English to Dutch Tech/Engineering Electronics / Elect Eng elektromotoren

Motors are balanced by the manufacturer according to the vibration thresholds established in the IEC60034-14, NEMA MG1 - Parte 7 and NBR 11390 standards (except when the purchase agreement specifically provides different thresholds).
Vibrations are measured vertically, horizontally and axially at the end and front bearings.
When a client sends the half coupling to WEG, the motor is balanced with the half coupling attached to the shaft.
If not, according to the aforementioned standards, the motor is balanced using a half-key (that is, a bar of same width, length and height is used to fill the key groove during balancing).

en key-groove