Steven Levy Enterprises buys and sells new, unused, and used surplus gearboxes and power transmission speed reducers. Browse our inventory of used gearboxes and power transmission speed reducers available for purchase. Speed reducers are mechanical devices that help drive systems maintain optimal speed and torque for the application. Speed reducers also lower the speed of rotation of the input shaft by a certain ratio and increase the power transmitted to the output shaft by the same ratio. Tell us what surplus gearboxes and power transmission speed reducers you have for sale or call us at 713-910-4337.