Jaw Crusher for Sale

The jaw crusher compresses the rock between a fixed jaw and a moving jaw to create breakage. The return motion of the moving or 'swinging' jaw permits feed to enter the crushing cavity and sufficiently broken material to discharge by gravity. The maximum dimensions of the feed opening, universally employed to designate the crusher, are termed the 'gape' and the product size is largely determined by the width of the discharge aperture when the moving jaw has retreated fully--the 'open side setting'. The reduction ratio possible is usually in the range 4:1 to 6: 1. The moving jaw may be actuated by one of two principal mechanisms: single toggle and double toggle. In the 'double toggle' machine the rotation of an eccentric shaft causes a vertical reciprocating motion of a component called a pitman that is translated by two toggles into swinging action of the moving jaw which is pivoted at its upper edge. The resultant action creates very powerful compressive forces by leverage in the upper zone of the crushing chamber and the almost total absence of abrasive motion (relative vertical motion between jaw plates). Therefore, this machine is most applicable to the crushing of very strong, abrasive rocks but is more complex, heavy and expensive than a single toggle crusher. In the single toggle machine the moving jaw is actuated by an eccentric shaft which also acts as the pivot along the upper edge of the jaw. The resultant action includes relative vertical motion between the jaw plates which produces the advantage of greater throughput for less abrasive rocks.

In both cases the jaws are protected by replaceable alloy (manganese steel) liner plates which may be smooth or corrugated to reduce the production of slab shaped particles. The jaw crusher is suitable for all hard rocks generally used for aggregate.