Power Springs

Power springs work or function by tightly winding a strip of spring-tempered material onto an arbor housed within a circular case (keeper). When wound, the spring stores mechanical energy and releases it as torque when unwound.

As the spring unwinds, it expands toward the keeper’s maximum allowed curvature, delivering rotational force to the free-rotating portion of the assembly. This unique motion makes power springs ideal for controlled torque delivery in compact spaces.

John Evans’ Sons designs and manufactures high-performance power springs, also known as clock springs, for applications requiring reliable rotational energy storage.

We produce power springs from material as thin as .002″ to as thick as .080″, with widths ranging from fractions of an inch to multiple inches. Our team of expert engineers will work with you to deliver custom spring solutions that match your exact requirements.

John Evans’ Sons has been delivering precision spring solutions for over 175 years. Contact our engineering department today to discuss how we can help you optimize your power spring design for performance, efficiency, and durability.

- Read less