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  2. Involute gear - Wikipedia

    en.wikipedia.org/wiki/Involute_gear

    Meshing of two spur gears with involute external teeth. z 1 = 20, z 2 = 50, α = 20°, x 1 = x 2 = 0, ISO 53:1998. The lower (green) gear is the driving one. The line of contact, which is the locus of all teeth contact points, is shown in blue.

  3. List of gear nomenclature - Wikipedia

    en.wikipedia.org/wiki/List_of_gear_nomenclature

    Profile of a spur gear Notation and numbering for an external gear Notation and numbering for an internal gear. The tooth surface (flank) forms the side of a gear tooth. [1] It is convenient to choose one face of the gear as the reference face and to mark it with the letter “I”. The other non-reference face might be termed face “II”.

  4. Spur gear - Wikipedia

    en.wikipedia.org/wiki/Spur_gear

    Spur gears are excellent at moderate speeds but tend to be noisy at high speeds. [2] Spur gear can be classified into two pressure angles, 20° being the current industry standard and 14½° being the former (often found in older equipment). [3] Spur gear teeth are manufactured as either involute profile or cycloidal profile. When two gears are ...

  5. Profile angle - Wikipedia

    en.wikipedia.org/wiki/Profile_angle

    The same involute gear may be used under conditions that change its operating pitch diameter and pressure angle. Unless there is a good reason for doing otherwise, it is practical to consider that the pitch and the profile angle of a single gear correspond to the pitch and the profile angle of the hob or cutter used to generate its teeth.

  6. Pressure angle - Wikipedia

    en.wikipedia.org/wiki/Pressure_angle

    Pressure angles. Pressure angle in relation to gear teeth, also known as the angle of obliquity, [1] is the angle between the tooth face and the gear wheel tangent. It is more precisely the angle at a pitch point between the line of pressure (which is normal to the tooth surface) and the plane tangent to the pitch surface.

  7. Gear train - Wikipedia

    en.wikipedia.org/wiki/Gear_train

    A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [ 2 ]

  8. Differential (mechanical device) - Wikipedia

    en.wikipedia.org/wiki/Differential_(mechanical...

    Spur-gear differential. A spur-gear differential has equal-sized spur gears at each end, each of which is connected to an output shaft. [8] The input torque (i.e. from the engine or transmission) is applied to the differential via the rotating carrier. [8] Pinion pairs are located within the carrier and rotate freely on pins supported by the ...

  9. Gear manufacturing - Wikipedia

    en.wikipedia.org/wiki/Gear_manufacturing

    Gear manufacturing refers to the making of gears. Gears can be manufactured by a variety of processes, including casting , forging , extrusion , powder metallurgy , and blanking . As a general rule, however, machining is applied to achieve the final dimensions, shape and surface finish in the gear.

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