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Constant Force Springs

SPEC® Constant Force Springs are a special type of extension spring. The spiral construction allows for near constant rate over the working extension. Mounting is generally achieved with a drum tightly fitted to the ID of the spring. The hole in the free end allows for easy mounting to your application. Additional flexibility in load is achieved with tandem or back-to-back configurations using more than one constant force spring. Be sure to keep 1.5 coils of material coiled at full extension. Material is stainless steel type 301 and parts are supplied with a plain finish. For terminology explanations, see our FAQ. Should you need a different configuration, finish, or complete assembly, please see our Engineered Solution Services

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