Compression springs expand when they are compressed. The enlargement of the outside diameter under load deltaDA in mm is calculated with solid height LbI and free bearing of the spring ends:
- deltaDa= 0.1*m²-0.8md-0.2d²/Dm
- m=Lo-d/if for springs with squared and ground ends
- m=Lo-2.5d/if for springs with unsquared, unground ends
Spring setting refers to a compression spring which after being compressed for the first time does not return to its original favourable length. This means that after setting, the material elasticity is inadequate to carry the load of the spring. The load the spring produces will be at a lower height and possibly less than required.
Our Compression Springs product range comprises Die Springs according to DIN & ISO, Conical Springs and Compression Ceramic Springs.
Compression Spring Characteristics
- round, flat-oval, rectangular
Compression Spring Material
- EN 10270-1 patented drawn unalloyed music wire (spring steel)
- EN 10270-2 oil hardened and tempered music wire (spring steel)
- EN 10270-3 stainless spring steel wire
Other materials like Inconel, Incoloy HT800, copper beryllum and spring bronze are available on request.
- Compression springs made of the material EN 10270-1 spring steel are oiled
- Compression springs mades of the material EN 10270-3 are dry
The standard winding direction of compression springs is right hand winding. This means that if you look through the spring axis, the winding of a spring wound to the right moves away clockwise.
|D||Wire / Bar diameter|
|nt||Total number of coils|
|L0||Length of unloaded spring|
|L1||Spring length at load F1|
|L2||Spring length at load F2|
|Ln||Minimal spring length allowed|
|c (N/mm)||Spring rate|
|e1||Deviation from parallelism of generating line|
|e2||Deviation from parallelism of ground ends|
|tx||Tension at load x|
Download our free calculation program, to calculate the expansion of compression springs.
The actual service life of a compression spring depends, among other things, on the spring deflection between the two compression points and their position relative to the spring length. Thus, the service life will differ for each spring.
Contact us for help with the design and calculation of your application problem.
Compression Spring Applications
- Mechanical engineering
- Electrical engineering
- Medical technology