User Manual 08/2003 Edition

2
2 Installing and Connecting–up 02.99 05.03
2.5 Gearbox selection
2.5 Gearbox selection
2.5.1 Gearboxes for SIMODRIVE POSMO A –75 W
Modular gearbox,
75 W motor
2-52
For SIMODRIVE POSMO A – 75 W, the following gearboxes can be
selected and used according to Table 2-4:
Table 2-4 System data, modular gearbox with planetary/worm gearboxes
Gearbox Stage StepEffi- Torque Rated
type num- number
down
ratio
ciency
Permissible
speed
1) ber ratio
Available
speed
S1 short S1 S3 n
term
25 %
1 min
(S1)
iGearbox Gearbox [Nm] [Nm] [Nm] [Nm] [RPM]
Without
gearbox
Planetary
gearbox
– – – – – 0.18 0.36 3300
1
4.5 0.85 1.2 2.4 0.7 1.4 733
8 0.85 1.2 2.4 1.2 2.4 413
20.25 0.72 8 16 2.6 5.2 163
2 36 0.72 8 16 4.7 9.3 92
50 0.72 8 16 6.5 13.0 66
3
126.5625 0.61 24 48 13.9 27.8 26
162 0.61 24 48 17.8 35.6 20
5 0.70 2 4 0.6 1.3 660
Worm
gear2)3) gear
1 24 0.50 3.5 7 2.2 4.3 138
2)3) 1
75 0.25 4 8 3.4 6.8 44
1) The specified permissible gearbox torque may not be exceeded.
Gearboxes can be briefly loaded (1 – 2 s when starting) with higher torques up to a maximum of twice the
continuous torque without causing permanent damage (but this does have a negative impact on the
gearbox lifetime). The gearbox could be destroyed if this limit is exceeded.
The current limits of the positioning motor are preset in the factory so that gearboxes cannot be destroyed
due to being over–stressed.
2) Notice: If the worm gear has to be rotated due to the mechanical design, then the mounting screws must
be subsequently tightened to a torque of 2 Nm and secured using Loctite 274. No warranty is accepted
for damage caused by incorrect changes.
3) Torsional play < 1°
Reader’s note
Additional gearbox data ––> refer to Chapter 2.6.1
Dimension drawings of motors
and gearboxes ––> refer to Chapter C.1
Gearbox-dependent parameters ––> refer to Chapter 5.6.3
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition