Patent ID: 7438097

Claim:
A rotor assembly for use in a comminuting machine for wood and the like, comprising; a shaft arranged for driven rotation about an axis; a plurality of rotors carried by the shaft in generally adjacent relation to one another for conjoint rotation with the shaft; a plurality of hammer heads carried by the rotors and extending radially outwardly from the shaft; and a plurality of hammer inserts releasably attached to respective ones of the hammer heads, each insert including an insert body and a welded-on abrasive wear material coating over at least a first cutting edge portion of the insert body of each hammer insert insert body, the first cutting edge of each insert body being defined by a front facet generally facing the direction of assembly rotation, a radially outer end facet adjacent the front facet, and an intervening radially distal corner of the hammer insert formed at the intersection of the front and end facets, the front facet being disposed at a relative included angle of greater than 60 degrees to the end facet.