CJ Jaw Crusher

What is CJ Jaw Crusher?

The European-style jaw crusher (commonly referred to in the industry as the CJ series) is a heavy-duty primary crushing machine that features a comprehensive structural upgrade over the traditional PE series jaw crusher.
Unlike standard PE models that rely on bolted frame assemblies, the CJ series utilizes a one-piece cast steel frame optimized via finite element analysis (FEA). It features a deepened, symmetrical V-shaped crushing chamber, a heavy-duty forged eccentric shaft, and oversized bearings, all complemented by a hydraulic discharge setting adjustment system.
A high-performance European-style jaw crusher engineered specifically for hard ores, granite quarries, and high-capacity aggregate processing plants. It delivers up to a 30% increase in processing capacity, significantly reduces energy consumption per ton of material, and drastically minimizes downtime for maintenance.

CJ European-style Jaw Crusher vs. PE Traditional Jaw Crusher

When selecting equipment for mining operations, many customers struggle to decide between the PE series and the CJ European-style series. The table below compares them based on actual operating conditions to help contractors and mine managers make a quick decision:

Comparison Item	CJ Series European-style Jaw Crusher	PE Series Traditional Jaw Crusher
Equipment Positioning	Heavy-duty primary crushing of hard rock; large-to-medium-scale mining projects	Economical primary crushing; small-to-medium-scale quarries; medium-to-soft stone materials
Frame Structure	Monoblock cast steel frame (impact-resistant, low stress); modular design for split transport on large models	Bolted assembly frame; suitable for moderate-impact operating conditions
Crushing Chamber	Deep, symmetrical V-shaped chamber; minimizes crushing “dead zones” and reduces the risk of jamming/stalling	Standard shallow V-shaped chamber; prone to material accumulation and clogging when processing hard rock
Discharge Adjustment	Hydraulic or heavy-duty wedge adjustment; quick gap adjustment	Shim-based wedge adjustment; adjustment process takes longer
Core Components	Thickened forged eccentric shaft; oversized heavy-duty bearings	Standard-specification eccentric shaft and bearings
Suitable Materials	High-hardness, highly abrasive rocks (e.g., granite, basalt, iron ore)	Medium-to-low hardness materials (e.g., limestone, common river pebbles)
Overall O&M	Longer wear-part lifespan and lower overall failure rate in hard-rock applications	Faster wear on jaw plates and frames; higher frequency of downtime in hard-rock applications
Procurement Cost	Higher equipment purchase cost	High cost-performance ratio; lower initial investment

If your project primarily involves processing hard rock such as granite or basalt, prioritize evaluating the CJ European-style series; if you are mainly processing medium-to-soft materials like limestone and have a limited budget, the PE series will suffice.

Core Structural Components and Engineering Specifications

Every key component of the European-style jaw crusher undergoes precision machining and is constructed from heavy-duty metallurgical materials, ensuring the ability to withstand immense mechanical impact and load-bearing forces.

Component Name	Core Function	Material Specifications
Main Frame	Withstands crushing impact loads; serves as the structural base for the entire machine	One-piece cast steel; modular cast steel components used for large models to facilitate disassembly, transport, and assembly
Fixed Jaw Plate & Swing Jaw Plate	Working surfaces that directly crush and grind the ore	High-manganese steel; optional ultra-high-manganese alloy upgrade available for highly abrasive, hard rock applications
Heavy-duty Eccentric Shaft	Transmits power and drives the reciprocating motion of the swing jaw	Forged high-carbon alloy steel; enlarged shaft diameter enhances resistance to torsional impact
Heavy-duty Bearing Assembly	Supports the rotation of the eccentric shaft	Oversized heavy-duty rolling bearings; labyrinth seals minimize dust ingress
Flywheel & Pulley	Stores kinetic energy for crushing and stabilizes operating speed	High-strength cast iron; dynamically balanced to reduce machine vibration
Toggle Plate	Transmits crushing force and acts as a mechanical overload protection component	Cast steel; designed to fail first when encountering uncrushable hard objects, thereby protecting the main unit
Discharge Adjustment Assembly	Controls the bottom discharge gap	Two configuration options: hydraulic adjustment assembly or heavy-duty wedge assembly

Working Principle of CJ European Jaw Crusher

The CJ European-style jaw crusher also relies on compression to crush material; however, thanks to design optimizations, it offers superior efficiency when processing hard rock compared to traditional PE jaw crushers. The complete workflow is as follows:

1. Feeding: Large raw stones enter the deep V-shaped crushing chamber through the top inlet;
2. Power Drive: An electric motor drives a pulley via V-belts, rotating the heavy-duty eccentric shaft and causing the swing jaw to perform a complex reciprocating motion;
3. Compression Crushing: The swing jaw periodically moves toward the fixed jaw, subjecting the rock inside the chamber to compression and bending forces, which gradually break down large material; the deep V-chamber design facilitates the downward flow of material under gravity, minimizing dead zones and reducing the risk of machine stalling;
4. Discharge: As the swing jaw retracts, the gap opens, allowing crushed stone that meets the required particle size to exit through the bottom discharge opening via gravity;
5. Recirculating Crushing: Large material that does not yet meet the size requirements remains in the crushing chamber for further crushing;
6. Continuous Production: When paired with a vibrating feeder and belt conveyor, the system enables 24-hour continuous, heavy-duty operation.

Advantages of the CHUNLEI European-style Jaw Crusher

• Powerful feeding capability: Features a deep “V”-shaped crushing chamber with optimized structural geometry and swing-jaw trajectory parameters; the long-stroke design maximizes feed size, throughput, and the crushing ratio.
• High-strength steel toggle plate: Lightweight and easy to replace; it bends rather than shatters under overload conditions, preventing damage to conveyor belts caused by the breakage and falling of traditional cast-iron toggle plates.
• Convenient adjustment: Uses a wedge-based system instead of traditional shims for discharge opening adjustment, allowing for easier, stepless adjustment.
• Extended service life: Replaces rigid mountings with elastic limit blocks and rubber shock-absorption devices, improving the performance of the machine’s dynamic balancing system and extending its service life.
• Convenient transport: The integrated motor mount design reduces the equipment’s installation footprint and ensures more stable power output.

Key Application Scenarios

Our CJ Series European-style jaw crushers are optimized for demanding operational environments:

• Open-pit hard rock mining: Primary crushing of granite, basalt, iron ore, and copper ore to prepare intermediate materials for mineral processing and subsequent crushing stages;
• Large-scale quarry aggregate production: Primary crushing of aggregates for highway and railway infrastructure;
• Construction waste recycling: Primary crushing of large concrete blocks and construction debris;
• Mobile crushing station units: Field operations and projects requiring frequent relocation;
• Industrial raw material crushing: Pre-processing of hard industrial materials such as slag and refractory raw materials.

Ancillary Equipment for the Crushing Production Line

The CJ Series European-style jaw crusher typically does not operate as a standalone unit; a typical equipment list for a complete production line includes:

1. Vibrating Feeder: Ensures uniform material feeding, screens out soil and fines, prevents heavy material from violently impacting the main crusher, and avoids clogging or stalling;
2. CJ Series European-style Jaw Crusher: Performs primary coarse crushing of large raw material blocks;
3. Belt Conveyor: Transports material between pieces of equipment;
4. Secondary Crushing Equipment: Cone crusher (preferred for hard rock) or impact crusher (for medium-soft stone) to perform intermediate and fine crushing;
5. Vibrating Screen: Grades the finished product and returns oversized particles to the crusher for re-crushing;
6. Dust Removal System: Controls dust generated during crushing to protect operators and equipment.

How to Choose the Right Jaw Crusher for Your Mine?

When selecting a European-style jaw crusher, you should not base your decision solely on model size or nominal output. The critical factors to consider are the ore properties, maximum feed size, target throughput, discharge size, and downstream equipment requirements. This is particularly important when processing hard, abrasive materials such as granite, basalt, or iron ore; choosing a crusher that is too small risks overloading, while choosing one that is too large leads to unnecessary investment costs.

• ​Consider ore properties: For highly abrasive materials like hard rock or iron ore, prioritize equipment structural strength and jaw plate wear resistance.
• Consider feed size: Select an appropriate feed opening based on the actual maximum lump size at the mine to prevent material jamming.
• Consider processing capacity: Choose a model based on actual production requirements while allowing for a reasonable capacity margin.
• ​Consider discharge requirements: Determine the discharge opening size based on the feed specifications of downstream equipment, such as cone crushers and screening units.
• Consider system compatibility: Ensure the jaw crusher’s capacity matches that of the feeders, conveyors, and downstream crushing equipment.

If you are unsure which specification to choose, please contact CHUNLEI engineers, we can assist you in selecting the most suitable model for your needs.

How to Adjust Discharge Particle Size?

The discharge particle size of the European-style jaw crusher is primarily controlled by adjusting the discharge opening (CSS – Closed Side Setting). A smaller opening yields finer finished product, while a larger opening results in coarser material.
Common adjustment methods include:

1. Adjusting the discharge opening gap: Directly adjusting the gap between the swing jaw and the fixed jaw based on the required product size is the most straightforward method.
2. Using the adjustment mechanism: Adjustment structures vary by model; always operate the equipment according to the manufacturer’s manual.
3. Considering feed size: If the feed particle size fluctuates significantly, the actual discharge size may change even if the discharge opening setting remains constant.
4. Implementing a closed-loop system with a vibrating screen: For strict product size requirements, a closed-loop circuit—consisting of the jaw crusher, a vibrating screen, and a return conveyor—can be used to send oversized material back to the crusher for reprocessing.
5. Avoiding excessively small settings: Setting the discharge opening too small can increase equipment load, reduce processing capacity, and accelerate the wear of certain consumable parts.

In actual production, it is recommended to make incremental, fine adjustments based on the target product size. If you provide the specific model of the European-style jaw crusher, the feed size, and the target discharge size, I can help you determine the appropriate discharge opening setting.

On-site Maintenance and Troubleshooting Guide

Based on past customer feedback, the following common faults are summarized for reference; please contact the manufacturer’s engineers for major malfunctions.

Symptom	Common Causes	On-site Remedial Measures
Excessive vibration and abnormal noise	Loose anchor or frame bolts; flywheel dynamic imbalance; off-center feed impact	Shut down and tighten all bolts; rebalance flywheel; ensure centered material feeding
Significant drop in actual output	Severe jaw plate wear; excessive discharge gap setting; unstable feeding	Inspect and replace high-manganese steel jaw plates; recalibrate discharge gap; service vibrating feeder
Material blockage/stalling in crushing chamber	Excessive feed rate; damp/sticky material; inclusion of large, uncrushable debris	Stop feeding, cut power, and clear crushing chamber; adjust feed rate; install upstream iron removal device
Abnormal rise in bearing temperature	Insufficient or degraded grease; dust ingress due to damaged bearing seals; incorrect assembly clearance	Replenish or replace with proper grease; service labyrinth seals; re-check bearing assembly clearance
Repeated breakage of toggle plate	Prolonged overload operation; frequent entry of hard objects (e.g., iron) into crushing chamber; excessive feed	Install iron removal equipment; strictly control feed particle size; reduce actual equipment load

Technical Parameters of CJ European Jaw Crusher

Model	Feed Port Size (mm）	Maximum Feed Particle Size (mm)	Discharge Port Adjustment Range (mm)	Processing Capacity(t/h)	Motor Power(kw)	Overall Dimensions （Length × Width × Height） (mm)
CJ96	480	930×580	60-175	105-390	4P 90	2850×2270×1950
CJ106	560	1060×700	70-200	150-500	4P 110	3280×2580×2400
CJ120	700	1200×870	70-200	175-610	4P 160	3700×2790×2950
CJ125	760	1250×950	100-250	270-831	4P 160	4230×2780×2960
CJ150	960	1400×1200	125-250	340-880	4P 200	5030×3440×3970
CJ160	960	1600×1200	150-300	430-1145	4P 250	5780×3460×3580
CJ200	1200	2000×1500	175-300	630-1435	6P 400	6600×4030×4400
CJ1511	850	1500×1070	125-300	425-1195	6P 200	4130×3000×3330
CJ1513	1040	1500×1300	150-300	530-1280	6P 200	4620×2890×4190

FAQ

Q1: What is the crushing ratio of the European-style jaw crusher?
A: The crushing ratio depends on factors such as feed size, discharge opening size, material properties, and equipment model; it should be determined based on specific operating conditions.
Q2: Can the European-style jaw crusher operate continuously?
A: Yes, it is suitable for continuous crushing operations, provided there is stable feeding, proper lubrication, and regular inspection, while avoiding prolonged overload operation.
Q3: What are the feed requirements for the European-style jaw crusher?
A: Feed size must be kept within the equipment’s permissible range; feeding should be as uniform as possible to prevent large chunks of material from entering the crushing chamber all at once.
Q4: Why does the European-style jaw crusher experience material clogging?
A: Common causes include excessive feeding, a discharge opening that is too small, high clay content in the material, or an obstructed discharge system; the specific cause should be identified based on on-site conditions.
Q5: Can the European-style jaw crusher process materials with high clay content?
A: It can handle some materials with clay content; however, if the clay content is high, it is generally recommended to add a screening or clay-rock separation stage before crushing to reduce the risk of clogging.
Q6: Can the European-style jaw crusher be used as secondary crushing equipment?
A: Yes, though this depends on the feed size and the target product particle size. In standard aggregate production lines, jaw crushers are typically used for primary (coarse) crushing.
Q7: Why does the noise level increase during the operation of the European-style jaw crusher?
A: It may be due to abnormalities in bearings, fasteners, jaw plates, or other components. If a significant change in noise is detected, the equipment’s operating status should be inspected immediately.
Q8: How do I determine when the jaw plates need replacement?
A: Monitor the wear thickness of the jaw plates and the crushing performance. Replacement should be considered when there is significant wear, a change in discharge particle size, or a drop in processing capacity.
Q9: Can the European-style jaw crusher be configured as a mobile unit?
A: Yes. Depending on project requirements, the jaw crusher can be mounted on a mobile crushing station, making it suitable for operations that require frequent relocation.
Q10: What types of production lines is the European-style jaw crusher suitable for?

A: It is commonly used in applications such as ore crushing, sand and aggregate production, and construction waste processing; it can also be integrated with vibrating feeders, cone crushers, vibrating screens, and conveyors to form a complete crushing production line.
Q11: What is the average service life of the jaw plates (tooth plates) when processing granite?
A: When processing high-silica granite (with a silica content of approximately 65%), high-quality Mn18Cr2 tooth plates typically have a service life of 400 to 800 hours (depending on feed size distribution and CSS settings). Flipping the tooth plates (swapping the top and bottom positions) midway through their wear cycle can extend the total service life by 30%–40%.
Q12: How does the dual-hydraulic wedge adjustment system work?
A: This system eliminates the traditional method of manually inserting or removing shims behind the toggle seat; instead, dual hydraulic cylinders drive two interlocking wedges to move vertically. The movement of the wedges pushes the toggle seat to shift horizontally, allowing for precise adjustment of the closed-side setting (CSS) via the control panel in less than 5 minutes.
Q13: Can the European-style jaw crusher be driven directly by a diesel engine?
A: Yes. For remote mining areas or quarries lacking a stable power grid connection, we can provide units with direct diesel engine drives, or integrate a diesel generator set with the primary crusher onto a single heavy-duty skid frame.