blog

Constant Force Springs Size Guide & Specifications

DYN Fasteners provides precision-engineered constant force springs suitable for applications requiring uniform force over a long travel. These springs are ideal for mechanical devices, counterbalances, and precision equipment.

Standard Constant Force Springs

Size Range (Free Length) Wire Diameter (mm) Outer Diameter (OD) (mm) Inner Diameter (ID) (mm) Thickness (T) (mm) Radius of Curvature (R) (mm) Maximum Load (N) Compressed Length (mm)
Small Constant Force Springs 0.10 – 1.00 5 – 20 3 – 15 0.10 – 0.30 2 – 5 1 – 50 5 – 50
Medium Constant Force Springs 1.00 – 3.00 20 – 50 10 – 40 0.30 – 0.80 5 – 12 50 – 200 50 – 150
Large Constant Force Springs 3.00 – 6.00 50 – 100 40 – 90 0.80 – 1.50 12 – 25 200 – 500 150 – 500
Custom Sizes Custom sizes available on request, ensuring that we can meet your specific project requirements.

Key Features

  • Delivers consistent force throughout the spring's travel
  • High-quality materials for durability and long service life
  • Available in a wide range of diameters, thicknesses, and lengths
  • Custom sizes can be manufactured to suit specific project needs
  • Ideal for precision mechanical, counterbalance, and automation applications

DYN Fasteners ensures all constant force springs meet rigorous standards for performance, reliability, and safety.