Helical Gears

Herringbone Double Helical Gear

Helical Gears are similar to spur gears in their construction but, unlike spur gears, helical gears are constructed with teeth twisting around the cylindrical gear body at an angle to the gear face. This angle is either right-hand or left-hand and each gear pair consist of a right-hand and left-hand gear with teeth of the same helix angle. Helical gears typically use parallel axes configuration with mating gears, however, with the right setup they can also be used to drive non-parallel, non-intersecting shafts. 

This gear type is capable of greater load capabilities than spur gears because of their angled design. The helical teeth engage with other gears differently than the straight teeth of spur gears. With a spur gear, the entire tooth is engaged at once, whereas with helical gears, as the gears come in contact with one another, there is a gradual increase in the level of contact between corresponding teeth. This gradual engagement results in less impact loading on the gear teeth with a quieter and smoother operation. Even though helical gears are capable of greater load capabilities, they operate with less efficiency than spur gears and costs more due to the complexity of tooth design. Helical gear tooth design produces axial thrust, which necessitates the employment of thrust bearings in any application which uses single helical gears. 

Helical gears are suitable for the same types of applications as spur gears because they are capable of handling high speeds and high loads.  Talk to us for all your helical gear needs, including double helical gears and herringbone gears (as per image).

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