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For primary crushing applications in mining, quarrying, aggregate production, road construction, and construction waste recycling, Qingzhou Mingxu Supply Chain Co., Ltd. provides Heavy Duty Jaw Crusher for Mining that operate on the principle of jaw plate compression. The equipment is designed to handle hard materials such as bluestone, granite, iron ore, and concrete blocks.
The crusher is configured for continuous operation, with a stable structure and adjustable discharge size. Orders can be arranged as stock machines, custom specifications, or bulk purchases, and the equipment is suitable for construction projects, aggregate plants, and mining operations.
| Item | Description |
|---|---|
| Crushing Principle | Jaw plate extrusion |
| Drive Type | Electric motor or diesel engine |
| Discharge Adjustment | Mechanical wedge or hydraulic system |
| Safety Device | Spring buffer for uncrushable material |
| Frame Construction | Welded heavy-duty steel |
| Configuration | Stationary or mobile |
| Feed Opening | Customizable based on model |
| Throughput Capacity | Dependent on model and feed size |
1. Power transmission: The motor drives the flywheels through V-belts, rotating the eccentric shaft. This causes the movable jaw to swing periodically.
2. Crushing: Raw material enters the crushing chamber from the top. The movable jaw moves toward the fixed jaw, applying compression, splitting, and bending forces to break large rocks.
3. Discharge: Material small enough to pass the discharge gap exits from the bottom. Oversized pieces remain in the chamber for further crushing. The gap can be changed by adjusting the wedge device.
4. Overload protection: When uncrushable objects enter the chamber, the spring buffer system compresses and allows the object to pass through, protecting the main components from impact damage.
Before startup:
1. Check jaw plates, bolts, and belt tension. Remove debris from the crushing chamber.
2. Adjust the discharge gap to the required size and lubricate all grease points.
3. Run the machine without load for 3–5 minutes. Begin feeding only after confirming no abnormal noise or vibration.
During operation:
1. Feed material evenly. Keep metal blocks and oversized stones out of the chamber.
2. Monitor discharge size, motor current, and bearing temperature. Stop immediately if any fault occurs.
3. Do not reach into the crushing chamber while running. Disconnect power before maintenance.
Shutdown:
1. Stop feeding and allow all material to clear from the chamber.
2. Run the machine empty for a short period before cutting power.
3. Clean dust and check wear on jaw plates and other consumable parts.
1. Heavy-duty welded frame. The structure is built to withstand impact and continuous operation in demanding mining conditions.
2. Deep crushing chamber. The chamber profile reduces dead zones, helps maintain throughput, and produces uniform aggregates with lower power consumption.
3. Adjustable discharge size. The gap between the fixed and movable jaws can be adjusted mechanically or hydraulically to control the final particle size.
4. Easy maintenance. Wear parts, including jaw plates, are designed for straightforward replacement without extensive disassembly.
5. Flexible power and configuration. Both electric and diesel drive options are available. The crusher can be installed as a stationary unit or mounted on a mobile chassis.
1. Power options: Electric motor vs. diesel engine.
Electric drive is generally used in fixed plants with reliable grid power. It offers lower operating cost and is easier to integrate with plant-wide control systems. Diesel drive is preferred for mobile units or remote locations where electricity is unstable or unavailable. The same crusher core can be fitted with either power source, and the selection is made based on site conditions and long-term operating cost.
2. Stationary vs. mobile installation.
Stationary jaw crushers are installed on a concrete foundation and are usually part of a larger crushing line with separate feeders, screens, and conveyors. They are suitable for high-volume, long-term production. Mobile jaw crushers are mounted on a trailer or skid frame and can be relocated between sites. They are often used in construction waste recycling, road projects, and temporary quarry operations. The same crushing chamber and drive components are used in both configurations, with the main difference being the supporting structure and portability.
3. Customization scope.
Feed opening size, motor power, discharge adjustment method, and auxiliary equipment can be specified at the time of order. For complete crushing systems, the jaw crusher can be combined with secondary crushers, vibrating screens, and conveyors. Process flow and equipment layout can be provided based on the customer's material type, required output, and site dimensions.
The spring buffer system serves as a mechanical safeguard against uncrushable materials. When excessive force is detected, the springs compress and temporarily enlarge the discharge opening, allowing the foreign object to pass through. Once the object is cleared, the springs return to their original position and normal crushing resumes.
Discharge size is regulated by adjusting the gap at the bottom of the crushing chamber. Mechanical wedge adjustment is simple and reliable for standard operations, while hydraulic adjustment provides faster and more precise control for applications that require frequent size changes or consistent product specifications.
1. Mining: primary crushing of iron ore, gold ore, limestone, granite, basalt, and river pebble.
2. Aggregate production: processing stone for highway, bridge, and concrete batching plant use.
3. Infrastructure: stone preparation for railway, water conservancy, tunnel, and airport projects.
4. Construction waste: crushing concrete blocks and demolition debris for recycling.
The main structure and drive components are covered for 12 months or 1,000 working hours, whichever comes first. Wear parts such as jaw plates and liners are not included in the warranty. Replacement parts can be supplied; freight and installation labor are the customer's responsibility.
Q1: Are you a factory or a trading company? Can we visit the production site?
A1: Qingzhou Mingxu Supply Chain cooperates with a dedicated crusher manufacturing workshop. Buyers are welcome to arrange a factory visit for machine inspection and material testing.
Q2: How do I choose the right jaw crusher model?
A2: The selection depends on feed size, required output, material hardness, and available power. Providing a basic description of the raw material and target production rate helps confirm a suitable configuration.
Q3: What maintenance is needed for continuous operation?
A3: Regular checks should include jaw plate wear, belt tension, lubrication points, and discharge gap setting. Daily cleaning of the crushing chamber and surrounding area helps prevent buildup. Spare jaw plates and liners should be kept on site for long projects.
Q4: Can the crusher be used in a mobile configuration?
A4: Yes. Both stationary and mobile arrangements are available. Mobile units can be equipped with diesel engines for off-grid sites, and the crusher can be mounted on a trailer or skid frame.
Q5: What is the difference between mechanical and hydraulic discharge adjustment?
A5: Mechanical adjustment uses shims or a wedge block and is set manually; it is simple and reliable for fixed production. Hydraulic adjustment allows the gap to be changed quickly and is better suited for operations that frequently switch product sizes or require precise, repeatable settings.
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West end of Yadong Street, Qingzhou Economic Development Zone, China
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