Technical data

additional forces acting on the bearing of the motor shaft and, should the oc-
casion arise, to a distinctly reduced service life of the bearing.
If redundant attachment cannot be avoided, it is absolutely neces-
sary to consult with Bosch Rexroth.
The machine construction and the drive elements used must be carefully adap-
ted to the motor type so that the loading limits of the shaft and the bearing are
not exceeded.
When connecting extremely stiff couplings, the radial force which
constantly changes the angular position may cause an impermis-
sibly high load on the shaft and bearing.
Owing to thermal effects, the flange-sided end of the output shaft may shift by
0.6 mm in relation to the motor housing. If skew bevel driving pinions or bevel
gear pinions directly attached to the output shaft are used, this change in po-
sition will lead to
● a shift in the position of the axis if the driving pinions are not defined axially
on the machine side,
● a thermally dependent component of the axial force if the driving pinions
are defined axially on the machine side. This causes the risk of exceeding
the maximum permissible axial force or of the play within the gears in-
creasing to an impermissible degree.
In such cases, drive elements should be preferably used with their
own bearings which are connected to the motor drive shaft via ax-
ially compensating couplings.
9.9 Holding Brakes
9.9.1 General
The holding brakes of the IndraDyn S motors works according to the
principle „electrically-released“ . Non-operative closed holding brakes open
when applying the operating voltage.
The electrically-released holding brake is used to hold the axes at a standstill
and when the ”controller enable” signal is off. When the power supply voltage
loss and the controller is enabled, the electrically-released brake will automat-
ically shutdown.
Do not use the holding brake as an operational brake for moving
axles.
If the holding brake is engaged repeatedly on a drive in motion or the rated
brake torque is exceeded, premature brake wear can occur.
Observe the safety requirements during the system design.
Couplings
Ball bearing pinion or helical teeth
drive pinion
Project Planning Manual | Rexroth IndraDyn S Electric Drives
and Controls
| Bosch Rexroth AG 167/194
Operating Conditions and Application Notes