If you want a PDF datasheet or a 3D CAD drawing of the spring in .step, .iges or .sat format, these can be downloaded for free by clicking on the 3D CAD symbol next to the item number in the table.

If you want to know how much force a compression spring produces for a given length/travel, you can use the following formula:

Travel (s) x Spring constant ® (R)

If a spring is compressed 16 mm (s) and has a spring constant of 3 N/mm (R), this produces a force of: 16 mm x 3 N/mm = 48 N

16 mm x 3 N/mm = 48 N (ca. 4,8kg)

If a compression spring with a very high spring constant and carrying capacity is required, coloured die springs may be recommended. Read more

The spring constant tells you how much force a spring produces per millimetre when it is compressed. If a spring has a spring constant of 1.5 N/mm and it is compressed 10 mm, then the force of the spring is 15 N.

Series A, B and C:  The spring constant is given in the table.

Series D:  There are no spring constants for this range of springs. These springs are designed to test and try where the springs can be shortened to achieve the desired length. The spring constant depends on the length, so we are unable to provide a general spring constant.

Series A:   (See which series a spring belongs to in the “Series” column in the table. )
Springs with a wire thickness of up to 0.8 mm are closed but unground.
Springs with a wire thickness of 1.0 mm and above are closed and ground.

Series B and C:  (See which series a spring belongs to in the “Series” column in the table. )
The product page for each individual product shows if it is closed and ground or unground.

Series D:  (See which series a spring belongs to in the “Series” column in the table. )
As the series is produced for testing and cutting, the design of the ends is not defined.

Closed, ground

Closed, unground

Not closed

Usually right. The force and application is not affected by the direction of wind.

Standard compression springs are not defined with a specific direction of wind. Depending on production, the springs may be either right or left wound. If a specific direction of wind is required, it is possible to have them produced as special springs.

The service life of a spring is generally very difficult to define. A large number of parameters come into play, and it is therefore impossible to define a service life.

Parameters with a significant influence on service life include: Installation, installation method, number of movements, vibrations, shocks, torsion, length of travel, non-axial travel, temperature, wear against other surfaces, environment of use, any cleaning agents, lateral impacts, etc.

Always dimension a compression spring so that it delivers the desired travel and force with as little exertion as possible. This will give the spring the longest possible service life.

Applying the maximum load to the spring or exceeding it will shorten its service life and may cause it to become permanently distorted.

Therefore we recommend that you do not use more than 75% of the maximum travel (Sn) of conical springs.

If the compression spring is compressed to Ln (the max. loaded length), it will set itself. It will then not return to its original length.