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  2. Harley-Davidson Sportster - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Sportster

    Model KH and KHK 1954–1956: 888 cc side-valve engines, using the 45 model bore, but with the stroke increased to 4.5625" (115.89 mm). This was the only small twin with a stroke longer than 3.8125". The shorter stroke was otherwise universal to the entire 45/K/Sportster line from 1929 to the present (exception: XR750, XB9 Buell).

  3. Cycloid gear - Wikipedia

    en.wikipedia.org/wiki/Cycloid_gear

    A cycloidal gear is a toothed gear with a cycloidal profile. Such gears are used in mechanical clocks and watches , rather than the involute gear form used for most other gears. Cycloidal gears have advantages over involute gears in such applications in being able to be produced flat (making them easier to polish, and thereby reduce friction ...

  4. Toyota K CVT transmission - Wikipedia

    en.wikipedia.org/wiki/Toyota_K_CVT_transmission

    The benefit of this system is that traditional CVTs tend to have low efficiency in lower gear ratios, creating a moment of sluggishness when starting from a stop. [2] Since the belts in this CVT are handling a narrower band of ratios, belt angles and loads can be reduced, increasing shift speeds and offering a claimed 6% improvement in fuel ...

  5. Involute gear - Wikipedia

    en.wikipedia.org/wiki/Involute_gear

    Involute gear teeth are not precisely this shape, due to material allowances like fillets et cetera. The involute gear profile is the most commonly used system for gearing today, with cycloid gearing still used for some specialties such as clocks. In an involute gear, the profiles of the teeth are involutes of a circle.

  6. Differential (mechanical device) - Wikipedia

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

    The left sun gear (red) provides more resistance than the right sun gear (yellow), which causes the planet gear (green) to rotate anti-clockwise. This produces slower rotation in the left sun gear and faster rotation in the right sun gear, resulting in the car's right wheel turning faster (and thus travelling farther) than the left wheel.

  7. Strain wave gearing - Wikipedia

    en.wikipedia.org/wiki/Strain_Wave_Gearing

    Harmonic Drive SE strain wave gear set consisting of wave generator bearing (top left), flexspline cup (top right) and circular spline ring (bottom). Strain wave gearing (also known as harmonic gearing ) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage ...

  8. 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]

  9. ZF 8HP transmission - Wikipedia

    en.wikipedia.org/wiki/ZF_8HP_transmission

    The 8HP 70 transmission with the gearset 4 in 23-85-teeth-configuration was the pilot series and therefore without generation designation. It was first used in the BMW 7 Series (F01) 760Li, has a torque handling limit of 700 N⋅m (516 lb⋅ft), and weighs 87 kg (192 lb).