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
0.55
mm
Wire diameter
Di
mm
Inner coil diameter
D
4.45
mm
Mean coil diameter
De
5
mm
Outer coil diameter
Dd
3.5
mm
maximum diameter of mandrel
Dh
5.5
mm
minimum diameter of bush
L0
18
mm
unstressed spring length
Lk
mm
buckling length
Fn
14.064
N
maximum force in static use
Ln
6.7
mm
Minimum length in static use
sn
11.3
mm
Maximum spring deflection in static use
Fndyn
13.491
N
maximum force in dynamic use
Lndyn
7.16
mm
Minimum length in dynamic use
shdyn
2.9
mm
Maximum stroke in dynamic use
S
2.053
mm
pitch of spring
n
8.5
pc.
number of active coils
nt
pc.
total number of coils
R
1.245
N/mm
Spring rate
Weight
0.2757
g
weight of one spring
Fntol
0.93
N
(+/-) tolerance of maximum force in static use
Fndtol
0.92
N
(+/-) tolerance of maximum dynamic force
Detol
0.25
mm
(+/-) tolerances of outer coil diameter
L0tol
0.58
mm
(+/-) tolerance of unstressed spring length
Price group
C
-
price group
F1tol
N
(+/-) tolerance of prestressed spring force
F2tol
N
(+/-) tolerance of loaded spring force