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New McCloskey J4 jaw crusher

McCloskey International has unveiled the new J4 jaw crusher, boasting powerful new features for hard rock applications. The J4 builds on the robust quality of the existing design, while adding new features and options to boost productivity and durability. The J4 is said to deliver high production due to its innovative jaw chamber design and enhanced material flow. The large 1,060x700mm jaw opening accommodates large feed sizes, contributing to higher production in material processing.

The material path is enhanced with the 1,064x4,247mm grizzly pan feeder under the hopper that allows for better sizing of material with a variety of mesh options. Options of either a short pan feeder to suit the pre-screen or a double deck grizzly pre-screen are available, ensuring suitability and better sizing of material based on the required end product.

McCloskey reckons the J4 jaw crusher leads its class in size and number of decks offering a choice of either a 2-deck or 1.5-deck system. The 2-deck delivers an extra product spec over the mid-size product conveyor. The J4 is said to be the only jaw crusher that offers oversize recirculation for a higher end product specification.

The J4 also delivers excellent stockpiling, with wide main and side conveyors for enhanced material flow. The angle adjustable, 1,200mm-wide ToughFlex main conveyor boasts a 3.912m high stockpile, and with quick release and ground level access, with the belt being easy to maintain and service.

ToughFlex is constructed with a special weave of two fabric plies and an additional binder warp (without the need for steel wire) resulting in reduced belt weight. The plies are reinforced to resist puncturing and are protected with heavy duty wear resistant top and bottom covers. At the end of it's lifespan, ToughFlex belts can be easily recycled unlike belts reinforced with a metal ply.

While a side conveyor remains an option for many jaw crushers in its class, the J4’s integral folding conveyor is standard and has an 650mm adjustable speed belt fueling a stockpile height of 3.44m. In addition, the recirculation conveyor can be rotated 90 degrees to be used as a stockpiling conveyor.

McCloskey engineers have designed the J4 to meet the evolving requirements of today’s projects and operations. Despite the position of the J4 as a powerhouse, portability has not been compromised. Mobility on-site and between sites continues to be a feature with remote control tracks to easily move and position the crusher and maximise the efficiency of any project site.

The J4 is equipped with a number of features to ensure the workplace and the operator are secure. Engine safety shutdown systems, start-up alarms, full safety guarding, external maintenance access and a tagout capability on the isolator all contribute to the safe operation and maintenance of the equipment. Ground level access also promotes safety, and allows for quick service and maintenance, reducing the downtime for the operation.

Such crushers as the J4 are suited particularly to aggregates, construction and demolition recycling, and site preparation.

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