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S P R I N G C A L C U L A T I O N S
To Calculate Coil
Spring Rate-
| RATE= |
(9909 x material dia. x material dia. x
material dia. x material dia.) |
|
divided by |
|
(no. of active coils x mean dia. x mean dia.
x mean dia.) |
- Mean dia. = I.D. + material dia.
- All measurements are in millimetres
- Result is in N/mm
- To convert answer to Kg/mm = N/mm x 0.10192
To Calculate Coil Spring Stress-
| STRESS= |
(2.545 x rate(N/mm) x required travel x mean
dia. x Wahl factor) |
|
divided by |
|
(material dia. x material dia. x material
dia.) |
- Mean dia. = I.D. + material dia.
- C: (spring index) = mean dia. / material dia.
- Wahl factor = (C+0.2) / (C-1)
- All measurements are in millimetres
- Results is in N/mm˛ / MPa
- Stress not to exceed 827 N/mm˛ / MPa
For enquiries see contact
us.
Please note these formula are provided as
a guide only. Industrial Engineers & Spring Makers (Sales) Pty. Ltd provides no
guarantee to their accuracy. |
