Constant Force Extension Springs

SPIROFLEX Constant Force Springs

Constant Force Extension Springs

SPIROFLEX constant force springs are available from a standard range or bespoke design.

SPIROFLEX constant force extension springs provide a huge range of application opportunities. Springs can be mounted on a bobbin or bush or free running in a cavity or recess. Springs can be joined or laminated to provide increased force with minimal increases in space requirements.

  • Spring width: 1.8 to 100 mm
  • Spring thickness: 0.05 to 1.0 mm
  • Material: Textured carbon and stainless steel
  • Service life: Up to 50,000 load cycles
    (typical applications require 5,000 ‚Äď 20,000 cycles)
  • Minimum hysteresis

Click on the button below to choose a spring to suit your requirement from our standard catalogue range of constant force extension springs.

Brush Springs    SR Range

Typical applications of SPIROFLEX constant force springs for tension and compression forces include:

  • Window balance systems
  • Spring balance systems
  • Point of purchase / Retail displays
  • Counterbalances
  • Car door pillar adjusters
  • Shutter doors return
  • Cable roll springs / Cable joint springs
  • Industrial washers / Dryers
  • Vending machines


Product group: Constant Force Extension Springs

Phone:+44 (0) 1427 676 136

Industry applications


Electrical engineering

Precision engineering

Consumer goods

Mechanical engineering and equipment manufacturing

Medical technology