Small jaw crusher is mainly used as coarse crushers and medium crushers in mining, building materials, and infrastructure departments. According to the width of the feeding port, it can be divided into three types: large, medium, and small. The jaw crusher with feed opening width greater than 600mm is large-scale jaw crusher machine, the one with feed opening width between 300-600mm is medium-sized jaw crusher machine, and the one with feed opening width less than 300mm is small-sized jaw crusher machine.