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
2.5
mm
Wire diameter
Di
mm
Inner coil diameter
D
12.5
mm
Mean coil diameter
De
15
mm
Outer coil diameter
Dd
9.4
mm
maximum diameter of mandrel
Dh
15.7
mm
minimum diameter of bush
L0
22
mm
unstressed spring length
Lk
mm
buckling length
Fn
410.229
N
maximum force in static use
Ln
14.95
mm
Minimum length in static use
sn
7.05
mm
Maximum spring deflection in static use
Fndyn
355.107
N
maximum force in dynamic use
Lndyn
15.9
mm
Minimum length in dynamic use
shdyn
2.25
mm
Maximum stroke in dynamic use
S
5.571
mm
pitch of spring
n
3.5
pc.
number of active coils
nt
pc.
total number of coils
R
58.214
N/mm
Spring rate
Weight
8.3806
g
weight of one spring
Fntol
35.31
N
(+/-) tolerance of maximum force in static use
Fndtol
34.79
N
(+/-) tolerance of maximum dynamic force
Detol
0.3
mm
(+/-) tolerances of outer coil diameter
L0tol
0.5
mm
(+/-) tolerance of unstressed spring length
Price group
F
-
price group
F1tol
N
(+/-) tolerance of prestressed spring force
F2tol
N
(+/-) tolerance of loaded spring force