In Double Roll Crushers, the material is crushed by a combination of compression, shear and tensile stress forces applied by the rotational energy of the opposing rolls. Because each Double Roll Crusher is custom engineered for its specific application, roll elements and tooth patterns are selected based Double Roll Crusher Catalogue Pdf To Excel Jhansi. A crusher is a machine designed to reduce large rocks into smaller rocks gravel sand or rock dust Crushers may be used to reduce the size or change the form of waste materials so they can be more easily disposed of or recycled or to reduce the size of a solid mix of raw materials as in rock ore ... Generally gyratory crushers, jaw crushers, high speed double roll crushers, low speed sizers, impactors and hammer mills are used as primary crushers. In the secondary and subsequent stages, the material is further reduced and refined for proper size and shape, mostly based on specifications. ...