**COMPRESSION SPRINGS**

Round wire springs with a wire diameter of 0.30 mm to 32.00 mm with cylindrical, conical or biconical helix, as per customer
specifications, but also with variable geometries (with variable pitch, etc.).

The production is carried out by mechanical and numeric control wrapping machines able to guarantee excellent qualitative repeatability of the products.

**Applications**:

Assets for cars and motorcycles, mono shock absorbers, spare parts, moorings, valves, toys, forks, modeling, earthmoving, naval, vibrators, food, dosing pumps, door phone,
biomedical, oenological, etc.

**Standard Materials**:

carbon steels, alloy, stainless steel

**Diameters of wire ø:** 0.10 mm to 32.00 mm

(for larger diameters we use external qualified suppliers)

**Surface treatments:**

Shot blasting, Sandblasting, Oiling, Galvanics in general and Painting

**PARAMETERS OF COMPRESSION
SPRINGS**

- d (wire diameter): this parameter indicates the thickness of the wire used to produce the spring.

- S (Shaft): this parameter corresponds to the maximum diameter of the shaft that can be introduced into the spring. The tolerance for this parameter is +/- 2% (indicative).

- Di (internal diameter): the internal diameter of a spring can be calculated by subtracting twice the diameter of the wire from the outside diameter of the spring. The tolerance for this parameter is +/- 2% (indicative).

- of (outer diameter): the outside diameter of a spring can be calculated by adding twice the diameter of the wire to the inside diameter of the spring. The tolerance for this parameter is +/- 2% (indicative).

- H (Reaming): this is the minimum diameter of operation of the spring. The tolerance for this parameter is +/- 2% (indicative).

- P (Step): average distance between two successive active turns of a spring.

- Lc (block length): maximum spring length after complete blocking. This parameter is placed on the right in the image. The tolerance for this parameter is +/- 15% (indicative).

- Ln (permissible length): maximum permissible length of a spring after twisting. If the deflection is higher, plastic risks becoming deformed (irreversible modification of a shape in response to an applied force). In most cases, there is no risk of spring deformation. Hence, Ln = Lc + Sa, where Sa is the sum of the minimum distances allowed between the active turns

- L0 (free length): the free length is measured in the uncompressed state of the spring after a first lock (if necessary). The tolerance for this parameter is +/- 2% (indicative).

- Number of turns: Total number of turns of a spring (the image above has six). To calculate the number of active turns, just subtract the two turns of the ends.

- R (Rigidity): this parameter determines the resistance of the spring after its compression. It is measured as follows: 1 DaN / mm = 10 N / mm. The tolerance for this parameter is +/- 15% (indicative).

- L1 & F1 (length with force F): force F1 with length L1 can be calculated starting from the following equation: F1 = (L0-L1) * R, which allows to obtain the equation of length L1 L1: L1 = L0 - F1 / R.

- Grinding: indicates if the ends of the spring are ground.

- Code: all the springs are identified by a unique code: type. (De * 10). (d * 100). (L0 * 10). material. for compression springs, the type corresponds to the letter C. The materials are identified by the following letters: A, I, N and S. Example: the code C.063.090.0100.A corresponds to a spring with an external diameter of 6, 3 mm, in steel wire with a diameter of 0, 9 mm and a free length of 10 mm.

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