Formula symbols

Value

Unit

Description

Material

EN 10270-1

-

Type of material

Spring ends

Closed and ground

-

Spring ends

F

N

prestressed spring force

L1

mm

Prestressed spring length

s1

mm

Prestressed spring deflection

F

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

54

mm

unstressed spring length

Lk

mm

buckling length

Fn

106.837

N

maximum force in static use

Ln

26.64

mm

Minimum length in static use

sn

27.36

mm

Maximum spring deflection in static use

Fndyn

100.135

N

maximum force in dynamic use

Lndyn

28.36

mm

Minimum length in dynamic use

shdyn

13.59

mm

Maximum stroke in dynamic use

s

4.192

mm

pitch of spring

n

12.5

pc.

number of active coils

nt

pc.

total number of coils :

R

3.905

N/mm

Spring rate

Weight

8.0362

g

weight of one spring

Fntol

6.94

N

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

Fndtol

6.84

N

(+/-) tolerance of maximum dynamic force

Detol

0.3

mm

(+/-) tolerances of outer coil diameter

L0tol

1.37

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