Squareness Tolerances

G & O Spring tips – Squareness Tolerances

  • spring squareness tolerances
  • Problems with non-axial forces?

    Squareness of compression springs is important and whilst by no means the deciding factor for non axial forces a spring that stands square will perform better in this regard. All compression springs should be able to stand square without rocking and we suggest standard Squareness & Bow tolerances (intended to keep non axial forces to a minimum) of 1° (in some cases this can be as little as 1/2°).

    Squareness (E1) is difficult to accurately measure without a specialist optical system and we recommend that tolerances should ideally be shown on the drawing as a maximum dimension and not in degrees. To aid you with the calculations (where your legacy drawings show squareness in degrees) we have included a handy little calculator so you can check your springs comply.

    Visit our squareness calculator

    Talk to us about optical spring measurement.


    • cert_as9100
    • cert_nadcap
    • cert_ads21
    • cert_cyber-essentials
    • cert_disability
    • Joscar Registered
    • Make UK
    aeroplane on runway
    G&O continue to provide an excellent service, meeting quality requirements and ensuring customer satisfaction, whether that is issue resolution or general enquiries. Ross Mitchinson Supplier Lead - Moog Aircraft Group
    Chat with G&O