It was developed a wood chipper consists of three main assemblies - feeding chamber, the ensemble of feed roller with gear-motor of driving and chopping chambers. The chipper allows to obtain a satisfactory size composition for the production of pellets or briquettes in a single pass of the wood through the cutting room and then through the mill. It was established as a chipper equipped with 55 kW engine can provide productivity of 600 kg / h. To charge uniform the cutting and grinding chambers is necessary that sieve hole diameter that cover the outlet channel of the material from the cutting room to be 8 mm. Power window of the chipper to the area of 543cm² and the executated holes around the body bearing of axis rotor on the wall of chamber of chipping to the area of 206 cm² have provided the pneumatic evacuation and transportation of bunker storage. It has proved necessary equipment of chipper with a drive system with switchgear of protection over electric motor loads.