area. Tapered roller bearings are used, for example, as the wheel bearings of most wheeled land vehicles.

  8. Locking hubs - Wikipedia

    en.wikipedia.org/wiki/Locking_hubs

    Locking hubs, also known as free wheeling hubs are fitted to some (mainly older) four-wheel drive vehicles, allowing the front wheels to rotate freely when disconnected (unlocked) from the front axle. This is done to reduce the mechanical resistance of the front-portion of the drivetrain when four-wheel drive is not in use. [1]

  9. Wheel bearing - Wikipedia

    en.wikipedia.org/wiki/Wheel_bearing

    Wheel bearing may refer to: Ball bearing; Bearing (mechanical) Fluid bearing; Jewel bearing; Journal bearing; Needle roller bearing; Plain bearing; Rolling-element ...

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