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Formula symbols

Value

Unit

Description

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

1.6

mm

Wire diameter

Di

mm

Inner coil diameter

D

11.1

mm

Mean coil diameter

De

12.7

mm

Outer coil diameter

Dd

9

mm

maximum diameter of mandrel

Dh

13.3

mm

minimum diameter of bush

L0

41

mm

unstressed spring length

Lk

mm

buckling length

Fn

102.685

N

maximum force in static use

Ln

21.02

mm

Minimum length in static use

sn

19.98

mm

Maximum spring deflection in static use

Fndyn

95.94

N

maximum force in dynamic use

Lndyn

22.33

mm

Minimum length in dynamic use

shdyn

10.66

mm

Maximum stroke in dynamic use

S

4.147

mm

pitch of spring

n

9.5

pc.

number of active coils

nt

pc.

total number of coils

R

5.139

N/mm

Spring rate

Weight

6.3735

g

weight of one spring

Fntol

7.1

N

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

Fndtol

7

N

(+/-) tolerance of maximum dynamic force

Detol

0.3

mm

(+/-) tolerances of outer coil diameter

L0tol

1.08

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