Constant force spring - no house
This type of constant force spring is made from strips of stainless steel (type 302), and the spring will maintain a constant force over its whole extension. The force differs, depending on whether it is measured on the strip’s outward movement or inward movement. It is recommended that there should be a minimum of 1 1/2 turns of the spring remaining on the mandrel at full extension.
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| View prices - Add to Cart | Di Internal diameter (in) |
De External diameter (in) |
Fn Maximum load at Ln (lbs) |
t Material thickness (in) |
W Band width (in) |
S1 Extraction (in) |
Service life cyclus (pcs.) (new) | hm Hole for fitting (in) |
Material | SKU | Stock | Tech Drawing | Read More | 3D CAD | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.2165 | 0.2992 | 0.3822 | 0.0031 | 0.1870 | 10.5906 | 4,000.0000 | 0.0945 | Stainless steel 301 | CF012-0038 |
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| 0.2953 | 0.4134 | 0.6519 | 0.0039 | 0.2500 | 13.1102 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF015-0065 |
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| 0.3051 | 0.4134 | 0.4946 | 0.0039 | 0.1870 | 13.1102 | 4,000.0000 | 0.0945 | Stainless steel 301 | CF015-0049 |
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| 0.3248 | 0.4232 | 0.8318 | 0.0039 | 0.3110 | 13.1102 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF015-0083 |
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| 0.3543 | 0.4528 | 0.4946 | 0.0039 | 0.2500 | 12.0079 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF015-0050 |
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| 0.3740 | 0.5020 | 1.0341 | 0.0051 | 0.3110 | 14.6457 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF017-0103 |
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| 0.4201 | 0.5512 | 0.7509 | 0.0051 | 0.3098 | 15.0000 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF018-0075 |
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| 0.4331 | 0.6102 | 1.4837 | 0.0059 | 0.3740 | 21.1024 | 4,000.0000 | 0.1969 | Stainless steel 301 | CF024-0148 |
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| 0.4331 | 0.6102 | 1.9783 | 0.0059 | 0.5000 | 21.9291 | 4,000.0000 | 0.1969 | Stainless steel 301 | CF025-0198 |
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| 0.5118 | 0.6496 | 1.1195 | 0.0059 | 0.3701 | 17.9921 | 4,000.0000 | 0.1299 | Stainless steel 301 | CF022-0112 |
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- CF012-0038In stock: 547
Di - Internal diameter (in) 0.2165De - External diameter (in) 0.2992Fn - Maximum load at Ln (lbs) 0.3822t - Material thickness (in) 0.0031W - Band width (in) 0.1870S1 - Extraction (in) 10.5906Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.0945Material Stainless steel 301
- CF015-0065In stock: 150
Di - Internal diameter (in) 0.2953De - External diameter (in) 0.4134Fn - Maximum load at Ln (lbs) 0.6519t - Material thickness (in) 0.0039W - Band width (in) 0.2500S1 - Extraction (in) 13.1102Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
- CF015-0049In stock: 147
Di - Internal diameter (in) 0.3051De - External diameter (in) 0.4134Fn - Maximum load at Ln (lbs) 0.4946t - Material thickness (in) 0.0039W - Band width (in) 0.1870S1 - Extraction (in) 13.1102Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.0945Material Stainless steel 301
- CF015-0083In stock: 185
Di - Internal diameter (in) 0.3248De - External diameter (in) 0.4232Fn - Maximum load at Ln (lbs) 0.8318t - Material thickness (in) 0.0039W - Band width (in) 0.3110S1 - Extraction (in) 13.1102Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
- CF015-0050In stock: 212
Di - Internal diameter (in) 0.3543De - External diameter (in) 0.4528Fn - Maximum load at Ln (lbs) 0.4946t - Material thickness (in) 0.0039W - Band width (in) 0.2500S1 - Extraction (in) 12.0079Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
- CF017-0103In stock: 298
Di - Internal diameter (in) 0.3740De - External diameter (in) 0.5020Fn - Maximum load at Ln (lbs) 1.0341t - Material thickness (in) 0.0051W - Band width (in) 0.3110S1 - Extraction (in) 14.6457Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
- CF018-0075In stock: 215
Di - Internal diameter (in) 0.4201De - External diameter (in) 0.5512Fn - Maximum load at Ln (lbs) 0.7509t - Material thickness (in) 0.0051W - Band width (in) 0.3098S1 - Extraction (in) 15.0000Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
- CF024-0148In stock: 521
Di - Internal diameter (in) 0.4331De - External diameter (in) 0.6102Fn - Maximum load at Ln (lbs) 1.4837t - Material thickness (in) 0.0059W - Band width (in) 0.3740S1 - Extraction (in) 21.1024Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1969Material Stainless steel 301
- CF025-0198In stock: 423
Di - Internal diameter (in) 0.4331De - External diameter (in) 0.6102Fn - Maximum load at Ln (lbs) 1.9783t - Material thickness (in) 0.0059W - Band width (in) 0.5000S1 - Extraction (in) 21.9291Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1969Material Stainless steel 301
- CF022-0112In stock: 209
Di - Internal diameter (in) 0.5118De - External diameter (in) 0.6496Fn - Maximum load at Ln (lbs) 1.1195t - Material thickness (in) 0.0059W - Band width (in) 0.3701S1 - Extraction (in) 17.9921Service life cyclus (pcs.) (new) 4,000.0000hm - Hole for fitting (in) 0.1299Material Stainless steel 301
Material
Stainless band Type 301
Working temperature -200 ºC - +200 ºC
Tolerances
Di internal diameter: +/- 15%
De external diameter: +/- 15%
Fn max force: +/- 20% measured during outward movement.
Description
This type of constant force springs are made from stainless bands (type 301), and when pulled, the spring will have a constant pull over its whole range. The force differs, depending on whether it is measured on the strip's outward movement or inward movement. It is recommended that at least 1-½ turns of the coil remains on the axle when fully pulled out.