A hammer crusher is a machine whose purpose is to shred material into fine particles. They have many sorts of applications in many industries, including:

    The concept is fairly straightforward. A hammer crusher is essentially a steel drum containing a vertical or horizontal cross-shaped rotor on which pivoting hammers are mounted. The hammers are free to swing on the ends of the cross. The rotor is spun at a high speed inside the drum while material is fed into a feed hopper. The material is impacted by the hammers on the ends of the rotating cross and thereby is shredded and expelled through screens in the drum.

    Slow speed horizontal pallet grinder. Small grain hammer crushers can be operated on household current. Large automobile shredders can use one or more 2000 horsepower （1.5 MW） diesel engines to power the hammer mill.

This text is from Henan Yuhui mining machinery Co., Ltd.  http://www.cnhnyh.com/