Traction spring
constant-forcestainless steelpower

traction spring
traction spring
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stainless steel
power, for reels
Other characteristics


The NEG'ATOR constant force spring represents the most basic, yet most versatile, type of constant force extension spring. It is a prestressed flat strip of spring material which is formed into virtually constant radius coils around itself or on a drum. When deflected, the spring material straightens as it leaves the drum. This straightened length of spring actually stores the spring’s energy through its tendency to assume its natural radius. The Material For high quality force springs Hunter Spring supply constant force springs made from 301 High Yield Stainless Steel. Other materials including Elgiloy, Inconel, or high-carbon steel can be used upon request for custom applications. Key Features - Low force gradient over entire deflection range - Extremely long linear extensions possible - Maximum force generated at initial deflection - Permits smaller package size due to inherent compact size and light weight - A variety of materials can be used - Negative force or negative torque gradient achievable Standard or Custom Springs Hunter Spring can supply standard or custom constant force spring designs. Please click to view our Standard Spring Design Guides below. Fatigue Life 20,000 Cycles Minimum Fatigue Life 13,000 Cycles Minimum Fatigue Life 2,500 Cycles Minimum Our constant force springs can also be customized to have a negative force or negative torque gradient. For applications where limited space is a concern, springs can be wound together in a laminated assembly to multiply output force with minimal impact on spring size and fatigue life.


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