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
0.25
mm
Wire diameter
Di
-
mm
Inner coil diameter
D
4.4
mm
Mean coil diameter
De
4.65
mm
Outer coil diameter
Dd
3.7
mm
maximum diameter of mandrel
Dh
5.1
mm
minimum diameter of bush
L0
8
mm
unstressed spring length
Lk
mm
buckling length
Fn
0.422
N
maximum force in static use
Ln
3.03
mm
Minimum length in static use
sn
4.97
mm
Maximum spring deflection in static use
Fndyn
0.39
N
maximum force in dynamic use
Lndyn
3.41
mm
Minimum length in dynamic use
shdyn
4.59
mm
Maximum stroke in dynamic use
S
1.341
mm
pitch of spring
n
5.5
pc.
number of active coils
nt
-
pc.
total number of coils
R
0.085
N/mm
Spring rate
Weight
0.0402
g
weight of one spring
Fntol
0.14
N
(+/-) tolerance of maximum force in static use
Fndtol
0.14
N
(+/-) tolerance of maximum dynamic force
Detol
0.3
mm
(+/-) tolerances of outer coil diameter
L0tol
1.57
mm
(+/-) tolerance of unstressed spring length
Price group
A
-
price group
F1tol
-
N
(+/-) tolerance of prestressed spring force
F2tol
-
N
(+/-) tolerance of loaded spring force