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
4
mm
Mean coil diameter
De
4.32
mm
Outer coil diameter
Dd
3.2
mm
maximum diameter of mandrel
Dh
4.8
mm
minimum diameter of bush
L0
5.5
mm
unstressed spring length
Lk
mm
buckling length
Fn
3.465
N
maximum force in static use
Ln
1.87
mm
Minimum length in static use
sn
3.63
mm
Maximum spring deflection in static use
Fndyn
3.376
N
maximum force in dynamic use
Lndyn
1.96
mm
Minimum length in dynamic use
shdyn
0.81
mm
Maximum stroke in dynamic use
S
2.686
mm
pitch of spring
n
1.75
pc.
number of active coils
nt
pc.
total number of coils
R
0.954
N/mm
Spring rate
Weight
0.03
g
weight of one spring
Fntol
0.38
N
(+/-) tolerance of maximum force in static use
Fndtol
0.38
N
(+/-) tolerance of maximum dynamic force
Detol
0.2
mm
(+/-) tolerances of outer coil diameter
L0tol
0.35
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