A jaw crusher is a compression type crusher, comprised of a fixed jaw and moving jaw positioned in a (V). The movable jaw compresses material against the fixed jaw, crushing the material to the desired size. The material exits the jaw through the bottom of the crusher otherwise, known as the discharge opening. Changing the discharge opening controls the product size made by the crusher.
Jaw crushers are mainly used at the primary stage of material reduction in several applications, including rock quarries, sand and gravel, mining, construction and demolition recycling, construction aggregates, metallurgy, and chemical industries.
A jaw crusher’s flywheel, toggle plates, pitman, eccentric shaft, and driving motor generate the crushing action and provide the energy needed to break the material.
There are some different styles of Jaw Crushers, the most common being the overhead eccentric jaw (shown above) or a double toggle jaw.
Depending on the application requirements, jaw crushers are available in stationary, wheeled portable, and track-mounted options.
Jaw crushers are often designated by the size of the top opening where material enters. The openings tend to be either rectangular or square and are referenced in inches. For example, a 3244 or 32×44 jaw crusher has a 32” by 44” opening, 32” being the gap at the top between the jaw dies and 44” being the width between the side plates.