Jaw crusher is a kind of coarse crushing equipment, which is mainly used for crushing stone and ore, such as river pebbles, pebbles, granite. The jaw crusher first appeared in 1858. It was first widely used in road construction and later in mines. It can now be used for medium-sized crushing of various ores and large materials. The maximum compressive strength of the crushed material is 320 MPa. It also has the characteristics of large crushing ratio, uniform product granularity, simple structure, reliable work, easy maintenance, and economic operation costs. When the stone crusher project report india, the motor is used as the driving force, and the eccentric shaft is driven by the V-belt and the grooved pulley through the motor pulley to make the movable jaw reciprocate according to the predetermined trajectory. The materials in the crushing cavity composed of plates are crushed, and the finished materials are discharged through the lower discharge port. The discharge port (discharge port) can be adjusted according to user needs to obtain qualified product material size. The granules crushed by the crusher are different for different equipment and materials purchased by customers. So, how to adjust the output particle size? 1. By adjusting the tension spring and the adjusted back wedge, use two wedges placed between the rear seat of the thrust plate and the frame to adjust the size effect of the particles. This method is suitable for small crushers. 2. Adjusting shims, that is, placing a set of shims between the back of the support plate of the rear thrust plate and the rear wall of the rack. By increasing or decreasing the number of shims or changing its thickness, the purpose of adjusting the ore discharge can be achieved.