419
Loop position
Please enter one of the four
positions (0°, 90°, 180°, 270°) or
loop
the required torsion angle between the .
loops
Production compensation
Normally we use the initial tension "F0" to compensate to be able to meet the extension
spring requirements.
Fixed parameters
Compensated by
One spring force, respective length of tensioned spring and L0
1. F0
One spring force, respective length of the tensioned spring and F0 2. L0,n,d
One spring force, respective length of the tensioned spring and F0 3. L0,D
Two spring forces and respective lengths of the tensioned springs 4. L0,n,d
Two spring forces and respective lengths of the tensioned springs 5. F0,D
Tolerances
Select the quality grade for the
extension
exten
springs. Our
sion
springs are usually manufactured to
DIN 2097 Grade 2 as standard. If
you select Grade 1, your extension
spring is manufactured according
to the smallest tolerance range, and
for Grade 3 with the largest toler-
ance range.
Material
Please select one of the materials given or enter another
material from thematerial table on page 8.
Coiling direction
Loop shape
Go to page of the catalogue to select the
shape.
415
loop
Please do not forget to specify the additional information for the
individual
shapes e.g. for the "1/1 German " the values
loop
loop
for "Lh" and "m".
Surface treatment
The disadvantage of all later surface treatment methods for the
extension springs is that application of a protective coating to
the coils is only possible at extremely high cost due to the initial
stress of the spring body. Here, the selection of a suitable
material should be preferred to later surface treatment. Select a
surface treatment frompage 13 if required.
Extension springs
0 degree
90 degree
270 degree
torsion angle
180 degree
d mm wire diameter
De mm outer coil diameter
Dh mm minimum bush diameter
Lk mm length of relaxed spring body
L0 mm unstressed spring length
Lh mm loop height
m mm loop opening width
n pc.
number of active coils
nt pc.
total number of coils
F0 N initial tension
F1 N prestressed spring force
F2 N loaded spring force
Fn N maximum spring force
L1 mm prestressed spring length
L2 mm loaded spring length
Ln mm maximum spring length
s1 mm prestressed spring deflection
s2 mm loaded spring deflection
sn mm maximum spring deflection
sh mm excursion
R N/mm spring rate
right
left
Determine application
To be able to determine the spring characteristics exactly,
please complete all 5 boxes.
Load total =Total number of stress reversals
Load frequency=Number of stress reversals per minute
Excursion=Length of working travel "sh" (stroke)
Working environment=Around the spring (water, oil, air...)
Application temperature=Temperature the spring is exposed to
Test certificate
DIN EN 10204-2.1 free of charge
DIN EN 10204-2.2 EUR 15,34
DIN EN 10204-3.1 EUR 30,68
