Strip springs
Two out of three cars produced worldwide are fitted with parts produced in KERN-LIEBERS group. Over 90% of the cars produced in India are fitted with our parts.
Power springs
As a global market leader, the KERN-LIEBERS group of companies manufactures and supplies the full range of power springs, from the smallest to the largest.
- Spring width: 1.8 – 100 mm
- Spring thickness: 0.05 – 3.0 mm
- Material: Martensitic steels and special alloys, textured carbon and stainless steels
- Service life: Up to 500,000 load cycles
(typical applications require 100,000 – 200,000 cycles) - Up to 50 working rotations
- Flat characteristic curve in the work area, low hysteresis
The special feature of the Maximo power spring is that the combination of winding forward and then back increases the power density, making maximum use of the available material properties. The machinery and equipment required for this special process is developed and built internally at KERN-LIEBERS.
- Spring width: 1.8 – 100 mm
- Spring thickness: 0.05 – 0.55 mm
- Material: Textured carbon and stainless steels
- Service life: Up to 500,000 load cycles
(typical applications require 100,000 – 200,000 cycles) - Up to 50 working rotations
- Flat characteristic curve in the work area, low hysteresis
- The material volume is fully exploited at maximum torque
- Characteristic S-shape in unwound exposed position
Typical applications of Maximo springs include:
- Seat belts
- Dog leashes
- Cable retractors
- Roller blind drives of all types
- Measuring tapes
The classic power spring retains its importance until today. Power springs are used where space constraints and the size of the spring do not allow the use of Maximo springs, or where they are required by specific customer applications.
These springs are wound by machines developed and built by KERN-LIEBERS.
- Spring width: 1.8 – 100 mm
- Spring thickness: 0.05 – 3.0 mm
- Material: Martensitic spring strip steels, textured carbon and stainless steels
- Service life: Very long, depending on the design
- Up to 30 working rotations
Typical applications of power springs include:
- Cable and hose retractors
- Fall protection devices
- Balancers
- Actuators
- Starter springs in small clockwork motors
- Timepieces
- Overhead line systems
Industry applications
Automotive
Mechanical engineering and equipment manufacturing