This series of machine are suitable for wood chips preparation in the paper pulp, and wood-based panel industries, as well as the chip production bases, by which logs and small wood are cut into high quality chips with even length, smooth chip cut and uniform chip thickness. It is also possible for the chipping of branches and twigs, as well as planks, etc. The chipper consists of frame, knife disc, feed and discharge spout, hood and electrical control system, etc.