Crushing chambers arc matched to each individual application, optimizing crushing performance Manganese wearing parts arc standard - chrome alloy option is available fbr concaves and bottomshcll liners Effective dust seal is equipped with an over pressure air blower to keep dust out of the eccentric and drive, increasing crusher bearing life Counterbalanced design, ideal fbr all applications, mobile or stationary, minimizes forces transmitted to the supporting structure The spider bushing and seal can be replaced without removing the spider - reducing manpower, time, equipment and lost production due to down-time