Metal objects are mixed into the grinding chamber of the main engine of ultrafine vertical millSince the central axis of the main machine rotates very fast and the metal objects are very hard, after being shoveled up by the shovel, they will collide everywhere in the main machine's grinding chamber, causing the main machine to vibrate, and the metal objects need to be cleaned.It should be noted that the metal objects may be brought in from the raw materials, or the internal parts of the ultrafine vertical mill may fall off and fall in, such as screws or bearing balls.The couplings of the main engine and the reducer are differentThe direct power of the main engine and the reducer is transmitted through the coupling. After the machine is turned on, the main machine and the reducer will produce vibration and noise because the two couplings have different shafts. Therefore, the coupling must be calibrated before starting the machine.