Compression springs

Compression springs The most usual design for compression springs involves a constant pitch and spring diam­eter. However, springs of this kind can also be designed with a variable pitch and spring diam­eter – conical, convex or concave, for example – which results in smaller fitting dimensions, shorter block length and progressively increas­ing power.

The most important parameters in the specifi­cation of compression springs are:

• wire diameter
• spring diameter
• free length
• sprung length
• spring power
• end design
• type of material

Examples of end designs are recessed or open, ground or unground.

We work in most types of spring material, of which the most common are:

• EN 10270-1- SM (SS 1774-04) Spring steel
• EN 10270-3-1.4310 (SS 2331-06) Stainless steel

We also handle any surface treatment required.
Our modern machines allow us to manufac­ture compression springs with wire diameters of 0.15–15 mm. We supply batch sizes from a single spring to limitless quantity.

Typical examples of products that use compression springs are:
Lawn-mowers, seals, pumps and valves.

When ordering compression springs:

State all measurements in mm and forces in N.
Unless stated otherwise, the material used will be spring steel.
Please include requests for special material, surface treatment and any special conditions. If required, we can provide assistance with calculations and dimensioning.

D_t = Wire diameter

D_i = Internal diameter – if the spring is controlled externally, please state the external diameter Dy

n_t = Total number of coils

C = Spring constant in N/mm

F₁ = Force in N at L1

F₂ =Force in N at L2

L₀ = Free length – if two load values are stated, the free length is only indicative.

L₁ = Loaded length in mm at F1

L₂ = Loaded length in mm at F2

State max. block length if required.
Always specify the end design.