The MJ-BD bar pin sand grinder series from Dongguan Mojiang Equipment Co., Ltd. is a cost-effective and efficient grinding equipment. This sand grinder adopts dual end mechanical seals, variable frequency drive, silicon carbide ceramic grinding chamber material, and does not block the large flow dynamic centrifugal discharge system. It can be selected with corresponding chamber materials for different oily and water-based slurries. The corresponding mechanical seal material is suitable for grinding slurries such as paint with a diameter of 10 microns to 0.6 microns, with high efficiency and good particle size distribution effect.