Could you/How do you calculate total number of coils based on the information below?
Rectangular wire helical spring 01
– Material dimensions: T0.6 x W2.0 mm
– Inner diameter: 6.3 mm
– Free length: 144 mm
– Number of active coils: ???
– Total number of coils: ???
– Work length of spring: 77.20 mm
– Load applied: 7.71 kg
Flad wire helical spring 02
– Material dimensions: T0.6 x W2.0 mm
– Inner diameter: 6.3 mm
– Free length: 139 mm
– Number of active coils: ???
– Total number of coils: ???
– Work length of spring: 71.30 mm
– Load applied: 8.16 kg
Dear Mr. Daniel,
Thank you very much for contacting us!
Please find attached the formula which you can use to calculate the number of active coils (Na).
In which,
– k: Spring constant, k = P/deflection. For example,
①7.71 kg÷77.20㎜＝0.01kgf/mm
②8.16 kg ÷71.3㎜＝0.11kgf/mm
– G: Transverse elastic modulus. (For each material’s transverse elastic modulus, please find more information here: https://www.tokaibane.com/en/spring-design/rectangular-wire-helical-springs-formulas)
– t: Material thickness
– b: Material width
– D: Coil mean diameter
We hope this helps. If you have any other questions, please let us know anytime!
Best regards,
Tokai Spring’s Support Team
