Cylindrical gears with teeth that are straight and parallel to the axis of rotation. Helical gears. Cylindrical gears with teeth at an angle to the axis of rotation.

Two gears can mesh without having a parallel axis, which puts the gears in the same plane. Shafts that intersect or are skewed can be used to change speed or torque, depending on the need.

The guide focuses on three types of gears: the spur gear with straight teeth parallel to the gear axis, the helical gear with teeth at an angle, and the herringbone gear, which combines two ...

These systems utilise an array of gear configurations – including planetary gear trains and parallel-axis gear pairs – to enable smooth, rapid shifts and to accommodate a wide range of torque ...

Eaton Detroit Truetrac differentials use a cool, patented design of parallel-axis planetary helix gears to provide a smooth division of torque to both rear wheels.