Working Principle of laboratory ball mill When the laboratory ball mill works, motor and speed reducer transmit torque force to big and small gears of laboratory ball mill, so the barrel rotates.When the barrel rotates, Steel balls or other grinding media in the barrel are lifted to a certain height and fall down freely, so materials in the barrel are impacted. Grinding media mixing with materials impact and grind materials continuously. The grinding media and materials impact and grind each other when the laboratory ball mill rotates continuously. The final product will be discharged from outlet when it meets the request, so the grinding process is finished application range, simple structure and convenient maintenance.