SIEMENS
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Siemens NC 62 · 2016
SIMOTICS motors
Technical definitions for AC motors
6
■
Overview
(continued)
Radial eccentricity tolerance of shaft in relation to
housing axis
referred to cylindrical shaft extensions
Concentricity and axial eccentricity tolerance of the flange
surface relative to the shaft axis
(referred to the centering diameter of the mounting flange)
Vibration severity and vibration severity grade A
in accordance with IEC 60034-14
The vibration severity is the RMS value of the vibration velocity
(frequency range from 10 to 1000 Hz). The vibration severity is
measured using electrical measuring instruments in compliance
with DIN 45666.
The values indicated refer only to the motor. These values can
increase as a result of the overall system vibrational behavior
due to installation.
Vibration severity limit values for shaft heights 20 to 132
The speeds of 1800 rpm and 3600 rpm and the associated limit
values are defined in accordance with IEC 60034-14. The
speeds of 4500 rpm and 6000 rpm and the specified values are
defined by the motor manufacturer.
The motors maintain vibration severity grade A up to rated
speed.
Vibration severity limit values for shaft heights 160 to 355
Shaft height
Tolerance
N
Tolerance
R
Tolerance
SPECIAL
SH
mm (in)
mm (in)
mm (in)
28/36
0.035 (0.00138)
0.018 (0.00071)
–
48/63
0.04 (0.00157)
0.021 (0.00083)
–
80/100/132
0.05 (0.00197)
0.025 (0.00098)
0.01 (0.00039)
160/180/225
0.06 (0.00236)
0.03 (0.00118)
0.01/–/– (0.00039)/–/–
280
0.07 (0.00276)
0.035 (0.00138)
–
355
0.08 (0.00315)
0.04 (0.00157)
–
Shaft height
Tolerance
N
Tolerance
R
Tolerance
SPECIAL
SH
mm (in)
mm (in)
mm (in)
28/36/48
0.08 (0.00315)
0.04 (0.00157)
–
63/80/100
0.1 (0.00394)
0.05 (0.00197)
–/0.03/0.04
(-/0.00118/0.00157)
132/160/
180/225
0.125 (0.00492)
0.063 (0.00248)
0.04/0.04/–
(0.00157/0.00157)–
280/355
0.16 (0.00630)
0.08 (0.00315)
–
L
L/2
G_DA65_EN_00063b
Test: radial eccentricity
dial gauge
motor shaft
motor
10 mm
10 mm
(0.39 in)
(0.39 in)
G_DA65_EN_00064c
Test: concentricity
Test: axial eccentricity
motor
dial gauge
dial gauge
motor
motor shaft
motor shaft
4
000
8
000
12
000
16
000
20
000
0
0
1
2
3
4
G_PM21_EN_00185
[rpm]
Drive speed
n
Domain of definition
(Rated speeds)
Vibration rate
V
eff
[mm/s]
Grade R
Grade N
Grade S
Grade A
Grade B
Grade SR
0.5
1.5
2.5
3.5
Grade SPECIAL
2
000
0
0
1
2
3
4
10
000
8
000
6
000
4
000
G_PM21_EN_00186
Domain of definition
(Rated speeds)
[rpm]
Drive speed
n
Vibration rate
V
eff
[mm/s]
Grade R
Grade S
Grade A
Grade B
Grade SR
0.5
1.5
2.5
3,5
4.5
Grade SPECIAL
© Siemens AG 2016
