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
3.5
mm
Mean coil diameter
De
4
mm
Outer coil diameter
Dd
2.7
mm
maximum diameter of mandrel
Dh
4.4
mm
minimum diameter of bush
L0
10.4
mm
unstressed spring length
Lk
mm
buckling length
Fn
7.709
N
maximum force in static use
Ln
5.99
mm
Minimum length in static use
sn
4.41
mm
Maximum spring deflection in static use
Fndyn
7.058
N
maximum force in dynamic use
Lndyn
6.36
mm
Minimum length in dynamic use
shdyn
3.01
mm
Maximum stroke in dynamic use
S
1.165
mm
pitch of spring
n
8.5
pc.
number of active coils
nt
pc.
total number of coils
R
1.747
N/mm
Spring rate
Weight
0.1792
g
weight of one spring
Fntol
0.89
N
(+/-) tolerance of maximum force in static use
Fndtol
0.88
N
(+/-) tolerance of maximum dynamic force
Detol
0.15
mm
(+/-) tolerances of outer coil diameter
L0tol
0.44
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