Gear reducers, also known as speed reducers, are built to deliver the kind of reliability, durability, and performance that industrial operations depend on every day. They’re the quiet workhorses behind countless machines, helping power everything from manufacturing lines to heavy-duty equipment.

As a global leader in power transmission, Sumitomo Drive Technologies continues to raise the bar with smart designs and high-quality engineering that keep things moving smoothly.

So, what exactly is a speed reducer? It's a mechanical device that increases torque by reducing the speed of a power source, making the output more useful for industrial tasks. Choosing the right speed reducer comes down to your specific project and application needs.

Our gear reducers are built for the future—delivering power and performance where it matters most.

Large Industrial Gearboxes

Sumitomo's Large Industrial Gearboxes feature an easily accessorized and customizable standard line of cataloged speed reducers for your demanding heavy-industrial applications.

Bevel Buddybox® 4 Speed Reducer

The Cyclo® BBB4 combines the strength and flexibility of the Cyclo gear reducer and a single-stage right-angle spiral-bevel gearbox in a rugged right-angle gearbox design.

Our Best Selling Reducers

Fortress Stainless Steel Reducer

Stainless steel offers resistance to the most caustic environments, and the unique contour design reduces the build-up of bacteria in those hard-to-reach areas.