• Smooth running
Preconditions for smooth, vibration-free operation according to DIN 4024:
– Stable foundation design free of any shock or vibration
– Precise alignment of the driven machine
– A balanced output element corresponding to the motor balancing (coupling, belt pulley,
fan, ...)
Maintain the maximum permissible vibration amplitude levels in operation according to
ISO 10816-3.
Avoid inadmissible vibration levels caused by imbalance, for example (drive output element),
external vibration or any resonance over the complete speed range.
It may be necessary to completely balance the machine with the output element - or it may
be necessary to shift the system resonance point.
• Foot mounting/flange mounting
– When flanging the machine to a foundation or a machine flange, use the specified thread
size for the foot and flange mounting corresponding to EN 50347 or IEC 60072-1 or
IEC 60072-2.
– Mount the machine at four foot or flanged holes that are at right angles to one another.
The customer is responsible for selecting the strength (property class) of the mounting
elements.
Property class 8.8 or higher is recommended for the mounting elements.
– Select the correct screw length for IM B14 flanges.
– Ensure that the screw heads are in full contact with the flange surface. Use additional flat
washers (ISO 7093), especially for elongated foot mounting holes.
5.4.2
Flatness of the supporting surfaces for conventional motors
Shaft height
Flatness
mm
280 ... 315
0.20
355
0.20
5.4.3
Machine frame mounting feet (special design)
Please note that when the terminal box is mounted at the NDE (option H08), dimension C can
deviate from EN 50347.
Assembly
5.4 Aligning and fixing the machine
1LE5, 1PC4 shaft heights 280 ... 355
58
Operating Instructions, 11/2022, A5E41454666A
