In this type of crusher, reduction takes place between a stationary jaw plate and a moving jaw plate. The moving jaw plate is mounted on the pitman, which is given a reciprocating motion. Crushing takes place when the pitman moves toward the stationary jaw, compressing the material.
There are two main types of jaw crushers – single toggle and double toggle.
McLanahan produces single toggle jaw crushers, which feature a pitman mounted on an eccentric shaft at the top. At the bottom of the assembly, the pitman is held in position by a toggle plate. The combination of eccentric motion at the top and rocking motion at the bottom provides a positive downward thrust throughout the crushing chamber.
Single toggle jaw crushers have better feed acceptance capability than the corresponding double toggle crushers. Jaw crushers are reliable, robust machines, offering a 6:1 reduction ratio in most applications, and will accommodate hard, abrasive materials.
Designed to be a higher performance primary crushing solution than has ever been available, the Freedom™ Jaw Crusher features an increased crushing capacity of 15 percent, while maintaining the same physical and power footprint as other jaw crushers. That means the Freedom™ 4450 Jaw can produce what another manufacturer’s 50″ x 60″ jaw would typically produce. This crusher is ideal for a greenfield site, as well as replacing an existing primary crusher since it’s designed to deliver the lowest cost per ton available in the market.
Introduced in 1906, McLanahan’s Universal Jaw Crusher was one of the first overhead eccentric jaw crushers. Since that time, this robust crusher has continued to be the basis of the Universal Jaw Crusher design. Today, it is available with either traditional hydraulic-shim adjustment or adjust-on-the-fly capabilities with analog control. It can be used in a variety of operations, including rock quarries, sand and gravel, mining, C & D recycling, construction aggregates, and by road building contractors. Materials processed by the Universal Jaw Crusher include limestone, granite, basalt, gravel, gold ore, copper ore, iron ore, limestone, gypsum, concrete rubble and more.