The Laboratory Pulveriser is a disc type grinder designed for grinding virtually any mateial to produce a fine mesh sample in one operation. The pulveriser is adopted for use in assay offices, metallurgical, aggregate, quarry, chemical and industrial laboratories. It is a self contained grinder furnished with rotating disc having a planetary movement in verticle plane. This feature gives added life to the waring parts and delivers a product of uniform fineness. The pulveriser will reduce a 1 pound sample of quartz type material to 100 mesh or above in 1 minute. Maximum feed size 6 mm.