Juin 1992
(extrait)
Tolerances on single wires.
|
NOMINAL Ø (Dd) d (mm)
|
Tolerances ( d) |
d < 0,070
0,070 < d < 2,250
2,250 < d < 4,400
d < 4,400 |
± 2 µm (*)
± 3 µm
± 4 µm
± 1 % of nominal diameter rounded to 1 µm with a maximum of
50 µm
*for mention
|
Tolerances on multi-wire diameter. The difference betwen the lock average diameter and the nominal
value must be conforme to the paragraphe 1 values.
The difference betwen each single wire diameter and the nominal value
must be conforme to the paragraphe 1 values x 2
Ovalisation on single wires.
Ø
Nominal
d (mm) |
MAXIMUM VALUE FOR
d max - d min (mm) |
| d > 0,070 |
twice the absolute value of the tolerance
for the same single wire diameter |
Note : There is no value for diameter under 0.070 mm , because they
are not subject to a direct mesure.
Electrical charactéristics.
Maximum values for resistances are calculated as shown under:
n = number of wire of the lock
d = diameter nominal value, (en mm).
Dd = tolerance maximum value as shown in table 1 (en mm).
r20 = annealed copper resistivity at 20°C (en W.mm².m-1) kr = coefficient
for metallurgical state of copper :
- Kr = 1 for annealed copper
wires
- Kr = 1,02for hard drawn copper
wires Ø > 6 mm
- Kr = for hard drawn copper
wires 1mm < Ø < 6mm
- Kr = for hard drawn copper
wires Ø < 1 mm
- Ke =coefficient for surface
influence on annealed tin plated copper wires :
(e = minimum tin thickness (free tin) in µm, value shown by table
6. This value cant be less than 0,3µm)
Tensil stress, elongation after break.
Hard drown copper
Nominal Ø
d (mm) |
Minimal stensile stress
MPa |
0,200 < d
< 0,100
1,000 < d < 1,120
1,120 < d < 1,500
1,500 < d < 2,000
2,000 < d < 2,500
2,500 < d < 3,000
3,000 < d < 3,550
3,550 < d < 4,000
4,000 < d < 4,500
4,500 < d < 5,000
5,000 < d < 10,000
10,000 < d < 13,200 |
460
460
442
430
418
403
392
380
372
363
363
353
|
Annealed wires
Nominal Ø
d (mm) |
Minimal elongation after tensil
break (%) |
d < 0,020
0,020 < d < 0,030
0,030 < d < 0,035
0,035 < d < 0,045
0,045 < d < 0,050
0,050 < d < 0,080
0,080 < d < 0,160
0,160 < d < 0,500
0,500 < d < 1,500
1,500 < d |
6
7
8
9
10
12
15
20
25
30 |
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