The product of this series is a new one of hammer crusher series. Because it has no strip and the rotor can rotate in both directions, itIs named Keversible strp-tree Hammer Crusher. it overcomes the blocking problem caused by high humidity of materials, improvesthe utlization rate of hammer head, reduces the freguency of replacing hammer head, and ensures the uniformity of discharging grainsize. in metalurgy, building materials, chemical industry, hydropower and other industries, the product ofthis series is one of the mainequipment for crushing the small britle material with medium hardness, such as coking coal, small imestone, gypsum, alum, brick, tileetc. The materials to be crushed should not have the compressive strength of greater 150Mpa and the surface moisture of bigger than