Product Description
What are constant force springs?
Constant force springs are pre-stressed strips of spring material wound into a tight coil. As the strip is extended from the coil, it produces a nearly constant linear force across a long working travel.
Working Principle
How this spring type works.
The strip is formed with a natural curvature and stored on a drum or mandrel. Pulling the free end progressively uncoils the strip while the material attempts to return to its original radius, creating a stable retracting force with minimal change over the designed stroke.
Key Features
Design characteristics.
- Nearly constant output force over extended travel
- Compact energy storage compared with long helical springs
- Custom strip width, thickness, coil diameter, force, and travel
- Single, tandem, back-to-back, and motor-spring configurations
Common Applications
Typical use cases.
- Retractable cables, hoses, displays, and safety guards
- Height-adjustable equipment and counterbalance systems
- Automotive seating, interior mechanisms, and access covers
- Medical devices, printers, appliances, and industrial handling equipment
Custom Spring Review
Need this spring type matched to your assembly?
Send the drawing, target force or torque, working travel, material preference, annual quantity, and validation requirements for a production-oriented review.