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Application notes
9.2
Environmental conditions
9.2.1
General information
9.2.2
Mechanical environmental conditions
Vibration/sinusoidal vibrations
Shock/impacts
9.2.3
Climatic environmental conditions
Humidity/temperature
Bosch Rexroth AG R911298798_Edition 08
According to DIN EN 60721-3-3, MBT motors in stationary and weather-pro‐
tected applications may be operated under the following mechanical and cli‐
matic environmental conditions.
Direction
Axial
Radial
Tab. 9-1:
Maximum values for sinusoidal vibrations
Motor frame size
130 ... 531
Tab. 9-2:
Maximum values for shock load
●
Ensure that the maximum values specified above for vibra‐
tions and impacts are not exceeded during storage, trans‐
port, and operation of the motors.
●
The design and effectiveness of shock-absorbing or shock-
decoupling accessories depend on the particular application
and have to be determined by measurement. This is not lie
in the responsibility of the motor manufacturer.
Modifications of the motor design result in loss of the war‐
ranty.
Climatic environmental conditions are defined according to different classes
as specified in DIN EN 60721-3-3, Table 1. They are based on long-term ex‐
periences and take all influencing variables into account, e.g., air temperature
and air humidity.
On the basis of this table, Rexroth recommends Class 3K4 for permanent
use of the motors.
The following table provides extracts of this class.
Environmental influences
Low air temperature
High air temperature
Low rel. air humidity
High rel. air humidity
Low absolute air humidity
High absolute air humidity
MBT High Synchronous Torque Motors
Maximum allowed load due to vibrations (10-2000 Hz)
10 m/s²
30 m/s²
Maximum allowed shock load (6 ms)
Axial
100 m/s²
Unit
°C
°C
%
%
g/m³
g/m³
Radial
100 m/s²
Class 3K4
+5
)
1
+40
5
95
1
29
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