... of coal, coke, cinter, moderately hard rock, ore, chalk, etc. Roller crusher is mainly used for the crushing of rocks of medium ... avoid the over-crush phenomenon and it has stable performance.Roller crusher technical specifcation:Model Feeding size(mm )Discharging size(mm )Capacityt ... 37 12250 2PG-900X500 ≤40 3--4020-50 44 14000 Roller crusher