Beckhoff AM8000 Series, Operation Instructions Manual

Page: 89 / 123

Mechanical installation
Version: 4.3 ─── 89 AM8000 and AM8500
8.2.1
Bearing load during instal-
lation
Avoid mechanically overdetermined support of the motor shaft
through rigid coupling and additional external support.
1
2
F
A
F
R
x
When assembling output elements, care must be taken to minimize
the load on the shafts and bearing due to shear forces such as ra-
dial force F
R
and axial force F
A
. Axial loads shorten the service life
and can lead to malfunctions of the holding brake [+].
Special features when using toothed belt drives:
When using a toothed belt drive, the radial and axial loads on the
shaft must not be exceeded. Excessive load can lead to fatigue frac-
ture of the motor shaft. Be sure to read the chapter Technical data.
Storage
The servomotors are equipped with sealed grooved ball bearings.
The fixed bearing is located on the B-side of the servomotor and the
floating bearing on the A-side; shaft output side of the servomotor.
Oscillatory bearing movements < 180° shaft rotation are not permis-
sible. Use the Beckhoff load/force calculator for a detailed calcula-
tion of the bearing forces on the motor shaft.
Servomotor A-bearing sizes B-bearing sizes
AM801x 609 609
AM802x 6001 609
AM8x3x 6203 6201
AM8x4x 6204 6203
AM8x5x 6205 6203
AM8x6x 6307 6305
AM807x 6309 6307