30
ISO 10816 Part 3
Part 3 treats most of the common industrial machines and is divided into four groups. Further criteria for
Part 3 are the rigidity of the foundation and the rotational speed. Concrete foundations are rigid, every
thing else falls under flexible. The RPM affects the lower measuring range as well as the limit values.
Support class
Condition
DISP
VEL
Zone boundary RMS displacement
RMS velocity
µm mils
mm/s in/s
Rigid
Green / Yellow
57
2.24
4.5
0.18
Yellow / Red
90
3.54
7.1
0.28
Flexible
Green / Yellow
90
3.54
7.1
0.28
Yellow / Red
140
5.51
11.0
0.43
Group 1
Evaluation zone boundaries for machines of Group 1: Large machines with rated power above 300 kW
and not more than 50 MW; electrical machines with shaft height H ≥315 mm.
Support class
Condition
DISP
VEL
Zone boundary RMS displacement
RMS velocity
µm mils
mm/s in/s
Rigid
Green / Yellow
45
1.77
2.8
0.08
Yellow / Red
71
2.80
4.5
0.18
Flexible
Green / Yellow
71
2.80
4.5
0.18
Yellow / Red
113
4.45
7.1
0.28
Group 2
Evaluation zone boundaries for machines of Group 2: Medium-size machines with rated power above
15 kW up to and including 300 kW; electrical machines with shaft height 160 mm ≤ H <315 mm.
Support class
Condition
DISP
VEL
Zone boundary RMS displacement
RMS velocity
µm mils
mm/s in/s
Rigid
Green / Yellow
36
1.42
4.5
0.18
Yellow / Red
56
2.20
7.1
0.28
Flexible
Green / Yellow
56
2.20
7.1
0.28
Yellow / Red
90
3.54
11.0
0.43
Group 4
Evaluation zone boundaries for machines of Group 4: Pumps with multivane impeller and with integrated
driver (centrifugal, mixed flow or axial flow) with rated power above 15 kW.
Support class
Condition
DISP
VEL
Zone boundary RMS displacement
RMS velocity
µm mils
mm/s in/s
Rigid
Green / Yellow
22
0.87
2.8
0.08
Yellow / Red
36
1.42
4.5
0.18
Flexible
Green / Yellow
36
1.42
4.5
0.18
Yellow / Red
56
2.20
7.1
0.28
Group 3
Evaluation zone boundaries for machines of Group 3: Pumps with multivane impeller and with separate
driver (centrifugal, mixed flow or axial flow) with rated power above 15 kW.
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