Sturtevant’s Sample Grinder is capable of very fine work, producing products as fine as 100 mesh. Sturtevant Sample Grinders are constructed from heavy-duty cast iron. A disc mill with “Open Door” construction, capable of very fine work, producing products as fine as 100 mesh (coarser if desired). Capacities available from 50 lbs. to 800 lbs. per hour. Spring loaded grinding discs assure uniform product sizes in applications such as chemicals, ceramics, minerals and glass.