DS TECH US_CAD Motox Catalogue 2011_1

1275 Newton, local 15
Boucherville, Qc,
Canada, J4B 5H2
(450) 655-7447
info@pt-dstech.com
www.dstech.ca
Drive selection
MOTOX Gear Motors
Operating conditions decide the selection of drive. These conditions are taken into account by service factor (SF).
For normal operating conditions with uniform loadings, low masses to be accelerated and few starts, this service factor (SF) = 1.
For different operating conditions see table “Service factor”. This factor decides the speed reducer size, not, however, the drive motor
rating.
With known motor rating and output speed enter the selection tables list and choose a speed reducer type, whose permissible service
factor SF o ≤ SF (please see next page).
Siemens personnel are available to advise on drive selection for special operating conditions, e.g. reversing, short time or intermittent
operation, abnormal temperature, counter-current braking, high or rotating radial forces onto the output shaft etc. upon request.
For that purpose we require the following data:
1. Type of driven machine
2. Daily operating period
3. Required power [hp] or torque [lb.in.]
4. Nominal speed of gear unit [r.p.m.] or ratio i
5. Voltage [V] and frequency [Hz]
6. Starting (direct on line or star/delta)
7. Type of operation, starting cycles frequency, frequency inverter operation
8. Moments of inertia J ext [lb.in. 2 ] of driven machine referred to nominal output speed of gear unit
9. Connection to input or output shaft (direct, coupling, belt drive, chain drive, gears)
10. Overhung loads F R [lb] on shafts and their direction with distance of load application point from shaft shoulder, thrust forces F A [N]
11. Ambient temperature [°F]
12. Mounting position
13. Desired braking torque [lb.in.]
If motors must conform to foreign standards, these standards should be specified exactly.
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