What is a Jaw Crusher?
A jaw crusher is a primary crushing machine widely used in mining, construction, and recycling industries. It reduces large rocks and ores into smaller, more manageable particles through compression. Its working principle is similar to a human jaw, crushing material between a fixed jaw plate and a reciprocating movable jaw plate within a V-shaped chamber.
Types of Jaw Crusher
Single-Toggle Jaw Crusher: Features an eccentric shaft at the top of the movable jaw, creating a "chewing" motion that results in higher processing capacity but relatively more wear on the jaw plates.
Double-Toggle Jaw Crusher (Blake Type): Uses a pivot shaft at the top and an eccentric shaft at the bottom to drive toggle plates. This design provides more controlled and powerful compression, making it suitable for extremely hard and abrasive materials.
PEX Series (Fine Jaw Crusher): Specifically designed for secondary or tertiary crushing to produce smaller, more uniform products.
Mobile and Tracked Jaw Crushers: Self-propelled units mounted on tracks or wheels for on-site processing, popular in demolition and recycling industries.
Key Features of Jaw Crusher
Compression Crushing: Effectively handles hard, abrasive materials like granite and basalt.
Adjustable Output (CSS): The Closed Side Setting (CSS) can be adjusted to control the final product size.
Heavy-Duty Build: Constructed with an all-steel frame and high-manganese steel jaw plates for durability and longevity.
Low Maintenance: Features a simple mechanical design with fewer moving parts compared to other crusher types.
Jaw Crusher Customization Options
Manufacturers often offer custom configurations based on specific project requirements:
Jaw Profiles: Various tooth configurations (corrugated, smooth, or heavy-duty) to optimize performance for different material types.
Drive Systems: Options include diesel-direct, diesel-hydraulic, or electric power drives.
Auxiliary Equipment: Integration of overband magnets for rebar removal, dust suppression systems, and wireless remote controls.
Jaw Crusher OEM Process
Original Equipment Manufacturing (OEM) for jaw crushers involves specialized metallurgical and engineering steps to ensure the machine can withstand extreme pressure.
Design & Engineering: Customizing the crushing chamber, jaw plate profiles, and drive systems (electric or diesel-hydraulic) to meet specific output requirements.
Material Selection: Using high-strength materials such as Q345B steel plates for side frames and high-manganese steel for crushing jaws to maximize wear resistance. Low-temperature resistant steel can be selected for extremely cold regions.
Fabrication & Welding: Cutting and welding steel plates into a robust frame. High-end manufacturers use annealing after welding to relieve internal stress and prevent structural cracking.
Precision Machining: Machining the eccentric shaft, bearing housings, and movable jaw face to tight tolerances, ensuring smooth operation and efficient crushing force.
Quality Testing: Conducting non-destructive testing (NDT), such as ultrasonic and liquid penetrant inspection, to detect microscopic flaws in castings and welds before assembly.
Jaw Crusher Price
Determining the price of a jaw crusher requires balancing initial capital expenditure with long-term operating costs. Prices for standard industrial stationary models used in quarries typically range from $30,000 to $200,000. For high-capacity operations requiring mobile track-mounted or wheel-mounted units, the price may vary due to the integrated power unit and additional configurations. Key price drivers include motor power (kW), the grade of manganese steel used in wear parts, and whether the system includes hydraulic adjustment features for the discharge setting.
Jaw Crusher Supplier
PASCAL is a professional jaw crusher supplier, with its factory established in 2017, based in Luoyang, China. The company serves as a global supplier of heavy industrial machinery, specializing in crushers and various mechanical equipment used in the mining and construction sectors.
Jaw Crusher FAQ
How do I adjust the output size?
This is done by modifying the Closed Side Setting (CSS) using hydraulic or mechanical wedge systems.
What is the "Nip Angle"?
It is the angle between the fixed and movable jaw plates; if this angle is too large, the material may be "ejected" rather than crushed.
Why is my crusher vibrating excessively?
This often indicates issues such as loose foundation bolts, bearing failure, or an unbalanced flywheel.
When should I flip the jaw plates?
Most jaw plates are symmetrical. Once the bottom section shows significant wear, they can be rotated 180 degrees, effectively doubling their service life.
