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Gear Classification Introduction
Nov 16, 2018

The gears can be classified according to the tooth shape, the gear shape, the shape of the tooth line, the surface on which the teeth are located, and the manufacturing method.

The tooth profile of the gear includes a profile curve, a pressure angle, a tooth height and a displacement. Involute gears are easier to manufacture, so in modern gears, involute gears are the absolute majority, while cycloidal gears and arc gears are less used.

In terms of the pressure angle, the load capacity of the small pressure angle gear is small; while the large pressure angle gear has a higher load carrying capacity, the load of the bearing increases under the same transmission torque, and therefore is used only for special cases. The gear height of the gear has been standardized, and the standard tooth height is generally used. The advantages of the displacement gear are numerous and have been used in various types of machinery and equipment.

In addition, the gear can also be divided into cylindrical gear, bevel gear, non-circular gear, rack, worm gear according to its shape; according to the shape of the tooth line, it is divided into spur gear, helical gear, herringbone gear, curved gear; The surface is divided into an external gear and an internal gear; according to the manufacturing method, it can be divided into a cast gear, a cut gear, a rolling gear, a sintered gear, and the like.

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