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Maintenance And Operation Knowledge About Hammer Mill

2010-12-10
Granulators, or ring hammer mill, are composed of a shaft/hammer/disc assembly rotating at medium speed (300-720 rpm depending on diameter) within a breaker cage. Before your granulator was fully assembled, the folks in our factory balanced the rotor assembly on a static balance stand. But after extended service, the effects of wear on these things can cause problems such as vibration, hot bearings and unusual wear.
If Hammers are allowed to wear beyond their point of normal replacement, they can break and cause a serious vibration. Be sure to check the condition of all wear parts regularly, especially the rotating parts.
Another condition that can cause vibration is improper feeding. The best way to feed a granulator is to slide the material into the crusher along the breaker plate, and to avoid dropping material directly on the rotor. When the crusher mill is fed properly, wear will be uniform, resulting in longer hammer and disc life.  We can advise you on ways to feed your crusher properly so that parts wear and maintenance down time are kept to a minimum.
Also take measurements of bearing temperatures. A hot-running bearing will go out of tolerance and eventually fail; this is most often caused either by deterioration of the grease or by using too much grease. Check your operation manual, or give us a call for advice.
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