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  2. Plain bearing - Wikipedia

    en.wikipedia.org/wiki/Plain_bearing

    The design of a plain bearing depends on the type of motion the bearing must provide. The three types of motions possible are: Journal (friction, radial or rotary) bearing: This is the most common type of plain bearing; it is simply a shaft rotating in a hole. [3]

  3. List of railroad truck parts - Wikipedia

    en.wikipedia.org/wiki/List_of_railroad_truck_parts

    An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

  4. Bearing modulus - Wikipedia

    en.wikipedia.org/wiki/Bearing_modulus

    p = bearing pressure(N/MM2) For any given bearing, there is a value for indicated by C, for which the coefficient of friction is at a minimum. The bearing should not be operated at this value of bearing modulus, since a slight decrease in speed or a slight increase in pressure will make the part of a shaft or axle that rests on bearings operate ...

  5. Sommerfeld number - Wikipedia

    en.wikipedia.org/wiki/Sommerfeld_number

    Nikolai Pavlovich Petrov's method of lubrication analysis, which assumes a concentric shaft and bearing, was the first to explain the phenomenon of bearing friction.This method, which ultimately produces the equation known as Petrov's Law (or Petroff's Law), is useful because it defines groups of relevant dimensionless parameters, and predicts a fairly accurate coefficient of friction, even ...

  6. 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.

  7. Stave bearing - Wikipedia

    en.wikipedia.org/wiki/Stave_bearing

    A stave bearing is a simple journal bearing where a shaft rotates in a bearing housing. Rather than the usual arrangement where the fixed part of the bearing surrounds most of the circumference of the shaft in one or two pieces, a stave bearing uses a large number of axial staves to support the shaft. A large housing is made with grooves ...

  8. Crankpin - Wikipedia

    en.wikipedia.org/wiki/Crankpin

    This design was used in older or exotic V engines. Radial engines use a more complicated version of articulated connecting rods, where a single "master" connecting rod attached to the single crankpin (one for each row in multi-row designs), and smaller bearings for each of the corresponding cylinders machined into the big end of the master rod.

  9. Main bearing - Wikipedia

    en.wikipedia.org/wiki/Main_bearing

    Some small single-cylinder engines have only one main bearing, [citation needed] in which case it must withstand the bending moment created by the offset distance from the connecting rod to the main bearing. When describing a crankshaft design, the number of main bearings is generally quoted, as the number of crank pins is determined by the ...