Attachment Of Drive Elements - Bosch MSM019A Datasheet

12/61 Bosch Rexroth AG
Operating conditions
3.9

Attachment of drive elements

Gearbox mounting on motors
Over-determined bearing
Couplings
Bevel pinion or helical drive pin‐
Please observe the following notes during assembly of drive element onto the
output shaft.
If transmissions are attached to motors, the thermal coupling of the motors to
the machine or system design changes.
Depending on the type of transmission, the amount of heat generated at the
transmission varies. In any case, the heat dissipation of the motor via the
flange is reduced when the transmission is attached. This must be taken into
account when planning the system.
In order not to thermally overload motors when using transmissions, it is nec‐
essary to reduce the specified performance data.
Fig. 3-4: S1 characteristic curve gearboxes
The torques specified in the motor characteristics must be re‐
duced by approx. 10-20% when attaching transmissions.
Observe all other notes and requirements in the documentation for the trans‐
missions used.
When assemble drive elements, avoid an over-determined bearing, because
the indispensable existing tolerances lead to additional forces on the bearing
of the motor shaft and, if necessary, to a significantly reduced bearing life.
If an over-determined arrangement cannot be avoided, please
contact Bosch Rexroth.
The machine construction and the drive elements used must be carefully
adapted to the motor type so as to make sure that the load limits of the shaft
and the bearing are not exceeded.
When mounting extremely rigid couplings, an unacceptably high
load on the shaft and bearing can occur due to a radial force
which constantly changes the angular position.
Due to thermal effects, the flange end of the output shaft can shift by up to
ions
0.6 mm in relation to the motor housing. When using helical drive pinions or
bevel gear pinions mounted directly on the output shaft, this change in length
leads to
DOK-MOTOR*-MSM********-DA05-EN-P
Synchronous Servomotors MSM