SIEMENS
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Siemens MD 50.8 · 2017
Configuring guide
Configuring a gearbox
2
■
Required torque
Once the load situation (drive data) and the service factor have
been clarified, then the required output torque can be
determined.
■
Input speed
For an identical power and output speed, in the selection tables
4-pole geared motors have priority over 6-pole motors.
As result of the very wide range of transmission ratios of
SIMOGEAR gearboxes, it is hardly necessary to use motors with
other pole numbers. In addition to good availability worldwide,
4-pole motors generally offer the optimum solution regarding
price, length, noise level and service life.
Code
Description
Unit
Gearbox efficiency
%
i
Transmission ratio
-
n
1
Input speed of the gearbox
rpm
n
2
Output speed of the gearbox
rpm
P
mot
Motor power
kW
T
2
Required output torque of the driven machine
Nm
T
2
P
mot
9550
n
1
i
-----------------------------
P
mot
9550
n
2
-----------------------------
=
=
© Siemens AG 2017