SIEMENS
2/8
Siemens MD 50.8 · 2017
Configuring guide
Configuring a gearbox
2
■
Shaft load and bearing service life
Available radial force
The total available radial force comprises the force due to weight
on the running wheel and the tangential force exerted by the
torque. The weight distribution depends on the relevant trolley
type and on the number of drives and running wheels. Forces
are also exerted as a result of weight transfer during startup,
braking and ascending travel. These forces must be taken into
account in the available radial force calculation.
Your Siemens contact person will be pleased to provide config-
uring advice. In order to dimension the drive, we will need the
completed
checklist on page 2/2
.
Variables for defining shaft load and bearing service life
Trolley type 1
Fig. 2/2
Trolley type 1: 1 running wheel, one wheel is driven
Trolley type 2
Fig. 2/3
Trolley type 2: 2 running wheels, one wheel at the front or rear is driven
Trolley type 3
Fig. 2/4
Trolley type 3: 4 running wheels, 2 wheels are driven
Code
Description
Unit
H
Vertical distance between running axis and
center of gravity
mm
L1
Distance between running wheels
mm
L2
Horizontal distance between running wheel
and center of gravity
mm
L3
Distance between swivel joints
mm
S
Center of gravity
mm
G_D087_XX_00299
S
H
G_D087_XX_00300
L2
H
L1
S
G_D087_XX_00301
L2
H
L3
L1
S
© Siemens AG 2017