Helical Geared Motor

Helical gears, while being more complex to make than spur gears, are much better suited for high-speed applications since the teeth engage more gradually than spur gears. Spur gears engage instantaneously along a line across the whole tooth, but helical gears engage at a point, develop into a line of contact, then separate at a single point of contact. This causes less noise mechanical shock in the tooth. The tooth shape of a helical gear is a segment of a helix, and their shaft axes can be oriented at any angle, though the contact area tends to be optimal when the shafts are parallel [2]. Thrust is generated along the shaft axis in helical gears, which has to be counteracted with thrust, taper, or spherical bearings.