Formula symbolsValueUnitDescription
Material
EN 10270-1
-
Type of material
Spring ends
Closed
-
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
0.32
mm
Wire diameter
Di
mm
Inner coil diameter
D
3.2
mm
Mean coil diameter
De
3.52
mm
Outer coil diameter
Dd
2.4
mm
maximum diameter of mandrel
Dh
4
mm
minimum diameter of bush
L0
28.6
mm
unstressed spring length
Lk
24.26
mm
buckling length
Fn
3.538
N
maximum force in static use
Ln
8.52
mm
Minimum length in static use
sn
20.08
mm
Maximum spring deflection in static use
Fndyn
3.408
N
maximum force in dynamic use
Lndyn
9.26
mm
Minimum length in dynamic use
shdyn
6.57
mm
Maximum stroke in dynamic use
S
1.503
mm
pitch of spring
n
18.5
pc.
number of active coils
nt
pc.
total number of coils
R
0.176
N/mm
Spring rate
Weight
0.131
g
weight of one spring
Fntol
0.26
N
(+/-) tolerance of maximum force in static use
Fndtol
0.26
N
(+/-) tolerance of maximum dynamic force
Detol
0.2
mm
(+/-) tolerances of outer coil diameter
L0tol
1.17
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