What is a Helical Gear.
Helical gears are similar to spur gears except that their teeth are cut at an angle to the Bore (axis) rather than straight and parallel to the Bore like the teeth of a spur gear. The line of contact between two teeth is not parallel to the teeth but inclined. Helical gears are used increasingly often as power transmitting gears, since not only can they carry larger loads because of their lower dynamic load but also their noise and vibration levels in operation are lower compared with those of spur gears.
Helical gears can mesh in parallel or crossed orientations. The former refers to when the teeth on helical gears are parallel to the axis of rotation, while the latter refers to when the teeth are at an angle to the axis of rotation.
With a pair of Helical Gears, the teeth mesh gradually and at no time is the full width of any one tooth completely engaged.
This gradual engagement and release of the teeth eliminates much of the shock and jar associated with straight teeth when operating under heavy loads.
In addition to Steel and Cast Iron, we can also offer Helical Gears in a variety of other materials.