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Description
3.3 Installation
3.3.2.2
Machines without a fan
Surface cooling by free convection: Cooling method IC 410 according to EN / IEC 60034-6
Figure 3-1
3.3.3
Bearings
In order to support the machine shaft and maintain its position in the non-moving part of the
machine, only 2 rolling bearings are used. One rolling bearing performs the function of a
location bearing that transfers axial and radial forces from the rotating machine shaft to the non-
moving part of the machine. The second rolling bearing is implemented as floating and support
bearing in order to allow thermal expansion inside the machine and transfer radial forces.
The nominal (calculated) useful life of the bearings according to ISO 281 is at least 20,000
hours with utilization of the permissible radial/axial forces. However, the achievable useful life
of the bearings can be significantly longer in the case of lower forces (e.g. operation with self-
aligning couplings).
Rolling bearings with permanent lubrication are maintenance-free.
22
IC410
1PC134, 1PC136 crane motors SH 132 ... 315
Operating Instructions, 02/2019, A5E43212221A
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