The crushing of material into smaller loads is usually undertaken in two steps, starting with the primary crusher that includes jaw crushers, hammer mill crushers, and gyratory crushers. Larger stones or mineral ores are used to produce smaller material. Where the material is not reduced sufficiently in the primary crusher, it is then crushed by a secondary crusher to achieve the correct size of the material.
Wear on parts of the crushers affect the performance and volume of material being crushed, the parts subject to high impact, and abrasive wear include the hammers, rotors, teeth, and mantles. Failure to maintain these parts can lead to premature failure, resulting in long shutdown times and an increase in maintenance costs.