Torsion Spring Measurements - How to Measure a Torsion Spring

banner showing different torsion springs with different dimensions

When measuring your torsion spring, you must know the following dimensions:

  • Direction of WInd
  • Outer Diameter
  • Inner Diameter
  • Wire Diameter
  • Leg Length 1
  • Leg Length 2
  • Body Length
  • Total Coils

Please see graphic to the right for more help.

Springs are accurately measured with a dial caliper. The reason for this is because a caliper provides you with a more exact measurement. Wondering why this is so important? Well, take your spring's wire diameter as an example. In most cases, even if the spring's wire diameter is off by 0.001" it'll affect your spring's rate and travel.