High-Torque Screen Classifying Cutter Crushes Oversized Materials
Munson Machinery’s new high-torque, low-speed model SCC-15-SS screen classifying cutter reduces hard materials and friable products into controlled particle sizes. A proprietary rotor design includes cutter bits attached to a helical array of staggered holders called “interconnected parallelograms” that continuously cut and crush oversize materials against twin, stationary bed knives.
Unlike high-shear cutters that rotate at high speeds, the high-torque cutter is equipped with a direct-coupled, gear-reduced drive that rotates the shaft at speeds down to 10 rpm to cut or crush tough materials using low-shear, and/or to minimize fines when cutting friable materials.
The cutter bits, which are available in stainless steel, tool steel and tungsten carbide, can be slid onto holders and secured with one retaining socket-head screw, allowing rapid replacement. The SCC-15-SS positions the bits along the entire shaft, with no frontal gaps, reducing material into uniform pieces with minimum imperfections or fines and little to no generation of heat.
The new cutter has a 15-inch throat width that accommodates up to 30 parallelograms with 60 bit inserts. Perforations of the bed screen range from 1/32 of an inch to 1.5 inches in diameter and up to 3 inches square, allowing the reduction of materials into uniform particles in sizes down to 20 to 30 mesh. Material is fed through the top of an adjustable, double-baffled intake chute or directly into the front of the chute through a hinged door.