Worm 1, rotating about fixed axis A, meshes with worm wheel a of drum 2 which has internal helical ribs b. In rotation of worm 1, drum 2 rotates about fixed axis 0, feeding logs to rotor 3 which rotates rapidly about fixed axis B. Cutting elements of rotor 3 cut the wood into chips used for particle board, etc. Hatch 4 is for loading logs into the working zone.
$527$SL,FD$