The LUMP BREAKER model RIP is designed to be used as primary crusher for materials agglomerated in lumps or sods, such as clays, bentonite, chemical products, fertilizers, casting earth. The lump breaker model RIP is mainly composed of one toothed roll that forces the material through a fixed comb, whose distance from the toothed roll is adjustable. The specially designed disposition of teeths on the roll’s surface makes the RIP breaker able to accept lumps of considerable dimensions compared to the size of the machine. Due to its working principle, this machine is suitable to process also materials with a high moisture content. The drive of the lump breaker can be provided with a device that automatically stops the machine if any hard pieces are mixed with the material to be processed.