Custom Power Springs Manufacturer
Flat spiral springs engineered for controlled torque, compact energy storage, and long cycle life
What Is a Power Spring
Precision-engineered flat spiral springs that store energy efficiently and deliver controlled rotational force across extended angular travel
A power spring is a flat strip of spring steel wound into a tight spiral that stores mechanical energy and releases it through controlled torque output.
Nearly constant torque output throughout the working stroke, with customizable torque curves to match your specific application requirements
Long angular travel capability allows multiple rotations while maintaining consistent performance, ideal for rewind mechanisms and clock movements
Compact envelope design maximizes energy storage in minimal space, reducing overall product footprint without compromising functionality
Key Distinction: Power springs deliver rotational torque for energy storage applications, while constant force springs provide linear pulling force. The fundamental difference lies in output motion and force profile.
Verify if power springs match your torque and rotation requirements
Consult Our EngineersPower Spring vs Constant Force Spring
Understanding the critical differences prevents costly misapplication and ensures optimal performance in your mechanism
| Characteristic | Power Spring | Constant Force Spring |
|---|---|---|
| Torque Output | Delivers rotational torque, customizable from rising to flat curves depending on coil geometry and pre-stress | Provides linear pulling force that remains nearly constant throughout extension range |
| Stroke / Rotation | Multiple rotations possible (often 5-50+ turns), ideal for winding mechanisms requiring extended angular travel | Linear extension from inches to feet, suited for straight-line retraction or counterbalancing applications |
| Energy Storage | High energy density in compact spiral form, excellent for spring motor applications requiring sustained torque delivery | Moderate energy storage across linear stroke, optimized for counterbalancing weights or maintaining tension |
| Typical Use Cases | Clock mainsprings, retractable cord reels, automotive seat mechanisms, mechanical timers, toy wind-up motors | Window shade retractors, vacuum cleaner cord reels, counterbalance systems, conveyor tensioning, display retractors |
Power Spring: Rotational Torque Application
Constant Force Spring: Linear Extension Application
Still uncertain which spring type fits your mechanism? Let our engineering team analyze your requirements
Request Technical ConsultationWhere Power Springs Are Used
From precision timepieces to automotive safety systems, power springs drive critical mechanisms requiring reliable rotational energy storage
Clock & Timer Mainsprings
Provides consistent torque delivery over extended periods, ensuring accurate timekeeping in mechanical clocks, kitchen timers, and industrial timing devices where battery power is impractical or unwanted.
Retractable Mechanisms
Powers smooth, controlled retraction in cord reels, badge holders, and tool tethers. Maintains consistent rewinding force throughout the extension range, preventing tangling and ensuring reliable return.
Automotive Energy Storage Components
Stores energy for seat recline mechanisms, seatbelt pretensioners, and headrest adjustment systems. Delivers precise torque control essential for passenger safety and comfort functions.
Seat Belt Return Systems
Ensures reliable webbing retraction in vehicle seatbelt systems. Must meet stringent safety standards for torque consistency and cycle life, operating flawlessly across temperature extremes.
Small Motor & Actuator Assist
Assists electric motors during startup or provides backup power when electricity fails. Reduces peak current draw and extends motor life in battery-powered devices.
Mechanical Counters & Rewind Devices
Drives counting mechanisms in utility meters, industrial machinery, and measuring instruments. Provides reliable rotational energy without external power requirements.
Don't see your specific application? We've likely engineered power springs for similar mechanisms
Discuss Your ApplicationFrequently Asked Questions
Engineering answers to common power spring specification and manufacturing questions
Can torque be customized?
Yes. Torque output is customized by adjusting material thickness, strip width, number of coils, and pre-stress levels. We engineer torque curves ranging from rising to nearly flat profiles, matching your exact load requirements. Provide your target torque range and rotation angle for precise specification.
What's the difference between power spring and constant force spring?
Power springs deliver rotational torque for multiple-turn energy storage (clocks, rewind mechanisms), while constant force springs provide linear pulling force over extension distance (retractors, counterbalances). The key distinction is motion type: rotation vs. linear extension.
What's the typical lead time?
Sample lead time: 7-10 business days after drawing approval. Production orders: 3-4 weeks for standard volumes (1,000-10,000 pieces), longer for high-volume orders or specialized materials requiring custom tooling. Rush service available for urgent projects.
What is the minimum order quantity?
For prototyping and validation: 10-50 pieces. Production MOQ: typically 1,000 pieces per specification. Lower quantities possible for complex custom designs requiring significant tooling investment. Contact us to discuss your specific volume requirements.
Do you offer confidentiality and NDA protection?
Yes. We routinely sign NDAs for proprietary designs and maintain strict confidentiality for all customer projects. Your drawings, specifications, and application details are protected. We can execute your NDA or provide our standard confidentiality agreement.
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