Four sizes available. Essa JC1000 Jaw Crusher a low-cost, versatile crusher designed for crushing smaller samples up to 85 mm across a wide range of industries. Essa JC2000 Jaw Crusher a workhorse engineered to be the industry standard crusher in the geochemistry laboratory. Essa JC3000 Jaw Crusher a heavy-duty primary jaw ... Jaw crusher is a kind of stone crusher machine which is widely used as primary or secondary crusher in stone crushing plant. The purpose is to reduce hard stone material to a small size that it can be transported by conveyors to the next crushing stages. 1200mm Feed Size. 5.5-280KW Motor Power.