• When positioning the motor, ensure that a uniform axial gap is maintained around the
coupling.
• Smooth running
Preconditions for smooth, vibration-free operation:
– Stable foundation design free of any shock or vibration.
– A precisely aligned coupling.
– A well-balanced drive output element (coupling, belt pulleys, fans, ...)
Maintain the maximum permissible vibration values in operation according to ISO 10816-3.
Avoid inadmissible vibration 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 drive output element or the
system resonance frequency must be shifted.
• Foot mounting/ange mounting
– Use the specied thread size laid down in EN 50347 when anging the machine to a
foundation or a machine ange.
– Mount the machine at all the foot or anged holes provided. The choice of xing elements
depends on the foundation and is the plant operator's responsibility. Comply with the
required property classes for screwed connections and materials for xing elements.
– Select the correct screw length for IM B14 anges.
– Ensure that the screw heads are in full contact with the ange surface. Use additional at
washers (ISO7093), especially for elongated foot mounting holes.
5.4.3 Flatness of the supporting surfaces for conventional motors
Shaft height Flatness
[mm]
≤ 132 0.10
160 0.15
≥ 180 0.20
5.4.4 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.
To comply with dimension C according to EN 50347, for machines with double or triple holes at
the NDE, use the appropriate screw bore.
Assembly
5.4Alignment and fastening
1MB..1/2/3/4 - shaft heights 63 ... 355
70 Operating Instructions, 11/2023, A5E52779900A
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