... reduction ratio,High efficiency,Reliable Performance,Easy Maintenance. Operating principle of ring hammer crusher:In the hammer mill machine, the ... motor drives the rotor rotate at a high speed through the belt, and on the rotor there ... gypsum, blocks, limestone, etc.Model NO.Diameter of rotor(mm)Working length of rotor(mm)Speed of rotor(r/min)Feedingsize(mm)Dischargingsize(mm ...