Extension Springs | Produced In Stainless Steel

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 is approx. 12% weaker than Fn for exact model produced in spring steel (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)