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Description
3.3 Installation
Surface cooling by relative movement of cooling air: Cooling method IC 418 according to
EN / IEC 60034-6
IC418 IC4A1A8
Figure 3-2
3.3.2
Bearings
To support the machine shaft and maintain its position in the non-moving part of the machine,
DE and NDE rolling bearings are used. One end performs the function of a locating bearing that
transfers axial and radial forces from the rotating machine shaft to the non-moving part of the
machine. The opposite end is implemented as a floating and support bearing to allow thermal
expansion inside the machine and transfer radial forces.
The nominal (theoretical) service life of the bearings according to ISO 281 is at least 20,000
hours when the permissible radial/axial forces are complied with, and the machine is operated
on 50 Hz line supplies. 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.
The machine is equipped with grease-lubricated rolling bearings.
• In the standard version, the bearings of machines up to shaft height 250 are permanently
lubricated.
• The bearings of machines from shaft height 280 and above are equipped with a relubrication
system.
3.3.3
Balancing
As standard, the machine is designed with vibration severity level A. The rotor is dynamically
balanced with a half feather key (code "H").
Vibration severity level B can be ordered as option, and stamped on the rating plate.
See also
Mounting the drive output elements (Page 60)
3.3.4
Types of construction/method of installation
The type of construction of the machine is stated on the rating plate.
26
IC418
1LE1, 1FP1/3, 1PC1/3 shaft height 63 ... 315
Operating Instructions, 11/2023, A5E38483075A
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