SIEMENS
1/8
Siemens MD 50.8 · 2017
Introduction
Guidelines for selection and ordering
Notes on selection tables
1
■
Structure of the tables for geared motors
In the selection tables you will find the most frequently used
versions and combinations of geared motors sorted according
to the motor power.
Additional combinations can be selected with our
DT Configurator.
The power ratings and torques specified in the catalog refer to
mounting position M1 and comparable types of construction
where the input stage does not run completely immersed in oil.
Further, standard equipment and standard lubrication of the
geared motors as well as normal ambient conditions are
assumed.
The specified output speeds are guide values.
You can calculate the rated input speed based on the rated
motor speed and the transmission ratio. Please note that the
actual output speed will depend on the motor load and the line
supply conditions.
■
Structure of the tables for transmission ratios and torques
In the selection tables for transmission ratios and torques, the
gearboxes are sorted according to gearbox type and ratio.
P
rated
n
2
T
2
i
F
R2
1)
F
R2
90
1)
F
R2
270
1)
f
B
m
Article No.
Order code
kW
rpm
Nm
-
N
N
N
-
kg
(Article No. supplement
below)
Number of poles
0.12
Type designation BH.29-LA63ME4
27
43
50.26
7 500
7 500
7 500
2.1
9
2KJ3803
-
7
BC11
-
7
7
R1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(1)
Rated motor power at 50 Hz
(2)
Geared motor output speed
(3)
Geared motor output torque
(4)
Transmission ratio
(5)
Permissible radial force, optional force application angle
(6)
Permissible radial force, force application angle 90 °
(7)
Permissible radial force, force application angle 270 °
(8)
Service factor
(9)
Drive weight without any oil
(10)
Article No.
(11)
Order code for number of poles
1)
Values apply to BH.39 for 30 x 50 solid shaft. For conversion for 25 x 35 solid shaft,
see page 2/9
.
i
n
2
T
2N
F
R2
F
R2
90
F
R2
270
J
G
R
ex
Motor frame size
Article No.
-
rpm
Nm
N
N
N
10
-4
kgm²
-
63
71
80
90
100
112
Type designation BH.29
50.26
29
90
7 340
7 500
7 500
0.04
4071/81
✓
✓
2KJ3803
-
77777
-
77
R1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(1)
Transmission ratio
(2)
Geared motor output speed at a motor speed of 1 450 rpm
(3)
Maximum gearbox output torque
with service factor of
f
B
= 1
(4)
Permissible radial force, optional force application angle
(5)
Permissible radial force, force application angle 90 °
(6)
Permissible radial force, force application angle 270 °
(7)
Moment of inertia of the gearbox reduced to the input shaft
(8)
Ratio, number of teeth
(9)
Geometrically possible geared motor combination
(10)
Article No.
© Siemens AG 2017