In part 3 of the ISO 10816, revised in 2009, the zone borders for the vibration veloc-
ity of machines with a power of 15 kW to 50 MW are specified (2).
Machine type
Large machines with 300
kW to 50 MW
Medium sized machines
with 15 to 300 kW
Electric motors with a
shaft height above 315
mm
Electric motors with a
shaft height between
160 and 315 mm
Foundation
flexible
rigid
flexible
rigid
v
ef
f
1
0
–
1
00
0
H
z
> 11 mm/s
D
D
D
D
> 7.1 mm/s
C
D
D
D
> 4.5 mm/s
B
C
C
D
> 3.5 mm/s
B
B
B
C
> 2.8 mm/s
A
B
B
C
> 2.3 mm/s
A
B
B
B
> 1.4 mm/s
A
A
A
B
< 1.4 mm/s
A
A
A
A
D
Risk of machine damage
C
Restricted operation
B
Unrestricted long-term operation possible
A
Newly commissioned
Table 2: Vibration velocity classification in accordance with ISO 10816-3
17
