Further information
Further information about the shrink disk can be found in the shrink disk operating instructions.
These are included in the complete documentation for the gear unit.
3.12 Heating
Introduction
At low ambient temperatures it may be necessary to preheat the gear unit oil before switching
on the drive or while it is in operation.
Heating elements
Heating elements can be used for these applications, for example. Heating elements convert
electricity into heat and transfer this to the oil in which they are immersed. The heating elements
are installed in protective tubes in the housing so that they can be replaced without draining o
the oil rst.
Complete immersion of the heating elements in the oil bath must be ensured by adhering to the
installation position in accordance with the dimension drawings in the complete
documentation and the oil level.
WARNING
Fire hazard
Exposed heating elements pose a re hazard.
Do not switch on the heating elements unless you have checked that they are completely
immersed in the oil bath.
If heating elements are retrotted, the heat output at the outer surface of the heating element
must not exceed the maximum values stated in the table below.
The following table contains information about the specic heat output P
HO
as a function of
ambient temperature:
Table 3-2 Information about the specic heat output
P
HO
in W/cm
2
Ambient temperature in °C
0.9 10 to 0
0.8 0 to -25
0.7 -25 to -50
Since it is vital to ensure that the heating elements are fully immersed in the oil bath, the higher
oil level required by rotary shaft sealing rings makes it essential that these seals are always used
for applications with heating elements. It is not possible to use Tacolab seals.
The diagram below shows a heating system on a type B3.. gear unit:
Description
3.12 Heating
Assembly and operating instructions A5051en
Edition 06/2020 37
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