The IronHorse worm gearbox line now includes left-hand-shaft models in four frame sizes and six gear ratios from 5:1 to 60:1. The gearboxes (worm gear speed reducers) are mechanical power transmission drive components that can drive a load at a reduced fixed ratio of the motor speed. Constructed of cast-iron one-piece housings, the worm gearboxes feature a C-flange input. Designed to change drive direction by 90° and to increase torque output, worm gearboxes are used when space is at a premium or to simplify mechanical design. These gearboxes are mountable in any direction, except motor pointing up.