18
Measuring the gear unit’s surface temperature
•
The gear unit’s maximum surface temperature depends on the motor speed, gear ratio and
motor execution and must never exceed 130 °C (160 °C if so specified on the nameplate).
•
The nameplate specifications regarding the maximum surface temperature, refer to measure
-
ments made in normal ambient and installation conditions. Even minimal variations to said
conditions (e.g. smaller mounting cabinet) could have a significant impact on the build up of
heat.
•
When commissioning the gear unit, the surface temperature must be measured in the same
operating conditions as for the final application.
The surface temperature must be measured at the coupling between the gear unit and motor,
and at the points which are most shielded from the motor’s fan cooling.
(S2)
IMPORTANT:
The maximum surface temperature is reached after 3 hours’ operation at full load. The
temperature measured in these conditions must not differ (DT) from the ambient tempe
-
rature by more than the following values:
Should the temperature differential exceed these values, stop the gear unit at once and
contact the BONFIGLIOLI RIDUTTORI technical service.
•
If the temperature differential is within the above values, wait for the gear unit to cool down and
then install the temperature indicator supplied with the gear unit at the point of maximum tem
-
perature.
Example:
•
At the same time, check for excessive running noise and vibration.
DT [°C]
C 11...C 61 75
A 10...A 60 75
F 10...F 60 75
VF 44, VF 49 75
W 63...W 86 75
W 110 90
(A3)
2
6
6
°
F
1
3
0
°
C
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