Constant force springs

Because they provide a uniform force, constant force springs are used in many industries as a retraction element. They can be used as tension/compression springs for long extensions with constant force and as torque generators with controllable spring characteristics.

 

  1. Spring width: 1.8 - 100 mm
  2. Spring thickness: 0.05 - 3.0 mm
  3. Material: Textured carbon and stainless steels
  4. Service life: Up to 50,000 load cycles
  5. Minimum hysteresis
  6. Very uniform force-displacement characteristic

TYPICAL APPLICATIONS OF CONSTANT FORCE SPRINGS

Constant force springs for weight balancing

Window balance system

Assembly consisting of MIGRA 1A constant force springs and plastic parts. Each spring is marked with its force for identification.

These modules are used as weight compensation for opening vertical sliding windows.

Stainless spring steel strip SUPERFLEX

    

 

Counterweight

MIGRA 2B constant force springs are mounted on a coil or bushing, or they run freely in a cavity or recess.

Spring balancer systems are used for weight compensation, e.g. in machines for height compensation or in roller blind systems on skylights.

Textured rolled special steel PRIMAFLEX 

    

 

Constant force springs for push and pull systems

Kinematic module cup holder

MIGRA 1A type constant force springs are ideal for applications with a linear motion, e.g. in kinematic modules.

The spring pushes the cup holder out of the dashboard to within reach of the vehicle occupants.

Textured rolled special steel PRIMAFLEX 

Cable retractor

The MIGRA 2B constant force springs is mounted on a plastic supply roller. The name MIGRA stands for MInimum GRAdient.

Vacuum cleaner cables can be wound up with a power spring or constant force spring. Thanks to its flat characteristic curve, the constant force spring runs smoothly and easily.

Textured rolled special steel PRIMAFLEX 

Constant force springs for retractors

Sun blind

The constant force spring is perforated over its entire length, allowing it to be sewn to the sun blind.

The spring supports the guidance of the sun blind under a panoramic glass roof of a car. It tightens the sun blind and keeps it in shape.

Stainless spring steel strip SUPERFLEX

 

 

Sun blind

The constant force spring is glued to the sun blind over its entire length.

The spring supports the guidance of the sun blind under a panoramic glass roof of a car. It tightens the sun blind and keeps it in shape.

Stainless spring steel strip SUPERFLEX

Constant force springs for feed systems

Product feed (point of sale)

The constant force spring covers a progressive force curve.

When products are removed, the spring pushes further products evenly towards the buyer.

Stainless spring steel strip SUPERFLEX

Carbon brush holder

MIGRA 2A constant force springs consist of 2 connected springs, which allows the force to be divided; ideal for small installation conditions.

The spring presses the carbon against the commutator (e.g. electric motor) with a constant force. Due to the uniform contact pressure, the electric motor has a longer service life and smoother operation.

Stainless spring steel strip SUPERFLEX

Constant force springs as protective covering

Dirt cover

Telescopic springs are given its typical shape in a special rolling process. Thanks to the spring force, they follow the machine movements.

Telescopic springs protect moving machine parts such as spindles from dirt, extending their service life.

Textured rolled special steel PRIMAFLEX 

Online inquiry

Constant force springs tailored directly to your requirements - it’s easy to inquire online.

Guaranteed good advice

You can reach Mr Bastian Himmelsbach, your contact for the area of constant force springs, at

+49 (0) 7422 . 511 -434

bastian.himmelsbach@kern-liebers.de

Address
Hugo Kern und Liebers GmbH & Co. KG
Platinen- und Federnfabrik
Dr.-Kurt-Steim-Straße 35
78713 Schramberg - Deutschland