Lee Spring Company Datasheets for Constant Force Springs

Constant force springs are a variety of extension spring. A strip of steel with a preset curvature is coiled tightly so that each turn of the strip rests on its inner neighbor. The spring is actuated in a pulling, liner motion with the deflection resistance originating from the material's stiffness and spring construction. Unlike other extension springs, a consistent degree of force is exerted despite the degree of deflection.
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Product Name Notes
CFS-10
CFS-15
CFS-20
CFS-50
Constant Force Spring -- LCF 025 04 025S
Constant Force Spring -- LCF 025 05 031S
Constant Force Spring -- LCF 025 06 038S
Constant Force Spring -- LCF 025 06 050S
Constant Force Spring -- LCF 025 08 050S
Constant Force Spring -- LCF 025 10 063S
Constant Force Spring -- LCF 025 12 075S
Constant Force Spring -- LCF 025 12 100S
Constant Force Spring -- LCF 025 16 100S
Constant Force Spring -- LCF 025 20 125S
Constant Force Spring -- LCF 040 04 025S
Constant Force Spring -- LCF 040 05 031S
Constant Force Spring -- LCF 040 06 038S
Constant Force Spring -- LCF 040 06 050S
Constant Force Spring -- LCF 040 08 050S
Constant Force Spring -- LCF 040 10 063S
Constant Force Spring -- LCF 040 12 075S
Constant Force Spring -- LCF 040 12 100S
Constant Force Spring -- LCF 040 16 100S
Constant Force Spring -- LCF 040 20 125S
Constant Force Spring -- LCF 130 04 025S
Constant Force Spring -- LCF 130 05 031S
Constant Force Spring -- LCF 130 06 038S
Constant Force Spring -- LCF 130 06 050S
Constant Force Spring -- LCF 130 08 050S
Constant Force Spring -- LCF 130 10 063S
Constant Force Spring -- LCF 130 12 075S
Constant Force Spring -- LCF 130 12 100S
Constant Force Spring -- LCF 130 15 100S
Constant Force Spring -- LCF 130 20 125S
Constant Force Spring -- LCF 250 04 025S
Constant Force Spring -- LCF 250 05 038S
Constant Force Spring -- LCF 250 06 038S
Constant Force Spring -- LCF 250 06 050S
Constant Force Spring -- LCF 250 08 050S
Constant Force Spring -- LCF 250 10 063S
Constant Force Spring -- LCF 250 12 075S
Constant Force Spring -- LCF 250 12 100S
Constant Force Spring -- LCF 250 15 100S
Constant Force Spring -- LCF 250 20 125S
COMPRESSION SPRINGS are open-coil helical springs wound or constructed to oppose compression along the axis of wind. Helical Compression Springs are the most common metal spring configuration. Generally, these coil...