Used and surplus gearboxes and speed reducers for sale. MRO Exchange carries one of the deeper rotating selections of surplus gearboxes available for immediate purchase and fast nationwide shipping.
Gearboxes and speed reducers are the mechanical interface between a motor and the load it drives. They reduce the motor's output speed to a practical working speed while multiplying torque proportionally, and they do it continuously under load in some of the most demanding mechanical environments in manufacturing. When a gearbox fails the equipment it drives stops, and finding a direct replacement or compatible substitute quickly is the priority.
The surplus gearbox market covers two distinct buyer situations. The first is direct replacement — a specific gearbox model has failed and the buyer needs that exact unit or a confirmed compatible substitute to restore the machine. The second is new application sourcing — a machine builder, systems integrator, or automation engineer needs a gearbox with specific ratio, torque, and mounting characteristics and the surplus market offers a cost-effective alternative to new distribution pricing.
MRO Exchange carries surplus gearboxes and speed reducers across two major categories. Planetary gearboxes from B&R Automation, Neugart, Relex, Apex Dynamics, and Wittenstein serve precision servo and automation applications where high torque density, low backlash, and compact envelope are required. Worm gear reducers from Boston Gear, Grove Gear, Sumitomo, and Atlanta serve general industrial applications where high reduction ratios and right-angle output are needed at moderate torque levels. Sumitomo Cyclo speed reducers bridge the two categories, offering the high reduction ratios of a worm reducer with the durability and efficiency of a cycloidal drive mechanism.
Selecting a replacement gearbox or speed reducer:
Gear ratio must match the required output speed for the driven equipment. Output torque rating must meet or exceed the load with appropriate service factor applied. Mounting configuration, whether foot mount, flange mount, or shaft mount, must match the existing installation. Input shaft configuration must be compatible with the motor being connected. For servo applications, backlash specification and torsional stiffness are critical parameters that must match the motion system requirements.
Every gearbox and speed reducer listed on MRO Exchange ships nationwide from our facility in Illinois at prices well below new distributor cost.
