Product Description
What are extension springs?
Extension springs are close-wound helical springs designed to resist tensile loading. Hooks, loops, or custom end forms connect the spring to two components that move apart.
Working Principle
How this spring type works.
Pulling the ends apart twists the spring wire and increases the restoring force. Initial tension keeps the coils closed before extension, while wire size, coil diameter, active coils, and end geometry determine performance.
Key Features
Design characteristics.
- Built-in initial tension for positive return action
- Custom hooks, loops, threaded inserts, and formed ends
- Wide range of loads, travel, and installation lengths
- Compact solution for pulling and reset functions
Common Applications
Typical use cases.
- Doors, latches, pedals, and return linkages
- Automotive and motorcycle mechanisms
- Industrial equipment and guarding systems
- Fitness equipment, appliances, and agricultural machinery
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.