In applications requiring control of torque or motion, engineers may rely on motors, clutches, brakes, or multi-part locking mechanisms to manage torque, control movement, or prevent backdriving. While proven, these solutions often introduce added complexity, size, and cost. In the right application, a wrap spring offers a fundamentally different approach: using geometry and friction to transmit torque, allow controlled slip, or lock motion instantly, all within a compact, passive mechanism. For engineers looking to simplify designs, reduce part count, or achieve smooth, zero-backlash performance without added systems or complexity, wrap springs present an often-overlooked alternative.
Reell designs and manufactures custom wrap springs engineered for consistent, repeatable performance in torque transmission and motion control. Unlike standard torsion springs, Reell designs precision wrap springs for your application. Our expertise ensures the spring tightly controls the grip, slip, or engagement with a shaft to deliver reliable performance, tight tolerances, and long service life in critical applications.
Have any questions about which precision wrap spring or product you need?
Every part of Reell precision wrap springs is intentional—from the tightly wrapped coils and high-tolerance shape engineered for performance to the durable materials and powerful gripping power. Adding Reell springs to your application ensures:
Reliable Gripping: Optimized for wrapping down firmly on a rotating shaft
High Tolerances: Industry-leading tolerances for consistent torque and engagement.
Excellent Performance: Works for a variety of applications in any industry
Long-Lasting Design: Quality materials customized for maximum longevity
Superior Reliability: Manufacturing process ensures substantially tighter results
Cinching Springs: Acts as a clutch between rotating input and output components
Slipping Springs: Provides a constant braking torque between rotating input and output components
Canting Springs: Provides a high linear locking force when loaded onto a rod
Round
Square
Rectangular
High carbon steel (including music wire)
Stainless steel
Since our products are universally used, Reell wrap spring clutches and slip devices solve motion problems in a variety of applications and industries
Paper handling applications such as printers, scanners, and franking machines
ATMs, cash counters, and other currency handling equipment
Agricultural seeders and precision dispensing systems
Automated safety and deployed systems, such as emergency lighting or automated air duct fire dampers
Reell’s industry-leading springs and precision wrap products offer trusted reliability, extended life cycles, and exceptionally tight tolerances in any industry.
Reell precision torsion springs are engineered to provide tight-tolerance torque and reliable torque transmission and engagement in wrap-spring clutches, braking mechanisms, and more.
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Wrap down and tightly grip a shaft that rotates in one direction
Maintain specific, consistent tension against a shaft, allowing controlled slipping as needed
Grip a shaft using a canting or titling motion, allowing free movement in one direction and acting as a brake in the other direction
Use the Reell selection guide to quickly find the right solution for your project.
Reell precision wrap springs are used across a wide range of industries where compact, reliable mechanical control of torque and motion is critical. They are particularly well-suited for:
Medical technology (surgical arms, hospital beds, patient handling equipment, device monitors): Enable smooth positioning with instant, reliable holding—often without motors or complex locking systems
Automotive interiors and exteriors (consoles, seating systems, access panels, engine components): Provide controlled motion, backdrive prevention, and consistent user feel in space-constrained designs
Office equipment (printers, scanners, monitors, ergonomic adjustments): Deliver quiet, precise movement and long-life performance in high-cycle applications
Aerospace and defense (flight control mechanisms, access systems, lightweight assemblies): Support compact, weight-sensitive designs requiring dependable, passive mechanical systems to control torque and position.
Use a wrap spring when you need compact, passive control of torque or motion without motors or complex assemblies. They are ideal for one-way rotation, torque limiting, or locking applications where space is limited and reduced part count, reliability, and zero-backlash performance are important.
The life of a precision wrap spring depends on application factors such as load, shaft material and finish, the operating environment, and duty cycle. If properly designed, wrap springs can achieve millions of cycles with consistent performance. Custom design, experience, and testing are used by Reell to validate product life based on the specific requirements.
Reell springs are precision, high-performance, not commodity, springs.
Because we design and manufacture our high-precision torsion clutch springs to have superior performance and meet tight tolerances, we use only high-quality materials and processes. Reell spring technology is often not a good fit for commodity or commercial tolerance products such as torsion springs, compression springs, extension springs, leaf springs, beam torsion bars, and wire forms.
A wrap spring grips a shaft through interference and friction. When torque is applied in the driving direction, the spring tightens (self-energizes), increasing radial force and torque capacity. This allows efficient torque transmission, controlled slipping, or locking depending on the spring design and application.
A torsion clutch spring is a type of precision wrap spring used specifically for torque transmission in rotary clutch applications. A precision wrap spring is a broader category of spring that grips a shaft to transmit torque, allow controlled slip, or lock motion in both rotary and linear designs.
Depending on your application’s shaft diameter, you can calculate the torque required. If you need help, ask an engineer or use any of our calculators to determine the correct torque for your application.
Reell uses three main types of torsion clutch springs for applications requiring control of torque, rotation, or linear motion: cinching grip clutch springs, slipping clutch, and canting grip linear clutch springs.
Cinching Grip Clutch Springs: Cinching grip happens when the spring is pulled tangentially around a hub OD or pushed tangentially inside a sleeve. Cinching grip springs are often used to provide a high torque in a small package that can be released while under load. Typical applications include electromagnetic, mechanical, and one-way wrap spring clutches.
Slipping Clutch Springs: Slipping happens when the spring is pushed tangentially around a hub OD or pulled tangentially inside a sleeve. Slipping springs are often used to limit transmitted torque or provide a constant braking torque. Typical applications include overload protection, friction hinges, paper separation rollers, and web tensioning.
Canting Grip Linear Clutch Springs: Canting grip happens when a spring around a shaft is pushed axially at a point on one end, creating a firm grip between the spring and the shaft. Canting springs are often used to provide infinite linear positioning on a rod. Typical applications include automobile seat positioning, mechanical clamping, and telescoping arms.
Reell is the trusted global partner for friction hinges, torque inserts, springs, clutches, and custom motion systems. Our components deliver premium movement and long service life across industries.
