Used and surplus machinery components for sale. MRO Exchange maintains a rotating inventory of mechanical machine components available for immediate purchase and fast nationwide shipping.

Every machine is an assembly of components working together to deliver motion, force, and precision. When one of those components fails or wears beyond service limits, the machine it drives stops producing until a replacement is found. For older machines where OEM replacement parts are discontinued, allocation-restricted, or priced at a premium through specialty channels, the surplus market is frequently the fastest and most cost-effective sourcing option available.

MRO Exchange sources and stocks surplus machinery components across gearboxes and speed reducers, rotary tables, spindle assemblies, linear motion components, and mechanical machine accessories. Our gearbox and speed reducer inventory is the deepest segment of this collection, with planetary gearboxes from B&R Automation, Neugart, Relex, Apex Dynamics, and Wittenstein alongside worm gear reducers from Boston Gear, Grove Gear, Sumitomo, and Atlanta. Rotary tables from Tsudakoma, W.B. Knight, and Dril-Quip cover CNC and manual indexing applications. Spindle assemblies serve CNC machine tool rebuilding and replacement applications where the spindle is the highest-precision component in the machine.

Who sources surplus machinery components through MRO Exchange:
Machine tool rebuilders sourcing mechanical components for legacy equipment restoration. Maintenance engineers replacing failed gearboxes and speed reducers on production machinery. OEM and custom machine builders sourcing cost-effective mechanical components for new machine construction. Facilities engineers extending the productive life of aging equipment without the capital cost of full machine replacement.

Every machinery component listed on MRO Exchange ships nationwide from our facility in Illinois at prices well below new OEM and distributor cost. Browse by component type above or scroll below to view our full current machinery components inventory.