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The Pros and Cons of Helical Gears

August 23, 2021

Various industrial equipment uses extensive gear sets that provide power, torque, and dependability, on the basis of their function. While spur gears are the choice for simpler operations, helical gears are more useful where advanced gear designs are required. These gears can operate with high loads and ensure equal load distribution. 

Learn more about helical gears below



Smooth and Silent Gear Operation

Angled teeth have a larger contact ratio than square peg teeth. Thus, machines that use helical gears are far smoother and quieter in their operations.


High-Load Capability and Endurance

Helical gears have a higher number of teeth that are in close contact with their mated gears. Therefore, they wear out slower than conventional gears and efficiently accommodate high-load operations.


Evenly Distributed Load

All helical gears have well-balanced axes relative to the helix angle, which helps to evenly distribute the load. As a result, the gear has a longer lifespan than other gears carrying the same load level, such as those made by True Gear & Spline, the leaders in helical gear manufacturing.


Greater Power Transfer

Every helical gear can deliver sufficient parallel and straight angle power transfers thanks to the well-balanced axes and a higher tooth number.




Requires Special Thrust Bearings

Standard thrust bearings can wear easily due to a helical gear's exceptionally strong thrust along its gear axis. This is due to higher tooth slippage between mating gears, leading to a stronger axial thrust. As a result, it requires special and strong thrust bearings, especially for gears that take on higher loads.


Generates Substantial Heat

Axial thrust generates heat that damages gears without proper lubrication and design. As a result, helical gears have relatively low efficiency, unless a proper lubrication system is in place. 


Requires More Specialization 

A spur gear's simple design makes it easy, quick, and affordable to manufacture. On the other hand, helical gears are a bit more complicated to produce due to the angular nature of their teeth, which requires specialized tools and in turn, costs more to manufacture. 


Irrespective of your choice of gears, you can always count on us at True Gear and Spline to provide you with the best gears designed for your needs. Contact us today to learn more about our versatile range of products and services.