The GMJ type drum ball mill is an ultra-fine ball milling equipment for laboratories and small-scale production. It is powered by an electric motor with synchronous belt drive, features polyurethane roller, manual wheel adjustment for roller spacing, and mobile casters. It boasts a full range of specifications, advanced structure, aesthetic design, easy operation, high work efficiency, long service life, and uniform particle size grinding. It is the preferred equipment for scientific research, teaching, testing, and production. The variable frequency drive model of the drum ball mill includes functions such as timed shutdown, frequency adjustment, and digital display of the drum speed.