Abstract: A hammer for a hammermill includes an elongated pin hole and a pin-hole insert that allows the hammer to be mounted in a first position and a second position on a rotor of a hammermill to prolong the useful life of the hammer. The insert is installed in the pin hole using corresponding mating features. A hammer assembly and method for prolonging the life of hammers in a hammermill are also described.

Abstract: A hammer for a hammermill includes an elongated pin hole and a pin-hole insert that allows the hammer to be mounted in a first position and a second position on a rotor of a hammermill to prolong the useful life of the hammer. The insert is installed in the pin hole using corresponding mating features. A hammer assembly and method for prolonging the life of hammers in a hammermill are also described.

Abstract: A spider assembly for a rotary hammer assembly for a hammermill, the spider assembly including a spider having a number of arms, a replaceable end member mounted on the end of each arm and a protective cap mounted on the end of the replaceable member. The replaceable member including a contoured web that matingly engages a corrresponding socket in the spider arm. The web and socket including corresponding abutments for resisting the centrifigal force of the rotary motion of the hammer assembly. The protective cap is provided with a shroud having a contoured surface that matingly engages and protects the face of the end member.

Abstract: A hammer assembly for a hammermill of the type having a housing forming a fragmentizing chamber, a hammermill assembly being mounted for rotary motion in the chamber and including a drive shaft, a number of spider assemblies axially aligned on the shaft, each spider assembly including a number of arms having a pin opening at the outer end thereof, a number of discs alternately arranged on the shaft between the spider assemblies, each disc including a number of hammer pin openings corresponding to the number of openings in the spider arms to form axially aligned rows of openings, a hammer pin aligned at each row of openings and a number of hammers randomly mounted on the hammer pins in the spaces provided in the spider arms and between the adjacent discs.

Abstract: A protective end cap for a hammermill assembly including a drive shaft having a number of spider assemblies mounted thereon, each spider assembly including a hub having a number of spider arms with the spider arms being aligned with the spider arms on the adjacent spider arm assemblies, a hammer shaft extending through each row of spider arms, a number of hammers mounted on the hammer shaft in the spaces between the spider arms and a protective cap mounted on the exposed portions of the hammer shafts between the spider arms, the caps including flanges on one or both sides for protecting the outer ends of the spider arms.

Abstract: A heavy duty hammermill having a fragmentizing chamber and a hammer assembly mounted for rotary motion in the chamber and cooperating with a cutting comb and grate bars for fragmentizing auto parts fed into the chamber, the hammermill assembly being formed from a number of spiders mounted on a drive shaft and an end disc mounted on the shaft at each end of the spider assemblies, the spiders being spaced apart equal distances by spacer members provided between each pair of spiders and the end discs, each spider assembly including a spider having six arms with freely rotating hammers mounted on hammer pins in the spaces between the arms, the spider arms having a hub portion spaced outwardly from the spacer members and protective caps mounted on the impact areas of the spider arms and end discs.

Abstract: A replaceable, protective end cap assembly for the end of a spider arm for a rotary hammer assembly, the end cap assembly including a side plate assembly and a protective cap. The side plate assembly including a pair of side plates connected by upper and lower cross members that matingly engage the leading edge of the spider arm with the side plates covering the side wall surfaces in the impact area of the spider arm. The protective cap includes a shroud that overlies the front surface of the spider arm as well as the peripheral edges of the side plates and the side plate assembly and end caps being retained on the spider arms by the hammer shaft.