Free Wheel Coupling

A free wheel coupling, also known as a freewheel or one-way clutch, is a mechanical device used to transmit torque in one direction while allowing free rotation in the opposite direction. It consists of two main components: an inner race and an outer race.

The inner race is typically connected to the driving shaft, while the outer race is connected to the driven shaft. Inside the coupling, there are a series of rollers or sprags that engage with the races. When torque is applied in the driving direction, the rollers or sprags lock and transmit the rotational force from the inner race to the outer race, allowing power transmission. However, when torque is applied in the opposite direction, the rollers or sprags disengage, allowing the driven shaft to rotate freely without transmitting any torque.

Free wheel couplings are commonly used in various applications where it is necessary to transmit power in one direction only, while allowing for free rotation in the opposite direction. Some common applications include bicycles, motorcycles, automotive starter motors, and certain industrial machinery.

Overall, free wheel couplings provide a simple and efficient solution for unidirectional power transmission, allowing for smooth operation and preventing damage to the system in case of reverse rotation.