Helical Gears

One’s teeth on helical gears are trim at an angle to the face of the apparatus. When two tooth on a helical equipment system engage, the contact starts at one end of the tooth and steadily spreads as the gears rotate, until the two teeth are completely engagement.

This gradual engagement makes helical gears operate a lot more smoothly and quietly than spur gears. For this reason, helical gears are found in virtually all car transmissions.

Because of the angle of one’s teeth on helical gears, they create a thrust load on the apparatus when they mesh. Devices that use helical gears possess Taper Lock Pulley bearings that can support this thrust load.

One interesting thing about helical gears is that if the angles of the apparatus teeth are right, they can be mounted about perpendicular shafts, adjusting the rotation position by 90 degrees.