F1

N

prestressed spring force

Mat

EN 10270-1

-

type of material

s2

mm

Loaded spring deflection

L2

mm

Loaded spring length

F2

N

Loaded spring force

Fdn

Closed and ground

-

spring ends

d

0.63

mm

Wire diameter

D

8

mm

Mean coil diameter

Dd

6.9

mm

maximum diameter of mandrel

De

8.63

mm

Outer coil diameter

Detol

0.3

mm

(+/-) tolerances of outer coil diameter

Dh

9.4

mm

minimum diameter of bush

F1tol

N

(+/-) tolerance of prestressed spring force

F2tol

N

(+/-) tolerance of loaded spring force

Fn

10.826

N

maximum force in static use

Fntol

0.77

N

(+/-) tolerance of maximum force in static use

Lk

39.56

mm

buckling length

L0

55

mm

unstressed spring length

L0tol

2.41

mm

(+/-) tolerance of unstressed spring length

L1

mm

Prestressed spring length

Ln

11.83

mm

Minimum length in static use

s1

mm

Prestressed spring deflection

sn

43.17

mm

Maximum spring deflection in static use

S

4.35

mm

pitch of spring

n

12.5

pc.

number of active coils

nt

pc.

total number of coils

R

0.251

N/mm

Spring rate

Fndyn

10.487

N

maximum force in dynamic use

Fndtol

0.76

N

(+/-) tolerance of maximum dynamic force

Lndyn

13.18

mm

Minimum length in dynamic use

shdyn

14.89

mm

Maximum stroke in dynamic use

Gew

0.898

g

weight of one spring