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.) |
hm Hole for fitting (in) |
Material | SKU | Stock | Tech Drawing | Read More | 3D CAD | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.0276 | 2.2638 | 4.3838 | 0.0150 | 1.2500 | 37.2441 | 25,000.0000 | 0.1969 | Stainless steel 301 | CF048-0438 |
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| 2.0669 | 2.2638 | 4.1140 | 0.0157 | 1.0000 | 35.5906 | 25,000.0000 | 0.1969 | Stainless steel 301 | CF046-0411 |
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| 2.3425 | 2.5000 | 1.1195 | 0.0118 | 0.8098 | 24.0157 | N/A | 0.1850 | Stainless steel 301 | CF042-0112 |
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| 2.3622 | 2.8740 | 40.9152 | 0.0311 | 2.0000 | 45.7087 | 4,000.0000 | 0.2638 | Stainless steel 301 | CF060-4089 |
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| 2.5197 | 2.7953 | 5.8450 | 0.0197 | 1.2500 | 41.6535 | 25,000.0000 | 0.1969 | Stainless steel 301 | CF055-0584 |
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| 2.7165 | 2.9134 | 1.6209 | 0.0142 | 1.0000 | 27.0079 | N/A | 0.1850 | Stainless steel 301 | CF048-0162 |
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| 3.2283 | 3.5433 | 8.4303 | 0.0252 | 1.4961 | 42.5591 | 25,000.0000 | 0.2638 | Stainless steel 301 | CF060-0843 |
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| 3.3661 | 3.6614 | 11.7575 | 0.0252 | 2.0000 | 42.6378 | 25,000.0000 | 0.2638 | Stainless steel 301 | CF060-1175 |
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| 4.2913 | 4.6063 | 14.4552 | 0.0311 | 2.0000 | 47.6378 | 25,000.0000 | 0.2638 | Stainless steel 301 | CF070-1445 |
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- CF048-0438In stock: 66
Di - Internal diameter (in) 2.0276De - External diameter (in) 2.2638Fn - Maximum load at Ln (lbs) 4.3838t - Material thickness (in) 0.0150W - Band width (in) 1.2500S1 - Extraction (in) 37.2441Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.1969Material Stainless steel 301
- CF046-0411In stock: 36
Di - Internal diameter (in) 2.0669De - External diameter (in) 2.2638Fn - Maximum load at Ln (lbs) 4.1140t - Material thickness (in) 0.0157W - Band width (in) 1.0000S1 - Extraction (in) 35.5906Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.1969Material Stainless steel 301
- CF042-0112In stock: 45
Di - Internal diameter (in) 2.3425De - External diameter (in) 2.5000Fn - Maximum load at Ln (lbs) 1.1195t - Material thickness (in) 0.0118W - Band width (in) 0.8098S1 - Extraction (in) 24.0157Service life cyclus - (Pcs.) N/Ahm - Hole for fitting (in) 0.1850Material Stainless steel 301
- CF060-4089In stock: 33
Di - Internal diameter (in) 2.3622De - External diameter (in) 2.8740Fn - Maximum load at Ln (lbs) 40.9152t - Material thickness (in) 0.0311W - Band width (in) 2.0000S1 - Extraction (in) 45.7087Service life cyclus - (Pcs.) 4,000.0000hm - Hole for fitting (in) 0.2638Material Stainless steel 301
- CF055-0584In stock: 15
Di - Internal diameter (in) 2.5197De - External diameter (in) 2.7953Fn - Maximum load at Ln (lbs) 5.8450t - Material thickness (in) 0.0197W - Band width (in) 1.2500S1 - Extraction (in) 41.6535Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.1969Material Stainless steel 301
- CF048-0162In stock: 25
Di - Internal diameter (in) 2.7165De - External diameter (in) 2.9134Fn - Maximum load at Ln (lbs) 1.6209t - Material thickness (in) 0.0142W - Band width (in) 1.0000S1 - Extraction (in) 27.0079Service life cyclus - (Pcs.) N/Ahm - Hole for fitting (in) 0.1850Material Stainless steel 301
- CF060-0843In stock: 37
Di - Internal diameter (in) 3.2283De - External diameter (in) 3.5433Fn - Maximum load at Ln (lbs) 8.4303t - Material thickness (in) 0.0252W - Band width (in) 1.4961S1 - Extraction (in) 42.5591Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.2638Material Stainless steel 301
- CF060-1175In stock: 13
Di - Internal diameter (in) 3.3661De - External diameter (in) 3.6614Fn - Maximum load at Ln (lbs) 11.7575t - Material thickness (in) 0.0252W - Band width (in) 2.0000S1 - Extraction (in) 42.6378Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.2638Material Stainless steel 301
- CF070-1445In stock: 18
Di - Internal diameter (in) 4.2913De - External diameter (in) 4.6063Fn - Maximum load at Ln (lbs) 14.4552t - Material thickness (in) 0.0311W - Band width (in) 2.0000S1 - Extraction (in) 47.6378Service life cyclus - (Pcs.) 25,000.0000hm - Hole for fitting (in) 0.2638Material 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.