Jaw Crusher

What is a Jaw Crusher? What is its Core Purpose?

The core purpose of a jaw crusher is primary crushing. It is the first step in the material processing line, responsible for reducing large-sized raw materials into smaller particles that can be further processed by secondary crushers (like cone crusher, impact crusher) or grinding equipment (like ball mill).Jaw crushers are the most widely used primary crushing machines due to their simple structure, reliable operation, easy maintenance and strong adaptability to various hard and abrasive materials. They are designed for heavy-duty continuous work, serving as the “first gate” of material crushing in mines, quarries and construction sites.

How Does the Jaw Crusher Crush Large Rocks into Small Particles?

The Jaw Crusher works on the principle of crushing by extrusion and bending.It consists of a fixed jaw plate and a movable jaw plate. When the eccentric shaft drives the movable jaw to reciprocate, the two jaw plates periodically approach and separate.

• The Crushing Zone: When the movable jaw approaches the fixed jaw, materials between them are squeezed, bent and split, thus being crushed into small pieces.
• The Discharging Zone: When the movable jaw moves away, crushed materials fall down through the discharge opening under gravity, completing the crushing cycle.

The stroke and frequency of the movable jaw are precisely designed to ensure high crushing efficiency and uniform particle size. Our LEIKE jaw crusher operates at the optimal motion track to maximize crushing force and minimize energy consumption.

Primary Crushing vs. Secondary Crushing: Which Process Should You Choose?

The selection of jaw crusher as primary or secondary crusher depends on your material size and production process.

Primary Jaw Crusher

90% of jaw crushers are used for primary crushing. It handles large raw materials directly from mines or quarries.

Why choose it: Large feed opening, strong crushing capacity, suitable for all kinds of hard and soft materials, can crush large rocks into medium particles for secondary processing.

Secondary Jaw Crusher

Rarely used as secondary crusher, only for some special materials with low hardness. It is usually replaced by cone crusher or impact crusher for better grain shape.

Note: LEIKE manufactures full series of primary jaw crushers, which are the best choice for the first stage of crushing in mining and quarrying production lines.

Jaw Crusher Types

According to the structure and motion mode:

Single toggle jaw crusher: Simple structure, light weight, low cost, suitable for small and medium-sized production.

Double toggle jaw crusher: Stable operation, strong crushing force, long service life, suitable for large-scale hard material crushing.

Mobile jaw crusher: Integrated with vehicle-mounted chassis, flexible movement, on-site crushing, suitable for construction waste and short-distance projects.

Different jaw crusher applicable materials

• Hard materials: Granite, basalt, quartz, iron ore, copper ore (double toggle jaw crusher recommended) Medium-hard materials: Limestone, pebble, rock phosphate (single toggle jaw crusher recommended) Special materials: Construction waste, concrete (mobile jaw crusher recommended)

Single Toggle vs. Double Toggle: Which Structure Suits Your Material?

There are two main structural types of jaw crushers, which determine the crushing performance and application scenarios.

• Double Toggle Jaw Crusher (For Hard Materials)
• This design has two toggle plates to drive the movable jaw, with stable motion and strong crushing force.
• Advantage: Strong wear resistance, suitable for crushing high-hardness and highly abrasive materials, long service life of jaw plates.
• Capacity: Higher crushing efficiency for large hard rocks, lower failure rate in heavy-duty working conditions.
• Single Toggle Jaw Crusher (For Medium-Hard Materials)
• This design uses one toggle plate, with simpler structure and lighter weight.
• Advantage: Small size, easy installation and maintenance, lower investment cost, suitable for small and medium-sized production lines.
• Usage: Recommended for medium-hard materials like limestone, pebble, and small-scale mining or quarrying projects.

Crushing Production Line Design

Jaw crushers for sale

If you are interested in jaw crusher, please feel free to contact us! We will provide you with more than two solutions for you to choose from.

Wearing Parts

• Jaw Plate: The key wearing part, made of high manganese steel with high wear resistance and impact resistance.
• Toggle Plate: Safety part, protects the crusher from overload damage.
• Bearing: High-quality rolling bearing, stable operation, long service life.Common specifications: Customized according to crusher model, with high interchangeability.

• Common specifications: Customized according to crusher model, with high interchangeability.

Jaw Crusher Liner

• High Manganese Steel Liner: High impact toughness, work-hardening under pressure, suitable for hard materials.
• High Chromium Alloy Liner: Higher wear resistance, longer service life, suitable for highly abrasive materials.
• Customized thickness: 50-120mm, according to jaw crusher specifications and material characteristics.

Technical Parameters of Jaw Crusher

Model	Rotate speed (r/min)	Jaw plate size (mm)	Feed size (mm)	Discharge size (mm)	Capacity (t/h)	Motor power (KW)	Weight (T)
PE250×400	275	250×400	≤210	20-60	1-5	15	2.8
PE400×600	270	400×600	≤340	40-100	5-20	30	7
PE500×750	250	500×750	≤425	50-100	15-30	45	10.5
PE600×900	250	600×900	≤500	65-160	30-55	55	15.5
PE750×1060	250	750×1060	≤630	80-140	45-80	75	28
PE900×1200	230	900×1200	≤750	100-200	65-120	110	50
PE1000×1200	200	1000×1200	≤850	120-220	80-130	110	58
PE1200×1500	180	1200×1500	≤1020	150-250	100-180	160	100
PE1500×1800	160	1500×1800	≤1200	200-350	150-300	280	180

Mobile Jaw Crusher – Advantageous Products

Leike Machine specializes in providing custom-designed mobile jaw crushers, offering unparalleled flexibility and efficiency for your on-site crushing needs. Unlike traditional, fixed-position jaw crushers, our mobile units are integrated with feeding, crushing and conveying systems, engineered for convenient transportation and usage across various locations. This means you can bring the processing power directly to your material, eliminating the costly and time-consuming process of transporting materials to a separate crushing plant.

LEIKE hot sale Jaw Crusher

Why is Output Size Critical for Downstream Crushing or Grinding?

LEIKE Machine specializes in providing custom-designed mobile jaw crushers, offering unparalleled flexibility and efficiency for your on-site crushing needs. Unlike traditional, fixed-position jaw crushers, our mobile units are integrated with feeding, crushing and conveying systems, engineered for convenient transportation and usage across various locations. This means you can bring the processing power directly to your material, eliminating the costly and time-consuming process of transporting materials to a separate crushing plant.

Why is Output Size Critical for Downstream Crushing or Grinding?

The discharge size of jaw crusher directly affects the efficiency of subsequent equipment.

• Suitable discharge size: Reduces the load of secondary crushers and ball mills, improves overall production efficiency, extends the service life of downstream equipment.
• Oversized discharge: Causes blockage and excessive wear of downstream equipment, reduces production capacity.
• Chemicals: You can add lime or other reagents directly into the mill to start the chemical conditioning early.
• Oversized discharge: Causes blockage and excessive wear of downstream equipment, reduces production capacity.
• LEIKE jaw crusher can adjust the discharge opening steplessly to meet different downstream processing requirements.
• Jaw crusher structure and working principle
• Feeding mouth 2. Fixed jaw plate 3. Movable jaw plate 4. Eccentric shaft 5. Bearing
• Toggle plate 7. Adjustment device 8. Discharging mouth 9. Frame 10. Pulley
• The jaw crusher consists of feeding part, crushing part, transmission part, adjustment part, frame and other main parts. The jaw plate is made of high manganese steel, the eccentric shaft is forged from high-quality steel, with high strength and wear resistance, ensuring stable operation under heavy load.

Working Principle of Jaw Crusher

The motor drives the pulley and eccentric shaft to rotate through the V-belt. The eccentric shaft drives the movable jaw plate to reciprocate periodically. When the movable jaw plate approaches the fixed jaw plate, materials are crushed by extrusion and bending. When the movable jaw plate moves away, crushed materials are discharged from the discharge opening under gravity. The adjustment device can change the discharge opening size to get the required particle size.

Why LEIKE Machine jaw crushers?

LEIKE Machine is dedicated to providing efficient and reliable crushing solutions. With over 20 years of crushing equipment technology experience, we produce durable and robust jaw crushers that deliver higher value at lower costs.

• High crushing capacity: Capable of continuous operation with a maximum capacity of up to 1000 t/h, meeting large-scale production needs. Energy efficiency: Optimized motion track reduces energy consumption by 10%–15% compared with traditional models. Durable parts: Jaw plates use high manganese steel and high chromium alloy materials, with 30% longer service life. Flexible design: Stepless discharge adjustment, suitable for different material sizes and production requirements. Optional mobile chassis is available. Reliable lubrication: Centralized lubrication system, easy maintenance, no oil leakage, long bearing life. Eco-friendly: Closed dust-proof design, reduces dust pollution, suitable for urban construction waste treatment. Quality service: LEIKE Machine offers ample wearing parts supply, including jaw plates, toggle plates and bearings, minimizing maintenance and replacement time.

Steel Liners vs. Rubber Liners: Which Material Lasts Longer?

LEIKE Machine is dedicated to providing efficient and reliable crushing solutions. With over 20 years of crushing equipment technology experience, we produce durable and robust jaw crushers that deliver higher value at lower costs.

High crushing capacity: Capable of continuous operation with a maximum capacity of up to 1000 t/h, meeting large-scale production needs.

• Energy efficiency: Optimized motion track reduces energy consumption by 10%–15% compared with traditional models.
• Durable parts: Jaw plates use high manganese steel and high chromium alloy materials, with 30% longer service life.
• Flexible design: Stepless discharge adjustment, suitable for different material sizes and production requirements. Optional mobile chassis is available.
• Reliable lubrication: Centralized lubrication system, easy maintenance, no oil leakage, long bearing life.
• Eco-friendly: Closed dust-proof design, reduces dust pollution, suitable for urban construction waste treatment.

• Eco-friendly: Closed dust-proof design, reduces dust pollution, suitable for urban construction waste treatment.

• Quality service: LEIKE Machine offers ample wearing parts supply, including jaw plates, toggle plates and bearings, minimizing maintenance and replacement time.

High Manganese Steel vs. High Chromium Alloy: Which Jaw Plate Lasts Longer?

The jaw plate is the key wearing part of jaw crusher, and its material directly affects the service life.

• The jaw plate is the key wearing part of jaw crusher, and its material directly affects the service life.
• High Manganese Steel Jaw Plate
• Traditional choice, high impact toughness, work-hardens under pressure, self-improves wear resistance during use.
• Best for: Primary crushing of large hard materials, strong impact working conditions.
• High Chromium Alloy Jaw Plate
• New type wear-resistant material, higher hardness and wear resistance, lower wear rate.
• Best for: Highly abrasive materials, long-term continuous production, reduces replacement frequency.
• The LEIKE Advantage: High chromium alloy jaw plates last 1.5 to 2 times longer than high manganese steel in abrasive material crushing, reducing production downtime and maintenance costs.

How Does the Discharge Opening Adjustment Affect Production Efficiency?

The discharge opening size is the key parameter of jaw crusher, which determines the output size and capacity.

The Logic

• Larger discharge opening: Higher capacity, larger particle size, suitable for primary crushing.
• Smaller discharge opening: Lower capacity, smaller particle size, suitable for pre-crushing before grinding.
• The Adjustment Method
• LEIKE jaw crusher uses wedge or gasket adjustment device, which can realize stepless adjustment of discharge opening size. Operators can adjust it according to downstream process requirements to achieve the best matching between capacity and particle size.
• Common mistake: Setting the discharge opening too small for primary crushing, which reduces capacity and increases wear. It is recommended to set according to the recommended parameters of the model.ing friction is significantly lower than sliding friction. By switching to rolling bearings, we reduce the starting torque required to turn the mill. This means you can use a smaller motor or simply consume less electricity for the same work.

Rolling Bearings vs. Sliding Bearings: Can You Really Save 15% Energy?

Traditional jaw crushers use sliding bearings, which require complex lubrication systems and have large friction resistance.

• The Modern Shift: LEIKE adopts high-quality double-row spherical rolling bearings for all jaw crushers.

• The Benefit: Rolling friction is much smaller than sliding friction, reducing starting torque and operation energy consumption.

• Data: Our clients typically report 10% to 15% energy savings with rolling bearings.

• Maintenance: Grease lubrication, no need for high-pressure oil station, simple maintenance, no oil leakage, suitable for 24/7 continuous operation.

Open Circuit vs. Closed Circuit: Why Pair a Jaw Crusher with a Vibrating Screen?

Running a jaw crusher alone is called “Open Circuit”. The material is crushed once and discharged, with uneven particle size.

The Optimization (Closed Circuit)

Pair the jaw crusher with a vibrating screen to form a closed circuit.

• Unqualified large materials return to jaw crusher for re-crushing

• Jaw crusher crushes materials

• Vibrating screen screens the crushed materials

• Qualified materials enter the next process

Why acts differently

Closed circuit improves the uniformity of discharge particle size, avoids over-crushing or under-crushing, increases overall production efficiency by 20% to 30% compared with open circuit.

How to Calculate the Correct Jaw Crusher Capacity for Your Plant?

Sizing a jaw crusher needs professional calculation, not a guess.

Factors we need from you

1. Material hardness: Bond Work Index, harder materials need larger models.
2. Feed size: Maximum size of raw materials, determines the feed opening size of jaw crusher.
3. Target discharge size: Required particle size for downstream processing.
4. Hourly capacity: Required output per hour.

Reference: PE600×900 jaw crusher can crush 30-55 tons per hour of granite, PE900×1200 can crush 65-120 tons per hour.

Do not buy blindly. Send us your material information, and our LEIKE engineers will select the best model and design the production line for you.

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