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2. List of gear nomenclature - Wikipedia

   en.wikipedia.org/wiki/List_of_gear_nomenclature

   A face gear set typically consists of a disk-shaped gear, grooved on at least one face, in combination with a spur, helical, or conical pinion. A face gear has a planar pitch surface and a planar root surface, both of which are perpendicular to the axis of rotation. [ 1 ]

3. Spur gear - Wikipedia

   en.wikipedia.org/wiki/Spur_gear

   Spur gear. Spur gears or straight-cut gears are the simplest type of gear. They consist of a cylinder or disk with teeth projecting radially. Viewing the gear at 90 degrees from the shaft length (side on) the tooth faces are straight and aligned parallel to the axis of rotation. Looking down the length of the shaft, a tooth's cross section is ...

4. Gear - Wikipedia

   en.wikipedia.org/wiki/Gear

   Two intermeshing spur gears rotating at different velocity due to differing gear ratio. A gear [1] [2] or gearwheel [3] [4] [5] is a rotating machine part typically used to transmit rotational motion and/or torque by means of a series of teeth that engage with compatible teeth of another gear or other part.

5. 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°, ξ 1 = ξ 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.

6. Edwin R. Fellows - Wikipedia

   en.wikipedia.org/wiki/Edwin_R._Fellows

   Edwin R. Fellows (May 29, 1865 – May 21, 1945) was an American inventor and entrepreneur from Torrington, Connecticut who designed and built a new type of gear shaper in 1896 and, with the mentoring of James Hartness, left the Jones & Lamson Machine Company to co-found the Fellows Gear Shaper Company in Springfield, Vermont, which became one of the leading firms in the gear-cutting segment ...

7. Pancake (slot car) - Wikipedia

   en.wikipedia.org/wiki/Pancake_(slot_car)

   The power was carried by a chain of spur gears along the top of the chassis, to a pinion which drove a crown gear at the axle. Like most slot car motors, the Aurora pancakes ran on low voltage direct current. The term 'pancake' is also loosely used to refer to a car or chassis which has such a motor. Common Slot Car Motor Arrangements.