China 50tph PE400X600 Jaw Crusher for Rock/ Limestone ... It is mainly used to crush rock and ore, whose compression strength is less than 320 Mpa. Jaw crusher, your preferred primary crusher, is used for coarse crushing and fine crushing. stone crusher/ rock crusher/ Jaw Crusher Features. 1. Crushes the ores,rocks,pressure below 320 MP; 2. Easy maintenance; 3. Used in mining,building,chemical; 4.