Extension Springs - Stainless Steel
The C range is a small range of springs in electrogalvanised and stainless steel wire. The springs you see here, are made in stainless steel. Although it is a small range, it is a good complement to Range A & B.
The stainless steel springs offers good protection against corrosion but not against seawater. The dimensions are the same for electrogalvanised and stainless steel, the only difference being the force. The stainless steel springs are approximately 10% weaker than the galvanised ones.
| View prices - Add to Cart | Material | d Wire diameter (in) |
De External diameter (in) |
L0 Unloaded length (in) |
Ln Max. loaded length (in) |
Sn Maximum travel (in) |
Fn Maximum load at Ln (lbs) |
F0 Initial force (lbs) |
R Spring constant (lb/in) |
Range | SKU | Stock | Tech Drawing | Read More | 3D CAD | |
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| Stainless steel 302 | 0.0236 | 0.3150 | 2.3228 | 11.0343 | 8.7114 | 2.0817 | 0.2248 | 0.2284 | C | 503RF |
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| Stainless steel 302 | 0.0315 | 0.3543 | 1.5354 | 5.0437 | 3.5083 | 4.1927 | 0.6744 | 1.0278 | C | 502RF |
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| Stainless steel 302 | 0.0335 | 0.2756 | 1.3583 | 2.5972 | 1.2390 | 6.3104 | 1.3489 | 3.9971 | C | 501RF |
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| Stainless steel 302 | 0.0335 | 0.3150 | 2.3622 | 5.9728 | 3.6106 | 5.5663 | 1.1240 | 1.2562 | C | 504RF |
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| Stainless steel 302 | 0.0394 | 0.3543 | 2.3819 | 5.5374 | 3.1551 | 7.8571 | 1.5737 | 1.9986 | C | 505RF |
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| Stainless steel 302 | 0.0394 | 0.3937 | 4.4094 | 12.7323 | 8.3228 | 7.1107 | 1.3489 | 0.6852 | C | 507RF |
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| Stainless steel 302 | 0.0492 | 0.5118 | 2.5000 | 6.9445 | 4.4445 | 10.3682 | 1.7985 | 1.9415 | C | 508RF |
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| Stainless steel 302 | 0.0551 | 0.4331 | 3.2677 | 6.7622 | 3.4933 | 16.6583 | 1.3489 | 4.3968 | C | 506RF |
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| Stainless steel 302 | 0.0591 | 0.6299 | 5.1575 | 15.4992 | 10.3417 | 14.1877 | 2.4729 | 1.1420 | C | 510RF |
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| Stainless steel 302 | 0.0689 | 0.5512 | 4.9213 | 9.6677 | 4.7465 | 24.7560 | 5.3954 | 4.0542 | C | 509RF |
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- 503RFIn stock: 1,088
Material Stainless steel 302d - Wire diameter (in) 0.0236De - External diameter (in) 0.3150L0 - Unloaded length (in) 2.3228Ln - Max. loaded length (in) 11.0343Sn - Maximum travel (in) 8.7114Fn - Maximum load at Ln (lbs) 2.0817F0 - Initial force (lbs) 0.2248R - Spring constant (lb/in) 0.2284Range C
- 502RFIn stock: 1,191
Material Stainless steel 302d - Wire diameter (in) 0.0315De - External diameter (in) 0.3543L0 - Unloaded length (in) 1.5354Ln - Max. loaded length (in) 5.0437Sn - Maximum travel (in) 3.5083Fn - Maximum load at Ln (lbs) 4.1927F0 - Initial force (lbs) 0.6744R - Spring constant (lb/in) 1.0278Range C
- 501RFIn stock: 823
Material Stainless steel 302d - Wire diameter (in) 0.0335De - External diameter (in) 0.2756L0 - Unloaded length (in) 1.3583Ln - Max. loaded length (in) 2.5972Sn - Maximum travel (in) 1.2390Fn - Maximum load at Ln (lbs) 6.3104F0 - Initial force (lbs) 1.3489R - Spring constant (lb/in) 3.9971Range C
- 504RFIn stock: 737
Material Stainless steel 302d - Wire diameter (in) 0.0335De - External diameter (in) 0.3150L0 - Unloaded length (in) 2.3622Ln - Max. loaded length (in) 5.9728Sn - Maximum travel (in) 3.6106Fn - Maximum load at Ln (lbs) 5.5663F0 - Initial force (lbs) 1.1240R - Spring constant (lb/in) 1.2562Range C
- 505RFIn stock: 1,104
Material Stainless steel 302d - Wire diameter (in) 0.0394De - External diameter (in) 0.3543L0 - Unloaded length (in) 2.3819Ln - Max. loaded length (in) 5.5374Sn - Maximum travel (in) 3.1551Fn - Maximum load at Ln (lbs) 7.8571F0 - Initial force (lbs) 1.5737R - Spring constant (lb/in) 1.9986Range C
- 507RFIn stock: 1,155
Material Stainless steel 302d - Wire diameter (in) 0.0394De - External diameter (in) 0.3937L0 - Unloaded length (in) 4.4094Ln - Max. loaded length (in) 12.7323Sn - Maximum travel (in) 8.3228Fn - Maximum load at Ln (lbs) 7.1107F0 - Initial force (lbs) 1.3489R - Spring constant (lb/in) 0.6852Range C
- 508RFIn stock: 1,276
Material Stainless steel 302d - Wire diameter (in) 0.0492De - External diameter (in) 0.5118L0 - Unloaded length (in) 2.5000Ln - Max. loaded length (in) 6.9445Sn - Maximum travel (in) 4.4445Fn - Maximum load at Ln (lbs) 10.3682F0 - Initial force (lbs) 1.7985R - Spring constant (lb/in) 1.9415Range C
- 506RFIn stock: 2,282
Material Stainless steel 302d - Wire diameter (in) 0.0551De - External diameter (in) 0.4331L0 - Unloaded length (in) 3.2677Ln - Max. loaded length (in) 6.7622Sn - Maximum travel (in) 3.4933Fn - Maximum load at Ln (lbs) 16.6583F0 - Initial force (lbs) 1.3489R - Spring constant (lb/in) 4.3968Range C
- 510RFIn stock: 470
Material Stainless steel 302d - Wire diameter (in) 0.0591De - External diameter (in) 0.6299L0 - Unloaded length (in) 5.1575Ln - Max. loaded length (in) 15.4992Sn - Maximum travel (in) 10.3417Fn - Maximum load at Ln (lbs) 14.1877F0 - Initial force (lbs) 2.4729R - Spring constant (lb/in) 1.1420Range C
- 509RFIn stock: 1,291
Material Stainless steel 302d - Wire diameter (in) 0.0689De - External diameter (in) 0.5512L0 - Unloaded length (in) 4.9213Ln - Max. loaded length (in) 9.6677Sn - Maximum travel (in) 4.7465Fn - Maximum load at Ln (lbs) 24.7560F0 - Initial force (lbs) 5.3954R - Spring constant (lb/in) 4.0542Range C
DIN 17224 AISI 302 WERKSTOFF NO. 1.4310
Working temperature between -200 ºC and +250 ºC.
Produced in stainless steel for use in all environment. The stainless steel is rust-resistant.
Fn for stainless steel spring steel is approx. 0.88 x Fn for music wire.
Calculation of the initial force (F0):
The initial force F0 or the initial tension is for guidance only due to differing production processes.
F0 = Fn - (R * Sn). A rule of thumb is however that F0 is 10-15% of Fn.
For example, for stock number 32600, Fn = 237 N, R = 2,67N/mm og Sn = 75,70mm. F0 = 237N - (2,67N/mm * 75,70mm) = 237N - 202N = 35N
The calculation of spring force for a given length:
Calculation of spring force at a given length is: F0 + (travel * R).
For example, for stock number 32600 where R = 2.67 N/mm, the desired travel is 55 mm and F0 is approx. 35 N. 35N + (55mm * 2,67N/mm) = 35N + 147N = 182N
Normally right-handed
Standard springs are not defined with a specific direction of wind. Depending on production, the springs may be produced either right or left wound. If you require a specific direction of wind a special spring must be produced.
If an extension spring with an exact value for one of the following parameters is required, springs must be custom-made:
- Loop type
- Loop height (LH)
- Loop position (X)
- Loop width (if the spring is to be incorporated into a tube)
- Opening at loop (m)
- Initial force (F0)