Formula symbolsValueUnitDescription
Material
EN 10270-1
-
Type of material
Spring ends
Closed and ground
-
Spring ends
F1
N
prestressed spring force
L1
mm
Prestressed spring length
s1
mm
Prestressed spring deflection
F2
N
Loaded spring force
L2
mm
Loaded spring length
s2
mm
Loaded spring deflection
d
0.5
mm
Wire diameter
Di
mm
Inner coil diameter
D
4.5
mm
Mean coil diameter
De
5
mm
Outer coil diameter
Dd
3.4
mm
maximum diameter of mandrel
Dh
5.6
mm
minimum diameter of bush
L0
37
mm
unstressed spring length
Lk
30.22
mm
buckling length
Fn
9.329
N
maximum force in static use
Ln
12.3
mm
Minimum length in static use
sn
24.7
mm
Maximum spring deflection in static use
Fndyn
8.94
N
maximum force in dynamic use
Lndyn
13.33
mm
Minimum length in dynamic use
shdyn
8.34
mm
Maximum stroke in dynamic use
S
1.973
mm
pitch of spring
n
18.5
pc.
number of active coils
nt
pc.
total number of coils
R
0.378
N/mm
Spring rate
Weight
0.4498
g
weight of one spring
Fntol
0.62
N
(+/-) tolerance of maximum force in static use
Fndtol
0.62
N
(+/-) tolerance of maximum dynamic force
Detol
0.25
mm
(+/-) tolerances of outer coil diameter
L0tol
1.28
mm
(+/-) tolerance of unstressed spring length
Price group
B
-
price group
F1tol
N
(+/-) tolerance of prestressed spring force
F2tol
N
(+/-) tolerance of loaded spring force