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- Spring
manufacters Co.
- Industry
Street
- New
York
- Customer
Company: Bill's Company
- Address:
Steel street 44
- Descrizione:
Special spring
- Code
number: az776655
- Descr.aux.:
Prototype
- Descr.aux.:Only
for test
- Wire
diameter 1.4 [mm]
- Mean
diameter 9.2 [mm]
- I.
diameter 7.8 [mm]
- O.
diameter 10.6 [mm]
- Free
length L0 26 [mm]
- Initial
work. length L1 25 [mm]
- Working
length L2 24 [mm]
- Solid
length Lb 8.92 [mm]
- f1:
1 [mm]
- f2:
2 [mm]
- fb:
17.1 [mm]
- fk:
13.2 [mm]
- Rate
10 [N/mm]
- Active
coils 4.87
- Total
coils 6.87
- Initial
work. stress t1 105 [N/mm^2]
- Working
stress t2 210 [N/mm^2]
- Solid
stress tb 1790 [N/mm^2]
- Initial
work. load F1 10 [N]
- Working
load F2 20 [N]
- Solid
load Fb 171 [N]
- Stress
ratio 10.5 [N/mm^2 / N]
- Envelope
200 [mm] Mass 2.42 [g]
- Natural
frequency 1210 [Hz]
- Solid
diameter increasing 0.0342 [mm]
- Setting
0 [mm]
- Spring
index 6.57
- Pitch
4.91 [mm]
- Pitch
angle 9.63 [°]
- Material
: Steel class A UNI 3823
- Shot
peening
- Galvanisation
- Right
hand Tapered end, closed & ground
- TOLERANCES
AND NOTES
- Total
number of coils, tolerance = ± 0.344
- Wire
diameter, tolerance = ± 0.024 mm
- I.D.,
tolerance = ± 0.15 mm
- O.D.,
tolerance = ± 0.15 mm
- Free
length, tolerance = ± 0.762 mm
- Squareness,
tolerance e1 = 0.78 mm
- Parallelism,
tolerance e2 = 0.159 mm
- Initial
working load F1, tolerance ± 7.71 N
- Working
load F2, tolerance ± 7.81 N
- d
min 1.4 [mm]
- d
max 1.4 [mm]
- Min.
I. Diameter 7.8 [mm] (with wire tolerance)
- Max.
I. Diameter 7.8 [mm] (with wire tolerance)
- Min.
O. Diameter 10.6 [mm] (with wire tolerance)
- Max.
O. Diameter 10.6 [mm] (with wire tolerance)
- Cold
coiling
- Spring
class FF
- Precision
rate 1
- NOTES
- Designed
(or checked) for applications with infinite cycles ( > 10E6 cycles )
- IT
PASSES the lateral stability test
- n=1
- fk=
13.2 [mm]
- Safety
factor used to check the maximum limit stress: 1.3
- Spring
calculated at 20 °C
- Material
density: 7.86 Kg/dm^3
- Modulo
di elasticità tangenziale del materiale: 79000 MPa Limit stress: 830
[N/mm^2]
- Considerato
un rapporto fra la tensione a Torsione limite per fatica alternata ed
il carico di rottura a trazione Rm di: 0.125
- Rapporto
Rp02: 0.85
- Considerato
un rapporto fra la tensione a Torsione Ammissibile ed il carico di rottura
a trazione Rm di: 0.7
- Minimum
spring index 3
- Maximum
spring index 20
- Calculated
spring index 6.57
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