A crusher is a machine that mechanically reduces large chunks of rock, stone, or ore into smaller, uniform-looking aggregates. Crushers typically come in jaw, cone, or impact configurations. Material is fed into the crusher via a vibrating feeder. The initial crushing breaks down large rocks; further processing continues until the desired particle size is reached. Vibrating screens then classify the material by size. Oversized particles are returned to the crusher. Crushers are widely used in road building, concrete and asphalt plants, dams and bridges, quarries, mining sites, and recycling yards.

A mobile crusher is a portable crushing and screening plant mounted on wheels or tracks. It processes material on-site and eliminates the need for transport. It features a feeder, crusher, screens, and conveyors and operates on diesel or electric power. Mobile crushers suit construction sites, road projects, temporary mining operations, recycling centers, and post-disaster recovery. They offer quick setup but lower capacity compared to stationary plants.

A stationary crusher is a fixed, high-capacity crushing and screening facility installed on concrete or steel foundations. It is used in large quarries, mining operations, port fill projects, and concrete or asphalt plants. Material is loaded from bunkers or silos and initially crushed in a primary crusher. It goes through secondary crushers and vibrating screens for size classification. PLC automation enables continuous, 24/7 production with precise control and high efficiency.

Differences between stationary and mobile crushers–Mobile units are transportable, quick to deploy, and require minimal infrastructure but offer medium output capacity. Stationary systems require infrastructure investment and longer installation, cannot relocate, but boast high production capacity and lower unit costs—ideal for long-term operations.

A secondary impact crusher is used to further reduce material after primary crushing. It relies on impact force to fragment rocks. Material is fed into a high-speed rotor and struck against vertical or horizontal impact plates, breaking into smaller fragments. Vibrating screens then size-grade the output. These crushers are common in mining and aggregate applications where a second crushing stage is needed, especially in asphalt plants, recycled concrete crushing, and aggregate production.