Gearboxes: Basic Functions

Gearboxes can provide 3 basic functions:

Change torque and speed

Change axis of motion

Convert rotary to straight line motion

Gearboxes Gearboxes Gearboxes

Major application of gears is to change the motor high speed / low torque to low speed / high torque usually required by applications.

High Speed / Low Torque


Low Speed / High Torque

Torque Tgear = Tmot • ratio • η (η …gear efficiency)

Speed ngear = nmot / ratio