Shaft mounted speed reducer gear box is mounted directly on the driven shaft and doesn't need its own foundations. It offers a very practical way to reduce speed. This product is mainly applicable for enhancing the quantity of usable work by multiplying the torque produced by an input power source. In addition to this, the said product lowers the input power source speed for attaining desirable output speeds. Shaft mounted speed reducer gear box is also combined with a belt drive system for easily scaling down motor speeds by more than 150 times. The Challenge range can handle torque from 193Nm up to 5589Nm at 100 rpm.