Extension Springs - Spring Steel / Music Wire
28-70014-description
Music wire
- E00630070250MIn stock: 343Material Music wired - Wire diameter (in) 0.0071De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.2500Ln - Max. loaded length (in) 0.5402Sn - Maximum travel (in) 0.2902Fn - Maximum load at Ln (lbs) 0.3192F0 - Initial force (lbs) 0.0292R - Spring constant (lb/in) 1.0278Range B
- E00630070310MIn stock: 510Material Music wired - Wire diameter (in) 0.0071De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.3098Ln - Max. loaded length (in) 0.7299Sn - Maximum travel (in) 0.4201Fn - Maximum load at Ln (lbs) 0.3192F0 - Initial force (lbs) 0.0292R - Spring constant (lb/in) 0.6852Range B
- E00630070380MIn stock: 225Material Music wired - Wire diameter (in) 0.0071De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.3799Ln - Max. loaded length (in) 0.9299Sn - Maximum travel (in) 0.5500Fn - Maximum load at Ln (lbs) 0.3192F0 - Initial force (lbs) 0.0292R - Spring constant (lb/in) 0.5139Range B
- E00630070440MIn stock: 57Material Music wired - Wire diameter (in) 0.0071De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.4402Ln - Max. loaded length (in) 1.1201Sn - Maximum travel (in) 0.6799Fn - Maximum load at Ln (lbs) 0.3192F0 - Initial force (lbs) 0.0292R - Spring constant (lb/in) 0.3997Range B
- E00630070500MIn stock: 3,317Material Music wired - Wire diameter (in) 0.0071De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.5000Ln - Max. loaded length (in) 1.3098Sn - Maximum travel (in) 0.8098Fn - Maximum load at Ln (lbs) 0.3192F0 - Initial force (lbs) 0.0292R - Spring constant (lb/in) 0.3997Range B
- E00630080250MIn stock: 4Material Music wired - Wire diameter (in) 0.0079De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.2500Ln - Max. loaded length (in) 0.4598Sn - Maximum travel (in) 0.2098Fn - Maximum load at Ln (lbs) 0.4496F0 - Initial force (lbs) 0.0405R - Spring constant (lb/in) 1.9986Range B
- E00630080310MIn stock: 154Material Music wired - Wire diameter (in) 0.0079De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.3098Ln - Max. loaded length (in) 0.6000Sn - Maximum travel (in) 0.2902Fn - Maximum load at Ln (lbs) 0.4496F0 - Initial force (lbs) 0.0405R - Spring constant (lb/in) 1.4275Range B
- E00630080380MIn stock: 248Material Music wired - Wire diameter (in) 0.0079De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.3799Ln - Max. loaded length (in) 0.7500Sn - Maximum travel (in) 0.3701Fn - Maximum load at Ln (lbs) 0.4496F0 - Initial force (lbs) 0.0405R - Spring constant (lb/in) 1.0849Range B
- E00630080440MIn stock: 214Material Music wired - Wire diameter (in) 0.0079De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.4402Ln - Max. loaded length (in) 0.9098Sn - Maximum travel (in) 0.4697Fn - Maximum load at Ln (lbs) 0.4496F0 - Initial force (lbs) 0.0405R - Spring constant (lb/in) 0.9136Range B
- E00630080500MIn stock: 34Material Music wired - Wire diameter (in) 0.0079De - External diameter (in) 0.0630L0 - Unloaded length (in) 0.5000Ln - Max. loaded length (in) 1.0500Sn - Maximum travel (in) 0.5500Fn - Maximum load at Ln (lbs) 0.4496F0 - Initial force (lbs) 0.0405R - Spring constant (lb/in) 0.6852Range B
DIN 17223 C-Wire WERKSTOFF NO. 1.200
Working temperature between -30 ºC and +120 ºC.
Produced in spring steel for use in dry environment. The spring steel is not rust-resistant.
If needed for use in humid/wet environment, choose from our collection of models in stainless steel here.
Range A: (The A Range consists of springs with 5 digits, ie: "32200")
All dimensions and forces in accordance with DIN 2097 (Grade 2). DIN 2097 defines the force as the determining parameter. The number of coils may therefore vary and is consequently not stated for these ranges.
Range B: (The B Range consists of springs with 11 digits and 2 letters, ie: "E03600552000M")
For more information, contact Sodemann-Springs.US
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
Range A:Closed German loops in accordance with DIN 2097, random angle.
Tolerance at loop height (LH) is from 0.8 to 1.1 * Dm. The loop position (X) is variable and the loops can therefore be turned in relation to one another. The diameter of loops may well exceed the external diameter of the body. The tolerance for deviations is determined based on the definition below.
Example: Stock number 32600 has a wire thickness of 2.5 mm. The external diameter is 18 mm, which produces a mean diameter of 15.5 mm. From the table above, we can determine how wide the loop must be. First we must work out the coil ratio using the formula Dm/d. The loop width can then be determined using the table above.
Coil ratio: 15.5 mm/2.5 mm = 6.2 mm
Loop width: 18 mm + (1.5 * 2.5 mm) = 21.75 mm
Range B: Loops in this range are closed loops without a specific loop shape and with a random angle. Every effort is made to keep the same external diameter as the spring body. However, the external diameter of the loop may vary.
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)