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FAQ Compression Springs

For stainless steel compression springs, we use the following material:

Stainless steel:

DIN 17224 / X10CrNi 18-8 / AISI 302 / Workpiece number 1.4310 /

EN 10270 3:01

A compression spring is distinguished by its various parameters.

The meanings of the parameters are as follows:

ParameterMeaning
dWire thickness
DmDiameter center to center
DiInner diameter (Dm – d)
DuExternal diameter (Dm+d)
NwNumber of active windings
LoUnstrained length
LnMaximum compressed length
FnForce at strained length in N
SnIndentation at force Fn
CForce increase per mm of indentation
Min. BusBushing Size
Mas. AshAxis size

One type of coil spring is the compression spring with variable windings (variable pitch). These compression springs are not constructed with the standard equal distance between the windings but the windings are made in sets with certain space between them.

An hourglass spring is a type of compression spring (coil spring), this coil spring has a higher upper and lower outer diameter compared to the middle outer diameter. These coil springs have high stability and, like the conical compression springs, they are suitable for smaller spaces.

A barrel spring is a type of coil spring (compression spring), this spring owes its name to its appearance which resembles a barrel. A barrel spring is a type of compression spring that produces linear forces where the upper and lower outer diameters are smaller than the center outer diameter. This allows the spring to save space.

The conical spring is a type of compression spring. Conical compression springs have a pyramid shape. The pyramid shape of coil spring allows forces to be delivered in a limited space (axial space). This is because all the windings are folded together at full indentation.

Spiral springs are versions of compression springs. The most well-known type of compression spring is constructed by constant windings. In constant pitch (space between windings), all windings of the compression spring are equally spaced. The constant pitch coil spring is the standard compression spring.

Our standard compression springs are calculated for a static load (=resting load). That is, the spring is temporarily, constantly loaded. There is talk of quasi-static loading (=seldom alternating loading) if the springs receive additional loading at large intervals. Over the lifetime less than 10^4 load changes.

With dynamic loading , the following applies:
alternating load; the number of alternations is > 10^7; here the life of the push spring is limited.
alternating load; the number of alternations is < 10^7, where the lifetime is theoretically unlimited.

If you wish to load our standard push spring quasi-statically or dynamically, please contact our engineering department to have the service life calculated.

For compression springs, we use the following maximum operating temperatures:

Operating temperature:

Spring steel: max. +80 degrees Celsius

Stainless steel: max. +250 degrees Celsius

At higher temperatures, please advise our engineering department

To stack compression springs, there are three common ways:

  1. Parallel circuits
  2. Series circuits
  3. Mixed circuits

What standard spring steel is standard for compression springs?

For compression springs in spring steel we apply:

Spring steel:

DIN 17223 C / working material number 1.1200

Up to wire thickness 2 mm: EN10270-1:01 DH (bonded)

> wire thick

For calculating compression springs, please refer to DIN 2089-1 (EN 13906-1) and DIN 2095-2.

The standard compression springs up to wire 1.0 mm, are laid out but not ground. From wire 1.0 mm, our standard springs are both laid and ground.

Standard compression springs are produced in both spring steel and stainless steel AISI 302.

Yes, custom compression springs can be requested from Tevema. Compression springs can be cold produced up to 20 mm wire thickness. The compression springs can obtain a maximum outer diameter of 200 mm and a maximum free length of 4,000 mm.

All custom compression springs are produced on/with:

  • Wire 20 mm cold twisted
  • CNC machines
  • High precision
  • 100% inspection of untensioned spring length and diameter if necessary.
  • In all common work materials

Presetting is standard up to and including:

  • Wire range: 15 mm
  • Free length: 500 mm
  • Outer diameter of spring: 169 mm

The following steps apply when designing or selecting the right compression spring:

  1. Pressure spring object
  2. End of the compression spring
  3. The number of windings
  4. Configuring the compression spring properly
  5. The resilience allowed
  6. The spring index
  7. Pressure spring calculations
  8. Five ways to arrive at a choice of compression spring

There are five basic methods for arriving at the correct compression spring. All five are explained below; only one method is needed.

  1. Based on physical dimensions
  2. Based on the spring constant
  3. Based on two taxes
  4. Based on one load and spring constant
  5. Based on one load and free length

There are five types of compression springs (coil springs). The difference is explained here. The five types of compression springs are:

1. Compression springs with constant winding
2. Compression springs with variable winding
3. Barrel Springs
4. Hourglass Springs
5. Conical compression springs

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