LENZE
1
1-11
Small drives en 07/2010
General information
Dimensioning of geared motors and gearboxes
f
z
Transmission element
1.12
Gears
1.25 ... 1.4
Sprocket
1.5
Toothed belt pulleys
1.5 ... 2.0
Narrow V-belt pulleys depending on initial stress
2. Calculate the axial and radial forces applied to the gearbox shaft
[
[
Estimate the axial and radial forces applied
Approximate calculation of radial forces:
Requirement:
˘
F
rperm
≥ F
r
(F
rperm
taken from gearbox-specific data)
˘
F
aperm
≥ F
a
(F
aperm
taken from gearbox-specific data)
F
r
= 2000 ·
M
2
· f
z
d
w [mm]
Power, torque and speed
The power, torque and speed values specified in this catalo-
gue are rounded values and are valid under the following
conditions:
˘
Operating time/day = 8h (100% ED)
˘
Duty class I at 10 switching operations/h
˘
Mounting positions and designs in this catalogue
˘
Standard lubricant
˘
f
mains
= 50 Hz or 100 Hz constant
˘
T
U
= 20 °C
˘
Site altitude < = 1000 m above mean sea level
The rated power specified for motors and geared motors
applies to operating mode S1 in accordance with
VDE 0530 Part 1 / DIN 57530 Part 1.
If your operating conditions differ, the values that can be
obtained may deviate from those specified.
If you are operating under extreme conditions, please
contact your nearest Lenze representative.
Load capacity c of gearboxes
Parameter for the load capacity of Lenze gearboxes and
geared motors.
˘
c is the ratio of the permissible rated torque of the gear-
box to the rated torque supplied by the drive component
(e.g. the built-in Lenze motor).
˘
The value of c must always be greater than the value of
the application factor k calculated for the application.
Operating factor k (corresponding to DIN 3990)
Takes into account the influence of temporally variable
loads which are actually present during the anticipated
runtime of gearboxes and geared motors.
k is determined by
˘
the type of load
˘
the load intensity
˘
temporal factors