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

Lc

Solid length

Ln_static

Minimum permissible working length (static)

Ln_dynamic

Minimum permissible working length (dynamic)


Load

Fc

Solid load


Stress

Tauc

Solid stress (uncorrected)

Taukc

Solid stress (corrected)

k

Stress correction factor


Dimensions

d

Wire diameter

De

Outside diameter

Di

Inside diameter

D

Mean coil diameter

p  or  m

Pitch


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

Lmin  or  Lmax

Shortest or longest working length

smin  or  smax

Shortest or longest working deflection


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

dtol

Wire diameter tolerance

e1tol

Squareness tolerance

e2tol

Parallelism tolerance