Extension spring symbols
The tables below describes the symbol nomenclature you can use when calculating your own equations/variables. Please note:.
- All labels are case sensitive
- Values returned are in metric units
Length |
|
L0 |
Free length |
Lk |
Body length |
Load |
|
F0 |
Initial tension |
Stress |
|
k |
Stress correction factor |
Dimensions |
|
d |
Wire diameter |
De |
Outside diameter |
Di |
Inside diameter |
D |
Mean coil diameter |
p |
Pitch |
m |
Hook gap/opening |
Other factors |
|
nt |
Total coils |
n |
Active coils |
nd |
Dead coils |
w |
Spring index |
R |
Spring rate |
Lw |
Wire length |
M |
Mass of single spring |
M100 |
Mass of 100 springs |
M1000 |
Mass of 1000 springs |
Material properties |
|
G |
Rigidity modulus |
E |
Young's modulus |
ro |
Density |
Working positions |
|
L1 or L2 |
Length at position 1 or 2 |
F1 or F2 |
Load at position 1 or 2 |
s1 or s2 |
Deflection at position 1 or 2 |
Tau1 or Tau2 |
Uncorrected stress at position 1 or 2 |
Tauk1 or Tauk2 |
Corrected stress at position 1 or 2 |
Tolerances Note: for most of these values, it will depend on the currently selected tolerance grade. If this is "None", the result will be zero. |
|
F1tol or F2tol |
Load tolerance at position 1 or 2 |
L0tol |
Free length tolerance |
Dtol |
Coil diameter tolerance |