Abstract: The disclosure relates to an improved rotating impeller table for a secondary impact crusher comprising a side discharge port containing housing incorporating dove tailed abrasion resistant wear elements disposed on the external cylindrical wall thereof. The dovetailed wear elements overlap and are supported by removable lower edge wear liners which also protect the outer edge area of the lower part of the housing. A removable top liner retains the dove tailed elements in position and protects the upper part of the housing from abrasion. A removable and repositionable wear ring fits within an annular opening in the top of the housing and may be repositioned at least three times to essentially triple its wear life. Upper and lower centrufugally locking flat and ramped liners are disposed within the housing on its upper and lower ends.

Abstract: The disclosure describes a secondary impact crusher for earth material aggregate. A cylindrical housing contains a novel rotatable impeller assembly comprising an impeller table, impeller plates attached to the table and impeller brackets for holding impeller shoes. The novel shoes and plates provide protection from damage to the brackets and fine grained aggregate. The impeller assembly is lubricated and cooled by a unique partially gravity-fed lubrication, cleansing and cooling system.