FLENDER COUPLINGS N-EUPEX 3103en, Руководство по сборке и эксплуатации

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7.2.2.2 Possible causes
Unsuitable coupling
• Important information on the description of the drive unit and the environment were not
available when the coupling was chosen.
• System torque too high and/or torque dynamics not permissible.
• System speed too high.
• Application factor not selected correctly.
• Chemically aggressive environment not taken into consideration.
• Coupling not suitable for the ambient temperature.
• Diameter and/or assigned fit of the finished bore not permissible.
• Width across corners of the parallel keyways greater than the width across corners of the
parallel keyways in accordance with DIN 6885/1 for the maximum permissible bore.
• Shaft-hub connection incorrectly sized.
• Maximum permissible load conditions not taken into consideration.
• Maximum permissible overload conditions not taken into consideration.
• Dynamic load conditions not taken into consideration.
• Coupling and the machine and/or drive train form a critical torsional, axial or bending
vibration system.
Assembly-related causes
• Damaged parts installed.
• Shaft diameter outside the stipulated tolerance range.
• Coupling parts interchanged and hence not assigned to the specified shaft.
• Stipulated locking elements to prevent axial movements not installed.
• Stipulated tightening torques not adhered to.
• Bolts inserted dry or greased.
• Flange surfaces of screwed connections not cleaned.
• Alignment and/or shaft misalignment values not set in accordance with the instructions.
• Coupled machines were not correctly connected to the foundation so that a shifting of the
machines leads to an impermissible displacement of the coupling parts.
• Coupled machines not earthed adequately.
• Coupling guard used is not suitable.
Operation
7.2 Faults - causes and rectification
Assembly and operating instructions 3103en
38
Edition 10/2020