About Stieber
Stieber Overrunning Clutches & BackstopsRegal Rexnord
Stieber is the world's market-leading manufacturer of overrunning clutches and backstop systems, with over 75 years of precision engineering expertise in freewheel technology under the Regal Rexnord corporate umbrella. Founded in 1937 and headquartered in Germany, Stieber designs and produces highly specialized clutch mechanisms that enable one-way rotation in conveyors, pumps, rolling mills, textile machinery, and energy generation equipment—preventing backdriving and mechanical failure in demanding industrial environments.
The brand's core product portfolio includes self-contained roller freewheels (sealed, bearing-supported, ready to install) and built-in freewheels in roller, sprag, and wedge designs engineered to exact DIN and ISO standards. Stieber's freewheel mechanisms operate silently and without maintenance oil, making them ideal for high-speed and washdown applications where traditional backstop designs would require constant lubrication or fail prematurely.
Stieber's roller freewheels are available in multiple bore designs (tapered, parallel, solid shaft), with carrying capacities ranging from small fractional-horsepower shafts to heavy industrial drive lines rated for hundreds of kilowatts. Built-in freewheels integrate directly into customer-supplied housings, enabling OEMs and machine builders to design lighter, more compact assemblies without sacrificing load capacity or reliability.
As part of Regal Rexnord—a global leader in mechanical power transmission serving critical industries from renewable energy to food processing—Stieber benefits from world-class manufacturing, supply-chain partnerships, and technical support spanning six continents. The brand's freewheel catalog includes both standard off-the-shelf designs and custom engineering for specialized applications, with documented load ratings, torque limits, and installation procedures for each variant.
ChatMRO's AI instantly cross-references Stieber freewheel SKUs against your machinery's speed, torque, and bore-diameter specifications, surfacing the exact backstop model and supplier pricing in seconds—eliminating manual catalog searches and preventing costly downtime from undersized or incompatible clutch selection.
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Frequently asked questions
What is the difference between a self-contained freewheel and a built-in freewheel?
A self-contained freewheel is a sealed, preassembled unit with integral bearings ready to mount directly onto a shaft or into a housing, while a built-in freewheel is a bare mechanism designed to be press-fit or integrated into an OEM's custom housing or gearbox. Self-contained units (Stieber's standard catalog) reduce assembly time and are ideal for retrofit applications; built-in designs minimize overall assembly size and weight in OEM machinery.
How do I choose between a roller freewheel and a sprag freewheel?
Roller freewheels use rolling elements to engage and disengage, offering higher load capacity, lower torque loss, and smoother operation at high speeds—ideal for conveyors and pumps. Sprag freewheels (wedge-based) are compact, produce holding torque instantly, and work well at lower speeds in textile machinery and hoists; Stieber's catalogs specify maximum speed and torque ratings for each type, so matching your application's speed and load ensures reliability.
What bore designs does Stieber offer for standard freewheels?
Stieber's self-contained freewheels are available in tapered bores (for easy shaft mounting with minimal tooling), parallel bores (for fixed-position shafts), and solid-shaft designs (pre-installed on a defined diameter). Built-in freewheels accommodate OEM-specified bore geometries including flange mounts and custom keyway patterns; ChatMRO cross-references bore type to your machinery's shaft configuration.
Are Stieber freewheels maintenance-free?
Yes, Stieber's sealed roller and sprag freewheels require no lubrication, oil changes, or routine servicing under normal operating conditions, making them ideal for food processing, pharmaceuticals, and washdown environments where contamination or frequent cleaning is a concern. Built-in freewheels' maintenance needs depend on the OEM housing design, but Stieber's core mechanism remains sealed and oil-free.
What load ratings and speed limits should I check when selecting a Stieber freewheel?
Every Stieber freewheel carries a rated maximum torque (in Newton-meters), maximum speed (in RPM), and power capacity (in kilowatts), documented in the product datasheet. Exceeding these limits risks mechanical slippage, noise, or failure; ChatMRO's RFQ collects your machinery's torque and speed, then automatically filters Stieber's catalog to show only models with sufficient capacity and safety margin.