ZenaTech offers Constant Force Springs in four Life Cycle ranges. Each spring is a roll of high yield Type 301 Stainless Steel strip exerting a nearly constant restraining force to resist uncoiling. When the strip is extended, the inherent stress resists the loading force at a nearly constant rate.
Guide to Mounting Constant Force Springs
A Constant Force Spring is usually mounted by first tightly wrapping it on a drum, then attaching the free end to the loading force such as in a counterbalance application. This relationship can also be reversed.
The drum diameter should be 10 to 20% larger than its natural diameter.
One and one-half wraps should remain on the drum at maximum extension.
The strip becomes unstable at long extensions and should be guided to
prevent twisting or kinking on recoil.
Idler pulleys must be larger in diameter than the natural diameter and should never be used to cause back-bending against the natural radius of curvature.
2500 Life Cycle
4000 Life Cycle
13000 Life Cycle
25000 Life Cycle
Custom spring, stamping parts, machining parts, plastic injected parts.——