McCloskey unveils versatile new J4 jaw crusher model

McCloskey International has unveiled the new J4 jaw crusher, boasting powerful new features for hard rock applications. 

The J4 builds on the features of the existing design, while adding new productivity with an exciting line-up of features and options aimed at boosting productivity and offering enhanced durability across applications.

Designed to withstand the toughest conditions worldwide, the J4 delivers high production due to its innovative jaw chamber design and enhanced material flow. The large 1060 mm x 700 mm (42 in x 28 in) jaw opening accommodates large feed sizes, contributing to higher production in material processing.

The material path is enhanced with the 1064 mm x 4247 mm (41.9 in x 167.2 in) 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.

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

Stockpiling with ToughFlex

McCloskey claims that the J4 delivers industry-leading stockpiling, with its wide main and side conveyors enhancing material flow. The angle adjustable 1200 mm (48 in) wide ToughFlex main conveyor boasts a 3.912 m (12 ft 10 in) high stockpile, and quick release and ground level access make for easy maintenance and service.

ToughFlex is constructed with a special weave of 2 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 its 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 650 mm (26 in) adjustable speed belt fueling a stockpile height of 3.44 m (11 ft 3.6 in). In addition, the recirculation conveyor can be rotated 90 degrees to be used as a stockpiling conveyor.


According to McCloskey, its 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 maximize the efficiency of any project site.

Safety and security

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.

“The J4 continues the momentum for our jaw crushing product range, as we continue to develop new products that meet the evolving needs of our customers across industries,” said Toni Laaksonen, senior vice president, McCloskey International. “We have always designed our equipment to ensure it contributes to the productivity and business success of these operations. As a company that is involved in the handling and processing of the earth’s resources,  we also have our sights set on sustainability. Our next commitment to an environmentally responsible strategy will be the introduction of our electric crushers, scheduled to be available in 2023.”