Stock sizes in stainless steel
Constant-force springs are a special variety of extension spring. They consist of a spiral of strip material with built-in curvature so that each turn of the strip wraps tightly on its inner neighbor. When the strip is extended (deflected) the inherent stress resists the loading force, just as in a common extension spring, but at a nearly constant (zero) rate. The accompanying load/deflection curves illustrate this.
The constant-force spring is will suited to long extensions with no load build-up. In use, the spring is usually mounted with the ID tightly wrapped on a drum and the free end attached to the loading force, such as in a counterbalance application. This relationship can be reversed, however, with the free end mounted stationary and the spring itself providing the working force, as with carbon brushes in electrical apparatus.
Considerable flexibility is possible with constant-force springs because the load capacity can be multiplied by using two or more strips in tandem, or back-to-back, as illustrated.
With springs being such an integral part of power transmission applications, Reid Supply has about every kind of spring: compression springs, die springs, solid springs, drawbar springs, extension springs, torsion springs, etc.
. CFS-45 Manufacturer Part Number: CF043-0700
ASRaymond | Reid Supply | |
---|---|---|
Product Category | Constant Force Springs | Constant Force Springs |
Product Number | CF043-0700 | CFS-45 |
Product Name | Constant Force Spring, Stainless Steel | Constant-Force Spring |
Material | 301SS | 301SS; 310 Stainless Steel |
Life Cycle | 4000 cycles | |
Load Force | 7 lbs (3.17 kg) | |
Inside Diameter | 1.19 inch (30.23 mm) | |
Outside Diameter | 1.50 inch (38.1 mm) |