Crushing the material is the absolutely necessary process of many industries.The hammer crusher has the features such as simple structure, cheap and large ratio. Its main parts include main shalft, pan, pin and hammer etc. The motor runs with the rotor. The material has been put in the feeding opening. And it is impacted by the hammer. The main shaft is the main part to do this job. Because if the shalft was forced differently between the installation and working. The main shaft will be affected by the eccentric force. And when the rotor is loaded with live load, the force frequency and structure will be more close to the natural frequency. And it will cause resounding. Therefore, the main shaft must be with good quality.
