Hammer mill crushers are a range of high-end machines used in the manufacturing processes of grinding solid and hard granules. The purpose of a hammer mill crusher is to produce a wide range of powder mixtures, wet or dry granulations. This manufacturing equipment also mixes various end associated products to make them useful. Rock Crushing Hammer Mills. We manufacture a large variety of hammer mills and hammer rock crushers to handle virtually any size reduction job. From our large High-Tonnage Hammer Mills to smaller Type GP Hammer Mills, we have a stone crusher solution thats suitable for your project.