Essentially a gear is a toothed wheel that is shaped and profiled to mesh with other gears. In closed contact, these are then used to create power transmission from one parallel shaft to another. Gears are generally classified by the position and type of the tooth designs and the shaft location. Spur gears are the most common type of gear. The teeth surfaces are parallel to the mounted shaft and spur gears can be designed to high precision standards. Other types of gear include helical gears, bevel gears and worm gears. Rack and pinion gears convert torque into linear force. The various types of gears offer different power transmission capabilities and directions in machinery and mechanisms, such as liner motion and transmission of power between parallel shafts or intersecting or non-intersecting shafts.

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  1. Bevel Gear
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    Bevel gears are gears that transmit motion between intersecting shafts. They come in two main types – straight bevel gears and spiral bevel gears. Straight bevel gears can have an intersecting angle of up to 180 degrees. Spiral bevel gears produce a smoother and quieter operation. Bevel gears with equally sized mating gears are referred to as mitre gears.

  2. Gear Racks
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    Gear racks are gearing mechanisms that enable rotary movement to be converted into linear motion. They work by rotating a parallel shaft. Gear racks can come with machined ends to allow gear racks to work in series, with a traversing pinion or a rotating pinion to facilitate use in various applications.

  3. Helical Gears
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    Helical gears feature helicoid teeth over which the load of the gears is distributed. This reduces wear on the gears. Helical gears are available in various configurations, such as double helical gears and helical gear racks. Helical gears are able to withstand higher loads than spur gears. In addition to this, helical gears are smoother and quieter in operation.

  4. Internal Spur Gears
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    Whereas external gears feature teeth cut into the outer surface of the cylinder or cone, internal spur gears place the teeth on the internal surface. Reverse directional movement is averted by internal spur gears. Internal spur gearing is useful in applications that feature gear couplings and planetary gear drives.

  5. Spur Gears
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    Spur gears are the most commonly used type of gear. Spur gears are slow speed gears that produce excellent performance in moderate-speed applications. Due to the high noise levels they create, they are less suited to high-speed applications. Linear shaped versions of spur gears are called rack and pinion gears.

  6. Worm Gears
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    Worm gears transmit power at 90°. Relative motion of worm gearing systems is through sliding motion rather than rolling motion. Worm gears produce smooth, quiet and vibration-free output and are useful in lifting, lowering and conveying applications, as well as various other types of machinery mechanisms.

  7. Other
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    Other products that didn't quite fit into any of the above categories.