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Constant force spring - no house
This type of constant force spring is made from strips of stainless steel (type 301), 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 (mm) |
De External diameter (mm) |
Fn Maximum load at Ln (N) |
t Material thickness (mm) |
W Band width (mm) |
S1 Extension (mm) |
Service life cyclus (Pcs.) |
hm Hole for fitting (mm) |
Material | SKU | Stock | Tech Drawing | Read More | 3D CAD | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.50 | 7.60 | 1.70 | 0.08 | 4.75 | 269.00 | 4,000.00 | 2.40 | Stainless steel 301 | CF012-0038 |
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| 7.50 | 10.50 | 2.90 | 0.10 | 6.35 | 333.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF015-0065 |
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| 7.75 | 10.50 | 2.20 | 0.10 | 4.75 | 333.00 | 4,000.00 | 2.40 | Stainless steel 301 | CF015-0049 |
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| 8.25 | 10.75 | 3.70 | 0.10 | 7.90 | 333.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF015-0083 |
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| 9.00 | 11.50 | 2.20 | 0.10 | 6.35 | 305.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF015-0050 |
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| 9.50 | 12.75 | 4.60 | 0.13 | 7.90 | 372.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF017-0103 |
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| 10.67 | 14.00 | 3.34 | 0.13 | 7.87 | 381.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF018-0075 |
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| 11.00 | 15.50 | 6.60 | 0.15 | 9.50 | 536.00 | 4,000.00 | 5.00 | Stainless steel 301 | CF024-0148 |
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| 11.00 | 15.50 | 8.80 | 0.15 | 12.70 | 557.00 | 4,000.00 | 5.00 | Stainless steel 301 | CF025-0198 |
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| 13.00 | 16.50 | 4.98 | 0.15 | 9.40 | 457.00 | 4,000.00 | 3.30 | Stainless steel 301 | CF022-0112 |
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- CF012-0038In stock: 158
Di - Internal diameter (mm) 5.50De - External diameter (mm) 7.60Fn - Maximum load at Ln (N) 1.70t - Material thickness (mm) 0.08W - Band width (mm) 4.75S1 - Extension (mm) 269.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 2.40Material Stainless steel 301
- CF015-0065In stock: 164
Di - Internal diameter (mm) 7.50De - External diameter (mm) 10.50Fn - Maximum load at Ln (N) 2.90t - Material thickness (mm) 0.10W - Band width (mm) 6.35S1 - Extension (mm) 333.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material Stainless steel 301
- CF015-0049In stock: 152
Di - Internal diameter (mm) 7.75De - External diameter (mm) 10.50Fn - Maximum load at Ln (N) 2.20t - Material thickness (mm) 0.10W - Band width (mm) 4.75S1 - Extension (mm) 333.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 2.40Material Stainless steel 301
- CF015-0083In stock: 189
Di - Internal diameter (mm) 8.25De - External diameter (mm) 10.75Fn - Maximum load at Ln (N) 3.70t - Material thickness (mm) 0.10W - Band width (mm) 7.90S1 - Extension (mm) 333.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material Stainless steel 301
- CF015-0050In stock: 212
Di - Internal diameter (mm) 9.00De - External diameter (mm) 11.50Fn - Maximum load at Ln (N) 2.20t - Material thickness (mm) 0.10W - Band width (mm) 6.35S1 - Extension (mm) 305.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material Stainless steel 301
- CF017-0103In stock: 127
Di - Internal diameter (mm) 9.50De - External diameter (mm) 12.75Fn - Maximum load at Ln (N) 4.60t - Material thickness (mm) 0.13W - Band width (mm) 7.90S1 - Extension (mm) 372.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material Stainless steel 301
- CF018-0075In stock: 215
Di - Internal diameter (mm) 10.67De - External diameter (mm) 14.00Fn - Maximum load at Ln (N) 3.34t - Material thickness (mm) 0.13W - Band width (mm) 7.87S1 - Extension (mm) 381.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material Stainless steel 301
- CF024-0148In stock: 135
Di - Internal diameter (mm) 11.00De - External diameter (mm) 15.50Fn - Maximum load at Ln (N) 6.60t - Material thickness (mm) 0.15W - Band width (mm) 9.50S1 - Extension (mm) 536.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 5.00Material Stainless steel 301
- CF025-0198In stock: 52
Di - Internal diameter (mm) 11.00De - External diameter (mm) 15.50Fn - Maximum load at Ln (N) 8.80t - Material thickness (mm) 0.15W - Band width (mm) 12.70S1 - Extension (mm) 557.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 5.00Material Stainless steel 301
- CF022-0112In stock: 218
Di - Internal diameter (mm) 13.00De - External diameter (mm) 16.50Fn - Maximum load at Ln (N) 4.98t - Material thickness (mm) 0.15W - Band width (mm) 9.40S1 - Extension (mm) 457.00Service life cyclus - (Pcs.) 4,000.00hm - Hole for fitting (mm) 3.30Material 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.