Stock Drive Products & Sterling Instrument - SDP/SI 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.
Constant Force Springs: Learn more

Product Name Notes
Constant Force Spring: 0.23 lb Spring Force, 20000 cycles Fatique Life, 16" Band length
Constant Force Spring: 0.32 lb Spring Force, 13000 cycles Fatique Life, 15" Band length
Constant Force Spring: 0.36 lb Spring Force, 20000 cycles Fatique Life, 17" Band length
Constant Force Spring: 0.37 lb Spring Force, 2500 cycles Fatique Life, 10" Band length
Constant Force Spring: 0.4 lb Spring Force, 13000 cycles Fatique Life, 15" Band length
Constant Force Spring: 0.43 lb Spring Force, 20000 cycles Fatique Life, 30" Band length
Constant Force Spring: 0.49 lb Spring Force, 13000 cycles Fatique Life, 16" Band length
Constant Force Spring: 0.49 lb Spring Force, 2500 cycles Fatique Life, 14" Band length
Constant Force Spring: 0.52 lb Spring Force, 20000 cycles Fatique Life, 24" Band length
Constant Force Spring: 0.66 lb Spring Force, 2500 cycles Fatique Life, 14" Band length
Constant Force Spring: 0.7 lb Spring Force, 20000 cycles Fatique Life, 24" Band length
Constant Force Spring: 0.71 lb Spring Force, 13000 cycles Fatique Life, 23" Band length
Constant Force Spring: 0.83 lb Spring Force, 2500 cycles Fatique Life, 14" Band length
Constant Force Spring: 0.93 lb Spring Force, 20000 cycles Fatique Life, 31" Band length
Constant Force Spring: 0.95 lb Spring Force, 13000 cycles Fatique Life, 23" Band length
Constant Force Spring: 1.03 lb Spring Force, 2500 cycles Fatique Life, 15" Band length
Constant Force Spring: 1.26 lb Spring Force, 13000 cycles Fatique Life, 30" Band length
Constant Force Spring: 1.46 lb Spring Force, 20000 cycles Fatique Life, 33" Band length
Constant Force Spring: 1.48 lb Spring Force, 2500 cycles Fatique Life, 21" Band length
Constant Force Spring: 1.58 lb Spring Force, 13000 cycles Fatique Life, 30" Band length
Constant Force Spring: 1.97 lb Spring Force, 2500 cycles Fatique Life, 21" Band length
Constant Force Spring: 1.98 lb Spring Force, 13000 cycles Fatique Life, 32" Band length
Constant Force Spring: 10.6 lb Spring Force, 2500 cycles Fatique Life, 38" Band length
Constant Force Spring: 11.7 lb Spring Force, 20000 cycles Fatique Life, 59" Band length
Constant Force Spring: 11.9 lb Spring Force, 13000 cycles Fatique Life, 57" Band length
Constant Force Spring: 14.40 lb Spring Force, 20000 cycles Fatique Life 69" Band length
Constant Force Spring: 15.8 lb Spring Force, 13000 cycles Fatique Life, 57" Band length
Constant Force Spring: 16.5 lb Spring Force, 2500 cycles Fatique Life, 47" Band length
Constant Force Spring: 19.6 lb Spring Force, 13000 cycles Fatique Life, 68" Band length
Constant Force Spring: 19.8 lb Spring Force, 2500 cycles Fatique Life, 47" Band length
Constant Force Spring: 2.09 lb Spring Force, 20000 cycles Fatique Life, 42" Band length
Constant Force Spring: 2.37 lb Spring Force, 13000 cycles Fatique Life, 32" Band length
Constant Force Spring: 2.63 lb Spring Force, 2500 cycles Fatique Life, 28" Band length
Constant Force Spring: 2.8 lb Spring Force, 20000 cycles Fatique Life, 42" Band length
Constant Force Spring: 2.84 lb Spring Force, 13000 cycles Fatique Life, 40" Band length
Constant Force Spring: 24.8 lb Spring Force, 2500 cycles Fatique Life, 48" Band length
Constant Force Spring: 3.29 lb Spring Force, 2500 cycles Fatique Life, 28" Band length
Constant Force Spring: 3.5 lb Spring Force, 20000 cycles Fatique Life, 46" Band length
Constant Force Spring: 3.79 lb Spring Force, 13000 cycles Fatique Life, 40" Band length
Constant Force Spring: 33 lb Spring Force, 2500 cycles Fatique Life, 48 48" Band length
Constant Force Spring: 4.12 lb Spring Force, 2500 cycles Fatique Life, 29" Band length
Constant Force Spring: 4.37 lb Spring Force, 20000 cycles Fatique Life, 46" Band length
Constant Force Spring: 4.74 lb Spring Force, 13000 cycles Fatique Life, 42" Band length
Constant Force Spring: 4.95 lb Spring Force, 2500 cycles Fatique Life, 29" Band length
Constant Force Spring: 40.9 lb Spring Force, 2500 cycles Fatique Life, 58" Band length
Constant Force Spring: 5.69 lb Spring Force, 13000 cycles Fatique Life, 47" Band length
Constant Force Spring: 5.83 lb Spring Force, 20000 cycles Fatique Life, 54" Band length
Constant Force Spring: 5.94 lb Spring Force, 2500 cycles Fatique Life, 36" Band length
Constant Force Spring: 6.99 lb Spring Force, 20000 cycles Fatique Life, 54" Band length
Constant Force Spring: 7.92 lb Spring Force, 2500 cycles Fatique Life, 36" Band length
Constant Force Spring: 8.74 lb Spring Force, 20000 cycles Fatique Life, 59" Band length
Constant Force Spring: 9.48 lb Spring Force, 13000 cycles Fatique Life, 52" Band length