CEM is a U.S. manufacturer and supplier of stationary heavy duty/high production Disc-type log chippers, wood microchip chippers, chipper parts, engineered upgrades and technical services for CEMs products. With equipment operating on 6 continents, CEMs patented technologies provide owner/operators of chip mills, pulp mills and pellet/biofuels plants around the world with exclusive advantages in areas of woodyard and chip mill safety, reliability, production capability and both conventional woodchip and microchip quality. Because so many wood chipping lines struggle to meet their required chip production and/or chip quality levels because of limitations at their chipper, CEMs high production heavy duty wood chippers are preferred over all others. Gains are often possible by simply replacing an existing production-limiting disc chipper with a CEM chipper with more knives. CEMs Heavy Duty chippers vary in size from 96 (2.4 M) to 140 (3.5 M) diameter discs and are typically provided with 12 to 20 knives. The extremely high value of stand-alone upgrades of existing facilities is that they often require little infrastructure modification except for replacement of the chipper in order to realize substantial performance improvements of the entire chipping system.