Lab jar mill is a kind of equipment used for ultra-fine grinding and mixing for laboratory and small batch production, which is also called rolling mill with more than two working positions. The machine is preferred equipment for scientific research, education, experiment and production due to its advantage such as elegant and fashion design, compact structure, easy operation, high efficiency, and uniform granularity. It is widely applied to industries of electronic materials, magnetic materials, biological medicine, ceramic glaze, mental powder, nonmetallic minerals, new materials and etc. Optimal design of rotating speed is adopted in the machine. Mill jar is dragged to rotate by rubber roller and balls inside the jar make incline flow movement and disperse materials. Thus it obtains best effects of grinding. As a result, materials are ground to micro powder. Timing control panel is adopted in the machine with controlling functions of pausing and cumulative timing, so that you may set working time according to requirement at any time. It not only saves time and labor, but is easy for operation.