McCloskey jaw crushers are heavy-duty mobile crushing machines built for primary crushing across mining, aggregate, and recycling sectors. Whether you need a compact unit for tight job sites or a high capacity crusher for large-scale quarry production, this range covers the full spectrum of production needs - helping you match the right machine to the material, the site, and the budget.
McCloskey International offers an exciting line up of single toggle jaw crusher models, from compact units like the J3C to heavy-duty options like the J6. Each is designed around a different jaw opening size and power class to suit specific operations and evolving requirements.
The J40 features a 1,016 × 610 mm (40″ × 24″) jaw opening paired with a 168–189 kW engine, making it a compact, highly transportable crusher with a transport width of roughly 2.5 m. Its hydraulic direct-drive grizzly feeder and folding hopper enable fast setup times - often within 10 to 15 minutes - so crews can get crushing quickly on space-restricted sites. The J40 is a popular choice for concrete, asphalt, and aggregate crushing where mobility between smaller contracts matters most.
The McCloskey J45 jaw crusher measures 45 x 27 inches (1,140 × 688 mm) and is powered by a 205–261 kW Cat engine, delivering the versatility needed for mid-size crushing demands. Weighing approximately 46,740 kg, the J45 is commonly used on East Coast job sites and is suitable for quarry work and recycling concrete. Heavy-duty bofar feeder design and steeper feeder chutes ensure reliable material flow even with variable feedstock. A main conveyor stockpile height of 3,880 mm supports strong stockpile capacity without requiring secondary conveying equipment.
The J50 is built for high production environments, featuring one of the widest jaw openings in its class at 1,270 × 735 mm (50″ × 29″). Powered by a 260–280 kW engine, it delivers higher throughput for demanding primary crushing of hard rock and large feed sizes. The main conveyor reaches a stockpile height of approximately 4,250 mm, reducing material handling bottlenecks on busy sites. This crusher is purpose-built for large-scale quarrying, boulder reduction, and high-tonnage aggregate production.
The J4 jaw crusher features a 1060mm x 700mm jaw opening and delivers 270–310 kW of power for rugged hard rock applications. It is designed for hard rock applications and enhanced productivity, with an innovative jaw chamber design that includes a deeper jaw chamber for aggressive reduction ratios. The J4 offers a 1200mm wide ToughFlex main conveyor and the J4 includes a 650mm adjustable speed recirculation conveyor. The J4 has a stockpile height of 3.44m with its conveyor. With either a two deck or 1½-deck recirculating pre screen under the hopper, the J4 separates fines before material enters the jaw chamber - boosting productivity and delivering better product quality in one pass. Optional features like an overband magnet and dust suppression make it especially capable in recycling and demolition environments.
McCloskey also produces recirculating variants (J45R, J4R, J3CR) with integrated screenboxes and return conveyors for better sizing and finished product in a single pass, as well as "E" models (J4E, J6E) that allow electric or dual-fuel operation to address emissions regulations and fuel cost concerns.
Several key features distinguish McCloskey jaw crushers and determine their fit for specific material processing applications. Understanding these attributes helps customers select the right machine - whether buying new or evaluating used crushing equipment.
The jaw opening - defined by width and gape - determines the maximum feed size a crusher can accept. A 50″ × 29″ opening on the J50 accommodates significantly larger boulders than the compact J3C's 35″ × 20″ opening. McCloskey jaw crushers utilize large jaw openings to handle large feed sizes, and models with deeper jaw chambers provide more aggressive fragmentation of hard rock. Match the opening to your typical feedstock: smaller machines work well for demolition debris and recycled concrete, while larger jaw openings are essential for quarrying virgin stone or processing oversized material.
Engine power directly affects a crusher's ability to process harder materials and sustain higher throughput. McCloskey builds most models with diesel engines - often a Cat engine in the C9 or C9.3 class - in the 200–400 hp range. Higher horsepower is critical for hard rock applications where feed is dense and abrasive. The newer "E" models add electric or genset power options, reducing fuel consumption and emissions while sometimes lowering maintenance demands. Features aimed at efficiency, like direct hydraulic drive feeders, also contribute to new productivity gains across the range.
The main conveyor and side conveyors determine how effectively crushed material moves away from the crusher discharge and how large a stockpile the machine can build. The J4, for example, delivers a main conveyor stockpile height of approximately 3.9 m, supporting large stockpiles that reduce or eliminate the need for external conveyors. Wide main and side conveyors improve material handling efficiency and overall material flow. Durable belt construction, easy maintenance access to skirting, and hydraulic folding mechanisms all reduce downtime and simplify transport between sites. These crushers improve material handling through optimized chutes and conveyors, keeping the material path clear and productive.
Pre-screening removes fines before they enter the jaw, reducing wear on jaw dies, cutting fuel consumption, and improving product quality. McCloskey offers grizzly pan feeders and double deck grizzly or double deck pre screens depending on the model. Multiple mesh options allow customization for different applications and feed conditions. Recirculating screen versions - like the J4R - add a return conveyor that sends oversize material back through the crusher, producing finished product in one pass. They feature advanced load and level sensors to optimize material flow during operation, ensuring the feeder and jaw work in balance for consistent output.
Selecting the right McCloskey jaw crusher comes down to matching machine capabilities to job requirements. Here are the criteria that actually drive the decision:
Production Capacity Requirements - Determine your target hourly tonnage. Compact models like the J40 suit lower-volume or intermittent work; the J50 and J4 are built for high capacity, sustained production. McCloskey jaw crushers are designed for high-capacity production and reliability across the full range.
Material Type and Hardness - Harder, more abrasive materials demand a robust design with greater engine power and a deeper jaw chamber. The J4 and J50 excel in hard rock; the J40 and J45 handle concrete, asphalt, and softer stone efficiently. McCloskey jaw crushers can efficiently process hard rock, concrete, and recycling materials.
Job Site Constraints - Heavy-duty tracked chassis provide exceptional mobility across challenging terrain. The machinery is typically track-mounted for mobility on job sites. Consider transport width, weight, and setup time: the J40's compact footprint and fast setup time suit urban demolition, while the J50's larger dimensions require more logistical planning.
Final Product Specifications - Crushing ratio and desired output size influence whether you need a standard model or a recirculating variant with a screen for better sizing. The deflector plate and adjustable CSS (closed side setting) give operators control over finished product gradation.
Operating Hours and Maintenance - For used equipment, evaluate machine hours, maintenance history, and parts availability. The units are designed to minimize operational downtime during routine maintenance, and open chassis designs and accessible component layouts streamline servicing. The design facilitates easy maintenance with ground-level access to key components. They are equipped with user-friendly control panels for ease of operation, including 12″ control screens and integrated telematics on newer models for remote monitoring.
McCloskey jaw crushers are used in mining, aggregate, and recycling sectors. They are commonly used in construction, mining, recycling and aggregates operations. McCloskey jaw crushers use fixed and moving jaws to compress and break materials, making them effective for primary crushing of rock, concrete, asphalt, and demolition debris. McCloskey models can integrate optional features like overband magnets for recycling, and recirculating screen versions produce finished aggregate in one pass - reducing the need for secondary equipment like a separate screen or cone crusher.
McCloskey competes directly with Sandvik, Kleemann, and other Metso lines. Performance is comparable in most size classes, with McCloskey often priced slightly lower than some competitors for equivalent jaw opening and power. The brand is known for offering enhanced durability through robust chassis construction and innovative jaw chamber design, along with features like ToughFlex conveyors and integrated recirculation. McCloskey became part of Metso Outotec in 2019, giving the brand access to a larger global parts and engineering network. Resale values tend to be strong, and used McCloskey equipment moves quickly on the secondary market.
Key inspection priorities - especially for used equipment - include jaw die wear patterns, belt and skirting condition, hydraulic system integrity, and hour meter validation through maintenance records. Parts cost for McCloskey is comparable to other premium brands, but delivery time matters more than price because downtime kills profit. Open chassis design provides easy maintenance access to critical components at ground level. When evaluating used machines, also check pre screen components, feeder condition, and structural integrity of the hopper and conveyors.
Model size, engine hours, maintenance history, and included options - such as pre screens, recirculation conveyors, overband magnets, and electric power variants - all influence pricing. New mid-size track-mounted jaw crushers generally range from $350,000–$550,000, while used units vary widely: late-model, low-hour machines may sell for $250,000–$400,000, and older, higher-hour units can fall into the $50,000–$150,000 range depending on condition. Market demand driven by infrastructure programs and supply chain conditions also affects availability and pricing in your region.
McCloskey's range of jaw crushers covers everything from compact, highly mobile units for today's projects to large-format, high production machines for sustained quarry and mining operations. Focus on matching jaw opening, power, and features to your material, your site, and your throughput targets - and for used equipment, prioritize maintenance history and wear-part condition over purchase price alone. Browse our current listings to find the right McCloskey jaw crusher for your operation.