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Helical Gears

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A kind of cylindrical gear that has teeth bent into a helix shape is called a helical gear. In contrast to spur gears, a properly constructed helical gear may have a greater average connection ratio, which can lessen noise and vibration. When used as power transmission mechanisms, helical gears primarily serve to increase torque and reduce speed between rotating shafts. They can be broadly split into two types: those that transmit energy between parallel parts and those that do not, often presented as cross-axis gears, and transfer energy between non-parallel parts. Read More…

Helical Gears Helical gears are circular in shape with teeth that have been cut in a helical path at an angle relative to the gear's axis of rotation. Helical gears can also be aligned parallel or crossed, allowing gears to transmit torque perpendicularly.
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Leading Manufacturers

Joliet, IL  |  800-876-7216

Omni G & M Corporation is a leading gear fabricator specializing in precision machined and custom solutions in a variety of sizes and types. Please check out Omni G & M’s website or call a friendly personnel member today!

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Omni Gear & Machine Corporation $$$

East Walpole, MA  |  800-491-1073

Gears are what we do best, and we are experts in our field. We have three generations of experience backing our company, and we use all of it to benefit you in any way possible.

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Commercial Gear & Sprocket Company, Inc. $$$

Syracuse, NY  |  315-488-0100

Gear Motions is a leading gear manufacturer specializing in supplying custom cut and ground gears. Our wide range of precision gear manufacturing capabilities and services deliver quality gears to meet almost any application.

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Gear Motions, Inc. $$$

King of Prussia, PA  |  800-766-5120

A gear manufacturer with 100+ years of experience producing, repairing and rebuilding gear drives, helical gears, planetary gears, spiral and straight bevel gears, spur gears and power transmission solutions used by cement, mining, paper, power generation and other industries. Coast-to-coast service centers.

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Philadelphia Gear $$$

Eastlake, OH  |  440-946-4327

Federal Gear and Machine offers industrial gears, spur gears, helical gears, worm gears, internal gears, external and bevel gears. We are fully integrated to serve the industrial gear needs of companies throughout the United States and Canada with quality and reliability.

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Federal Gear and Machine $$$

Cleveland, OH  |  800-423-3169

Cleveland Gear Company has specialized in worm gear technology including industrial gears, helical gears, worm gears and precision gears since 1912. Applications include steel production, electric power generation, and material transport. Fulfilling your exact requirements is what has and continues to make Cleveland Gear one of the top manufacturers of gearing and enclosed gear drives.

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Cleveland Gear Company $$$
placeholder image Omni Gear & Machine Corporation Commercial Gear & Sprocket Company, Inc. Gear Motions, Inc. Philadelphia Gear Federal Gear and Machine Cleveland Gear Company

While a helical gear is cut at an angle to the circulation of the gear blank, it has the same involute tooth shape as a spur gear in section view. The helix angle is the name given to this angle.

Helical Gears

Types of Helical Gears

Double helical gears

Double helical gears are sometimes used to neutralize or offset the forces required to overcome axial thrust. The hands are in opposition, but the helix angle is the same, and the entire face is divided into two equal halves. Because the axial thrusts are opposed, the forces are contained in the gear and are not transmitted to the bearing. Advantages include a high loading capacity and dependable transmission. Due to their advantages, double helical gears are often employed in gas turbines, generators, prime movers, pumps, fans, and compressors in nautical ships and construction machinery.

Double Helical Gear

Herringbone Helical Gear

A particular kind of double helical gear is a herringbone gear. The herringbone gear has two sets of teeth—one set on the right hand and one on the left hand—on a single gear. The thrust of one set of gear teeth cancels out that of the other when there are two sets. Each of this gear's spiral grooves, visible from the top, resemble the letter V, creating a herringbone pattern. Due to their pattern, herringbone gears do not produce a further axial load.

Herringbone Gears

Helical Rack and Pinion

The spinning motion of the circular pinion is converted into linear motion at the rack by a special sort of linear actuator known as a helical rack and pinion. Despite the fact that a rack is simply a straight bar with gear teeth, it may also be thought of as a component of a gear with an unlimited radial range. For linear motion involving movement lengths more than 2 meters, helical racks and pinions are an affordable option. When coupled, they convert rotational motion into linear motion. When the pinion is rotated, the rack is driven in a straight path. On the other hand, the pinion will rotate if the rack is shifted linearly.

Rack and Pinion

Bevel Helical Gears

Helical bevel gears are angular gears with the drive shaft of the gear unit rotating at 90 degrees with respect to the motor's rotor shaft, though they can also be configured to work at different angles. Shafts may be hollow or solid. Bevel gears are used for rotating a shaft in a different direction. Applications using angular geared motors should use gearboxes with helical bevel gears, which can provide high power density and output torque. A cone-shaped base at the device's edge houses the curved teeth that give bevel helical gearboxes their name.

This approach provides a stable and quiet operation by generating rotating motion amid non-parallel shafts. The spiral gear teeth interlock with other helical gears as is common. The contact gradually develops over the length of each tooth beginning at one edge of the gear.

Helical Bevel Gear

Applications of Helical Gears

  • Fast-moving industries: Helical gears are ideal for high-speed applications because they endure less wear and friction than conventional gears while having a significant force-transfer capacity.
  • Automotive sector: Helical-type gears used in the automotive sector are more robust than spur gears because they have more teeth that can mesh together to create a bigger surface area that can support the weight. As a result, heavy-duty automotive applications like gearbox operations are a great fit for helical gears.
  • Production Engineering: Due to their strength and endurance, helical gears are used in the machinery of the majority of production industries.

Benefits of Helical Gears

  • In comparison to other gear types, helical gears can withstand a greater torque shift. They accomplish this due to their symmetrical, well-designed gear teeth, which are good for tough jobs. In addition, helical gears have a greater strength output than spur gears. Helical gears may also handle higher loads than spur gears because the spiral gear tooth is bigger and diagonally positioned. In exchange for the same tooth size and equivalent width, helical gears are more robust.
  • They have a flexible and strong design. These gears may have parallel or perpendicular shaft couplings, depending on the function of the machinery. They enable machinery to be modified to meet particular needs, increasing productivity.
  • Helical gears and gearboxes are sturdy enough for high-load applications. The automotive industry can utilize them to transfer force and motion between shafts at a right or parallel angle.

Helical Gears Informational Video


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