Coupling Type; Assembly Of The Coupling Half; Balancing Of Coupling; Assembly - ABB AMA Manual

3.3.3 Coupling type

3.3.4 Assembly of the coupling half

3.3.4.1 Balancing of coupling

3.3.4.2 Assembly

3BFP 000 063 R0101 REV D
NOTE: In order to avoid bearing damages, the transport locking device must be fitted to the
machine whenever the machine is moved, transported to another location or stored. See
Chapter 2.1 Protective measures prior to transport.
Machines with rolling bearings must be connected to the driven machine with flexible
couplings, e.g. pin couplings, or gear couplings.
If the axially locked bearing is at the N-end (see dimension drawing), make sure that a
continuous free axial movement is possible between the coupling halves in order to permit
thermal expansion of the machine shaft without damaging the bearings. The expected axial
thermal expansion of the rotor can be calculated as defined in the Chapter 3.6.4 Correction for
thermal expansion.
Vertical machines may be designed to carry some load from the shaft of the driven machine. If
this is the case, the coupling halves have to be locked against slipping in the axial direction by a
lock plate on the end of the shaft.
NOTE: The machine is not suitable for belt, chain or gear connection unless it is specifically
designed for such use. The same applies for high axial thrust applications.
The rotor is dynamically balanced with half key as standard. The way of balancing is stamped to
the shaft end:
• H = half-key and
• F = full key
The coupling half must be balanced respectively.
The following instructions must be taken into account when assembling the coupling half.
• Follow the general instructions of the coupling supplier
• The weight of the coupling half can be considerable. A suitable lifting gear may be needed
• Clean the shaft extension of its anti-corrosive coating, and check the measurements of the
extension and the coupling against the provided drawings. Ensure also that the keyways in
the coupling and the shaft extension are clean and free from burrs
• Coat the shaft extension and hub bore with a thin layer of oil as to facilitate the mounting
of the coupling half. Never coat mating surfaces with molybdenum disulphide (Molykote)
or similar products
• The coupling must be covered with a touch guard.
NOTE: In order not to damage the bearings, no additional forces should be applied to the
bearings when assembling the coupling half.
Manual for High Voltage Process Performance Motors
Installation and Alignment - 17