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
0.4
mm
Wire diameter
Di
mm
Inner coil diameter
D
6.6
mm
Mean coil diameter
De
7
mm
Outer coil diameter
Dd
5.7
mm
maximum diameter of mandrel
Dh
7.9
mm
minimum diameter of bush
L0
35.8
mm
unstressed spring length
Lk
15.29
mm
buckling length
Fn
4.254
N
maximum force in static use
Ln
5.32
mm
Minimum length in static use
sn
30.48
mm
Maximum spring deflection in static use
Fndyn
4.162
N
maximum force in dynamic use
Lndyn
5.98
mm
Minimum length in dynamic use
shdyn
6.51
mm
Maximum stroke in dynamic use
S
5.354
mm
pitch of spring
n
6.5
pc.
number of active coils
nt
pc.
total number of coils
R
0.14
N/mm
Spring rate
Weight
0.1751
g
weight of one spring
Fntol
0.36
N
(+/-) tolerance of maximum force in static use
Fndtol
0.35
N
(+/-) tolerance of maximum dynamic force
Detol
0.35
mm
(+/-) tolerances of outer coil diameter
L0tol
2.09
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