Swinging hammer for a material reducing machine

A tub grinder comprising:

• a tub having walls defining an interior and a floor having an opening;
• a grinding mill disposed at least partially exposed through said opening, said grinding mill including;
• a shaft mounted for rotation about a main axis;
• a plurality of hammers secured to said shaft for rotation therewith, each of said hammers including a body member having a first end and a second end, said first end connected to said shaft at a pivot axis parallel to and spaced from said main axis and said second end having an impact pin set with a longitudinal axis of said pin at an oblique angle with respect to the body member of the hammer, said pin including an impact end facing a direction of rotation of said shaft about said main axis.

A tub grinder comprising:

• a tub having walls that define an interior volume and having a floor defining an opening;
• an upwardly curved screen positioned below the opening in the floor of the tub;
• a hammermill extending across at least a portion of the opening in the floor of the tub, the hammermill including a shaft rotatable about a main axis passing longitudinally through the shaft, the hammermill also including a plurality of hammers which are swung by the shaft, at least one of the hammers including;
• a body member having a first end and a second end, the first end being pivotally connected to the shaft at a pivot axis parallel to and spaced from the main axis;
• and
• a conical tooth member extending radially outward from the second end of the body member, the conical tooth member including a hardened tip which faces a direction of rotation of the shaft about the main axis, the conical tooth member having a longitudinal axis forming an oblique angle with respect to a line extending from the pivot axis generally through a center of gravity of the hammer.