Constant-force spring
KERN-LIEBERS
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.
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
Consumer: weight balancers
