In the appendix of part 1, extended in 2009, general zone restrictions for machines
which are not separately dealt with in other parts of the standard are specified.
v
ef
f
1
0
–
1
00
0
H
z
45 mm/s
28 mm/s
18 mm/s
14.7 mm/s
Zone
C/D
4.5 – 14.7
mm/s
11.2 mm/s
9.3 mm/s
Zone
B/C
1.8 – 9.3
mm/s
7.1 mm/s
4.5 mm/s
Zone
A/B
0.71 – 4.5
mm/s
2.8 mm/s
1.8 mm/s
1.12 mm/s
0.71 mm/s
0.45 mm/s
0.28 mm/s
D
Risk of machine damage
C
Restricted continued operation
B
Unrestricted operation possible
A
Newly operating machine
Table 1: Typical zone limit values for vibration severity according to ISO 10816-1.
In the standard it is pointed out that small machines, for example electric motors
with a power rating of up to 15 kW, tend to lie around the lower zone limits,
whereas large machines, for example motors with flexible foundations, lie around
the upper zone limits.
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