Helical Gear

Helical Gears: In an effort to reduce the noise from spur gears, helical gears can be utilized. The teeth of helical gears are cut at an angle to the face of the gear so that the tooth engagement begins at one end and gradually transfers to the rest of the tooth as the gear rotates. This design leads to noise reduction and an overall smoother system. The helical pattern of the gears creates a thrust load as the gear teeth come into contact with each other at an angle that is not perpendicular to the shaft axis. Bearings are often incorporated into mechanisms with helical gears in order to support that thrust load.