Constant-force springs from KERN-LIEBERS fulfill different functions depending on the application.

 

Constant-force springs as torque generator

 

   

  • Width: 1.8 - 50 mm
  • Thickness: 0.05 - 1.0 mm
  • Material: texturized carbon and stainless steel
  • Up to 100 working turns 
  • Lifetime up to 50,000 cycles, typical applications require 5,000 - 15,000 cycles
  • Different torque characteristics:
    PROGRA - ascending (PROgressive GRAdient)
    MIGRA - constant (MInimum GRAdient)
    NEGRA - descending (NEgative GRAdient)
  • Low to medium torque range, minimum hysteresis
  • 2-axis system with storage and working reel
 

Areas of application:
To generate torque for drive and retraction power such as for cable retractors, balancers, etc. >> more information

 

Constant-force springs as force generator

 

     

  • Width: 1.8 - 100 mm
  • Thickness: 0.05 - 1.0 mm
  • Material: texturized carbon and stainless steel
  • Extraction length up to 5,000 mm
  • Lifetime up to 50,000 cycles, typical applications require 5,000 - 20,000 cycles
  • Different torque characteristics
    PROGRA - ascending (POsitive GRAdient)
    MIGRA - constant (MInimum GRAdient)
    NEGRA - descending (NEgative GRAdient)
  • Minimum hysteresis 
 

Areas of application:  

Automotive:

seatbelt height adjusters, push systems and glass roof sun shades >>more information 

Consumer:

weight balancers

 

With constant or variable force

 

    

  • Width: 3 – 180 mm
  • Thickness: 0.05 – 1 mm
  • Diameter: up to 100 mm
  • Surface: polished blue, bright, tempered, greased, coated
  • Application: Goods sliders, PoP displays, carbon brush systems,
    cable connectors, height adjusters, machinery equipment

 

We have special expertise in mounting complete spring assemblies.

 

    

Areas of Application:

Constant-force springs used as power or tension springs have an almost constant force for extensive torque.
But also a negative, variable or gradual change to the curve of the graph can occur. 

 

Constant-force springs / Double self-recoiling springs

KERN-LIEBERS USA supplies an extensive range of constant-force and double self-recoiling springs for the most diverse applications.

 

  

  • Dimensions: Strip width: 1.50 – 10.0 mm,  Strip thickness: 0.03 – 0.15 mm
  • Typers: Acc. to drawing
  • Material: Stainless spring steel strip
  • Packaging: Honeycomb packaging (deep-drawing), Pe-bags, boxes,
    special packaging (e.g. returnable container, etc.) 

 

 

 

  

Areas of Application:

Carbon brush systems, electrical industry, automotive industry.