The oscillating granulator is used in the pharmaceutical industry almost exclusively for size reduction of wet and dry granulations, and to some extent reducing tablets and compactions that must be recompressed. This equipment consists of an oscillating bar contacting a woven wire screen. A hopper above the oscillator and screen provides a receptable for the feedstock that is forced through the screen by the oscillating motion of the bars. Size reduction is primarily by shear with some attrition. Collection of the product may be directly onto trays in the case of wet granulations, or into drums via a sleeve from specially fitted collector funnel which minimizes dust during the processing of a dry granulation. The oscillator speed is constant, and the screens, which are readily interchangeable, range in size from 4 to 20 mesh.