Worm 1, rotating about fixed axis A, meshes with worm wheel a of feeding member 2. Upon rotation of worm 1, feeding member 2, having conical threads on its inner surface, pulls log 3 downward and feeds it to the working surface of conical rotor 4 which rotates rapidly about fixed vertical axis x-x. Cutting elements of rotor 4 cut the wood into chips used for particle board, etc.
$528$SL,FD$