The material to be crushed enters the wood shredder machine through gravity feed hopper having an adjustable slide to control the feed material. The material is crushed between the hammers and serrated liners. A powerful blower in wood shredder machine continuously sucks the ground material through a screen classifier and conveyed through the pipe into the cyclone for bagging. The blower maintains constant airflow in the wood shredder machine chamber in order to obtain a cool product and continuously cleans the screens, thus increasing the output. Particle size of the ground material can be varied over a large range by using sieves with the desired openings of corn wood chipper shredder for sale.