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
3.2
mm
Wire diameter
Di
mm
Inner coil diameter
D
25
mm
Mean coil diameter
De
28.2
mm
Outer coil diameter
Dd
21
mm
maximum diameter of mandrel
Dh
29.3
mm
minimum diameter of bush
L0
63.5
mm
unstressed spring length
Lk
mm
buckling length
Fn
449.094
N
maximum force in static use
Ln
27.37
mm
Minimum length in static use
sn
36.13
mm
Maximum spring deflection in static use
Fndyn
397.773
N
maximum force in dynamic use
Lndyn
31.5
mm
Minimum length in dynamic use
shdyn
11.96
mm
Maximum stroke in dynamic use
S
10.964
mm
pitch of spring
n
5.5
pc.
number of active coils
nt
pc.
total number of coils
R
12.43
N/mm
Spring rate
Weight
37.4474
g
weight of one spring
Fntol
23.38
N
(+/-) tolerance of maximum force in static use
Fndtol
23.07
N
(+/-) tolerance of maximum dynamic force
Detol
0.35
mm
(+/-) tolerances of outer coil diameter
L0tol
1.34
mm
(+/-) tolerance of unstressed spring length
Price group
M
-
price group
F1tol
N
(+/-) tolerance of prestressed spring force
F2tol
N
(+/-) tolerance of loaded spring force