Right Angle Gearing

Right angle gearing can transmit torque and RPM at a 90-degree angle (turn the corner). The primary differences among right angle gearing types are in how the gear sets are cut, as well as the styles in various stages.

Regal’s right angle gearing offering is one of the broadest in the industry. This product family includes Hub City® bevel gear drives, HERA® helical-hypoid speed reducers, Browning® Series 3000 OtN helical bevel speed reducers & gearmotors, Grove Gear®, Hub City and Morse® worm speed reducers.


Regal offers a wide array of enclosed spiral or straight bevel gearing solutions with universal mounting for right angle transmission.

Straight bevel gears represent the simplest and most common form of bevel gear. They have straight teeth and are parallel to the generators of the cone. A straight bevel gear has a 10:1 ratio range. A straight bevel gear is approximately 96% efficient per stage.

Spiral bevel gears are a variation of straight bevel gears. They have curved oblique teeth on which contact starts at one end of the tooth and progresses smoothly to the other end. They produce less noise and vibration when compared to the straight teeth of a straight bevel gearbox. A spiral bevel gear has a 10:1 ratio range. Like the straight bevel gear, a spiral bevel gear is approximately 96% efficient per stage.




Regal offers helical bevel speed reducers and gearmotors which deliver an energy efficient and reliable gear train. Available in a wide variety of mounting arrangements and input options.

OtN helical bevel speed reducers and gearmotors feature high gear efficiency, longevity and are dimensionally & mechanically interchangeable with many major brands. They are available in a wide variety of mounting arrangements and input options.




An alternative to a worm gear is the hypoid gear. Hypoid gears may look similar to worm gears at a glance. But due to the materials used for construction and the difference in how hypoid gears interact, they therefore transmit torque differently. Hypoid gears can show an overall cost and efficiency advantage.

Regal offers a four sizes of energy-efficient helical hypoid drives that can provide bolt-in replacement for up to 12 sizes of worm speed reducers or functionally interchange to a wide variety of right angle gear drives.




Specify a HERA Gear drive with a premium efficiency Marathon Motor. Available from 1/4 HP to over 25 HP when specified with a Hub City HERA gear drive. Download native cad models of the complete motor and gear drive assembly.




Worm gears consist of a non-intersecting shaft with a spiral thread that engages with and drives a toothed wheel. Worm gears are typically comprised of a bronze wheel and a steel worm. On the bronze wheel, the dominating friction is sliding friction. The bronze works as a lubricant and has a smooth surface; thus, efficiency is improved. Worm gears typically have a 5:1 to 60:1 ratio range. The efficiency of a single worm set varies with ratio and speed; this efficiency can vary from 40 to 93%.

Regal offers a broad selection of right angle worm gear reducers that range from an industry interchange design with modular accessories to cast iron and aluminum designs. These products are intended for a wide variety of applications.





Worm gears are very popular, as they are economical when it comes to their cost-to-torque ratio. Because of their ability to create high reductions in single stages, they are preferred when space is limited and large gear reductions are needed.

An alternative to a worm gear is the hypoid gear. Hypoid gears may look similar to worm gears at a glance. But due to the materials used for construction and the difference in how hypoid gears interact, they therefore transmit torque differently. Hypoid gears can show an overall cost and efficiency advantage.

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