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
0.63
mm
Wire diameter
Di
-
mm
Inner coil diameter
D
3.37
mm
Mean coil diameter
De
4
mm
Outer coil diameter
Dd
2.4
mm
maximum diameter of mandrel
Dh
4.4
mm
minimum diameter of bush
L0
5.5
mm
unstressed spring length
Lk
1000
mm
buckling length
Fn
20.605
N
maximum force in static use
Ln
3.78
mm
Minimum length in static use
sn
1.72
mm
Maximum spring deflection in static use
Fndyn
18.57
N
maximum force in dynamic use
Lndyn
3.95
mm
Minimum length in dynamic use
shdyn
0.72
mm
Maximum stroke in dynamic use
S
1.391
mm
pitch of spring
n
3.5
pc.
number of active coils
nt
-
pc.
total number of coils
R
11.98
N/mm
Spring rate
Weight
0.1435
g
weight of one spring
Fntol
2.73
N
(+/-) tolerance of maximum force in static use
Fndtol
2.7
N
(+/-) tolerance of maximum dynamic force
Detol
0.15
mm
(+/-) tolerances of outer coil diameter
L0tol
0.2
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