A bevel gear is a special type of gear whose tooth flanks are conical rather than plane parallel to the axis. It consists of one or more conical gears that mesh with each other to achieve rotational transmission. Bevel gears are mainly used in systems that require rotational transmission in the axial direction.
The standard definition of a Bevel Gear is a cone-shaped gear which transmits power between 2 intersecting axels.
Looking at bevel gears from the differences in helix angles, they can be generally classified into straight bevel gears, which do not have helix angles, and spiral bevel gears (including zerol bevel gears), which do have helix angles. However, because of the fact that manufacture facilities for straight bevel gears are becoming rare and the fact that straight bevel gears teeth cannot be polished, making spiral bevel gears which can be polished superior in terms of noise reduction, spiral bevel gears are likely to become more common in the future.
Bevel gears can be generally classified by their manufacturing methods, namely the Gleason method and Klingelnberg method, which each have differing teeth shapes, and presently most gears use the Gleason method. Incidentally, all gears manufactured by MANHOPE use the Gleason method.
Furthermore, there are also variations in gears in terms of teeth pitch (modules, etc.), whether polished or not, and materials used. For example in the case of materials, S45C of machine structural carbon steel, SCM415 of machine structual alloy steel and MC901 of engineering plastic, etc. are often used, and duracon, etc. are used for plastic molded parts.
The main advantage of bevel gears is that they allow for changes in the direction of rotation of the axes. For example, when the axes of the driving wheel and the driven wheel are not parallel, the bevel gear can convert the input rotation direction to the output rotation direction, and can adjust the output speed and torque by changing the gear bevel angle.
Bevel gears are widely used in various mechanical equipment and vehicles, such as automobile differentials, motorcycle transmissions, ship transmission systems, etc. They play an important role in applications where it is necessary to transfer the direction of rotation to different axes.
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