1FT6 Synchronous Motors
Configuration Manual (PFT6), 10.2005 Edition, 6SN1197-0AD02-0BP1
5-1
Planetary Gearbox 5
5.1 Selecting/dimension gearboxes and important quantities
5.1.1 Overview
• If the gearbox oil is in contact with the motor flange, then a minimum IP67 degree of pro-
tection must be selected.
• Technical data should be taken from the Catalogs of the gearbox manufacturers.
• The following influencing parameters should be taken into consideration:
- Accelerating torque, continuous torque, number of cycles, cycle type, permissible input
speed, mounting position, torsional play, torsional stiffness, radial and axial forces.
- Worm gearboxes are only conditionally suitable for reversing operation for servo appli-
cations
5.1.2 Dimensioning for S3 duty for natural cooling
When dimensioning, you can use the motor characteristic without reduction. Please note the
permissible maximum torque and the permissible gearbox input speed.
M
mot
= M
out
/ (i • η
G
)
The motor and gearbox are assigned as follows:
M
max
,
gear
= M
0 (100K)
• i • f
M
max, gear
Max. permissible torque output
M
0 (100K)
Motor stall torque
I Gear ratio
f Supplementary factor
f = f
1
• f
2
f
1
= 2 for motor accelerating torque
f
2
= 1 for = 1000 gearbox switching cycles
f
2
> 1 for > 1000 switching cycles (refer to the Gearbox Catalog)
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