Siemens LV Motors Manual - Rotor UK

Mounting, installation
5.1 Installation
5.1.3 Balancing
The rotors are balanced dynamically. The balancing quality corresponds to vibration severity
grade "A" for the complete machine as standard. The optional vibration severity grade "B" is
indicated on the rating plate.
The declaration regarding the type of featherkey for balancing is marked on the face of the
shaft end and on the rating plate.
Designation:
● As a standard measure, balancing is carried out dynamically with a half featherkey (code
"H") in accordance with ISO 8821.
● "F" means balancing with a whole featherkey (optional version).
● "N" means balancing without a featherkey (optional version).
The featherkey declaration on the shaft and transmission element must indicate the correct
type of balancing in each case and must be correctly mounted.
The balancing quality corresponds to vibration severity grade "A" for the complete machine;
vibration severity grade "B" is possible as an option, i.e. in order to ensure the desired
balancing quality, it must be ensured that the featherkey declarations on the hub and
machine shaft complement each other in the case of a shorter or longer transmission
element.
Note
The permissible vibration levels in line with the evaluation zones according to ISO 10816
determine whether mounting and balancing have been carried out correctly. If the coupled
machine does not comply with the vibration level according to EN 10816, complete dynamic
balancing or an alteration to the foundations may be necessary.
CAUTION
It is permissible to push on or pull off transmission elements only with suitable equipment.
The featherkeys are to be secured during transprot to prevent them falling out.
The generally required measures for touch protection of the transmission elements are to
be observed.
1LA5/6/7/9, 1LP7/9, 1PP6/7/9, 1MA6/7, 1MF6/7, 1MJ6, 1LE1
30 Operating Instructions, 10/2008, 5 610 00000 02 000