An axle is a small cylindrical rod or shaft that is used to rotate or turn a wheel in a watch or clock. It is usually connected to a wheel by a pin and is held in place with a pinion gear or a pivot. The axle is usually made of metal and can be used to carry power from a spring or motor to the wheel of the watch. Axles are an important component of a watch, as they are responsible for providing the precision and accuracy of its timekeeping.
