Specifications

Asynchronous Motors Ver. 0002 AM - 27
AM.10.3 COUPLING THROUGH GEAR BOXES
Refer to the "direct coupling" section and to any information provided by the manufacturer of
the gear boxes.
AM.10.4 BALANCING
The rotor is dynamically balanced with the key inserted in the keyway. It is an "S" degree
balancing and, upon request, an "SR" degree can be obtained. It is important that the pulley,
half-joint or rack be dynamically balanced (without the key) before inserting them in the
transmission shaft. Any vibration while the motor is running indicates an unbalanced gear box
and must be corrected.
AM.10.5 MOUNTING THE GEAR BOXES
Upon request, the motor may carry a special flange for mounting gear boxes.
The joints, pulleys, pinions, etc. must always be adjusted very accurately and with the right
tools. Never use a hammer since it can damage the bearings and accessories, especially
those of the feedback device.
Before manipulating the gear box, remove the anti-rust paint from the motor shaft by using
alcohol or the proper solvent (the solvent must not get into the bearings). Do not use
sandpaper or any other abrasive element to remove the paint.
Lubricate the end of the shaft and the keyway before inserting the transmission and assemble
it by following the manufacturer's instructions.
AM.11 RADIAL AND AXIAL LOADS
A poor alignment between the motor and the machine increases the vibrations on the shaft
and reduces the life-span of the bearings and couplings.
In order to avoid these problems, follow these advises::
· Use flexible couplings when the coupling is direct.
· Avoid radial and axial loads onto the motor shaft, making sure that they do not exceed
the values indicated in the table at the beginning of the chapter.
Note: For combined axial and radial loads, decrease the value of the allowed radial force to
70%.
When installing pulleys or gears for transmission, avoid hitting the shaft.
Use some tool supported in the threaded
hole of the shaft to insert the pulley or the
gear.