What is Constant Force Spring?
A constant force spring is a specially designed flat spiral spring that delivers near-constant force during extension. With force variation within ±5%, it's widely used in seat belts, medical devices and roller shades.Stainless Steel Compression SpringsHelical,clockwork,Stainless Steel Constant Force Spring
Helical,clockwork,Stainless Steel Constant Force Spring
Spiral,Pipe suspension,Stainless Steel Constant Force Spring
Spiral,Pipe suspension,Stainless Steel Constant Force Spring
A coiled spring delivering near-constant tension, used in tape measures and counterbalances.
<±5% variation vs ±15-20% in conventional springs.
Delivers up to 30m linear travel per spring.
12mm min coiled diameter saves 90% space.
Special lubrication keeps noise <30dB.
Stainless steel + self-lubricating design.
Precision cutting to ±0.02mm width tolerance.
Laser deburring for Ra<0.4μm smoothness.
Special rollers impart initial curvature.
350℃ vacuum annealing relieves stress.
Nickel/Teflon coatings reduce friction.
100% force curve and fatigue life verification.