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Contact Supplier1.Extension Spring:are wound to oppose extension. They are often fully compressed in the no-load position and have hooks, eyes, or other interface geometry at the ends to attach to the components they connect. They are frequently used to provide return force to components that extend in the actuated position.
2.Important parameters: outer diameter, wire diameter, and free length, design units,maximum load, the spring rate, and the extended length.
3.Common types of extension springs include drawbar spring, and constant force spring.
4.Common materials of construction for extension springs include stainless steel, high carbon steel wire, alloy steel, music wire