What are Crusher Wear Parts / Spare Parts?
Crusher wear parts and spare parts are the fundamental components that ensure the normal operation and high efficiency of crushing equipment. They encompass everything from core structural components like the frame and main shaft, to wear parts such as jaw plates, blow bars, mantles, and concaves, to components from auxiliary systems like transmission, lubrication, and hydraulics. The quality of these parts directly impacts the crusher's production efficiency, product particle size, and operating costs. Choosing high-quality, well-matched parts is key to ensuring the stable operation of a crushing production line.
Main Types of Crusher Parts
Wear Parts
Jaw Plates (Jaw Dies): The core wear parts of a jaw crusher, consisting of fixed and movable jaw plates that directly contact and crush the material. Manufactured from high manganese steel (e.g., Mn13, Mn18) or alloy wear-resistant steel. Tooth profiles can be designed based on material characteristics (e.g., corrugated, wedge-shaped, triangular).
Blow Bars: Key wear parts for impact crushers and vertical shaft impact crushers. Mounted on the rotor, they impact the material at high speed. Commonly made from high-chromium iron, alloy steel, or composite materials with carbide inserts. Require periodic replacement or flipping.
Mantles (Moving Cone Liners) and Concaves (Fixed Cone Liners): Wear liners for cone crushers. The concave is fixed to the frame, and the mantle is mounted on the cone head; together they form the crushing chamber. Made from high manganese steel or alloy wear-resistant steel, available in various cavity profiles (Standard, Short Head, etc.).
Impact Plates: Wear parts located in the upper part of the impact crusher crushing chamber, working together with the blow bars to crush material. Typically made from high-chromium iron or wear-resistant steel.
Distributor Tips (Impeller Shoes): Critical wear parts on the rotor of a VSI crusher that eject material at high speed, subject to extreme wear. Often made from high-chromium iron, cemented carbide, or ceramic composites.
Liners (Side Liners, Cheek Plates): Wear protection plates installed inside the crusher frame, on the sides of the crushing chamber, etc., to prevent wear on the housing. Available in various materials including high manganese steel, alloy wear-resistant steel, rubber, and ceramics.
Core Structural Components
Main Shaft: The core load-bearing component of the crusher, enduring immense crushing forces and torque. Forged from high-strength alloy steel, followed by quenching and tempering and precision machining to ensure strength and fatigue life.
Eccentric Shaft / Eccentric Bushing: Key components that transmit power and generate the crushing motion. The eccentric shaft is used in jaw crushers; the eccentric bushing is used in cone crushers. Forged or cast from alloy steel and precision-machined.
Frame (Housing): The foundational support structure of the crusher, bearing all crushing forces. Integrally cast from high-strength cast steel or fabricated from steel plates, requiring sufficient rigidity and strength.
Swing Jaw: The component in a jaw crusher that holds the movable jaw plate, subjected to immense crushing forces. Made from high-strength cast steel or a fabricated steel plate structure.
Rotor: The core rotating component of impact crushers and VSI crushers, holding the blow bars or distributor tips. Fabricated by welding high-strength steel plates and must undergo rigorous dynamic balancing.
Cone Head (Crushing Cone): The component in a cone crusher that holds the mantle and moves eccentrically with the main shaft. Made from high-strength cast steel.
Transmission Components
Pulleys (Flywheels): Transmit power from the motor, driving the crusher via V-belts. Made from cast iron or fabricated steel, requiring static balancing.
Couplings: Connect the motor to the crusher or gearbox, transmitting torque. Common types include elastic pin couplings and fluid couplings.
Gears: Critical components in cone crusher drive systems, including pinion gears and bevel gears, used to transmit power and change motion direction. Made from high-strength alloy steel, carburized, hardened, and precision-ground.
Bearings: Support rotating components, bearing radial and axial loads. Heavy-duty types like spherical roller bearings and cylindrical roller bearings are used, requiring regular lubrication and maintenance.
Hydraulic and Lubrication System Components
Hydraulic Cylinders: Used for discharge setting adjustment, overload protection, and clearing the cavity in hydraulic crushers. Made from high-strength steel with precision-machined internals to ensure sealing and reliability.
Hydraulic Power Packs: Provide power for the hydraulic system, including pumps, tanks, valve groups, and piping.
Lubrication Stations: Provide circulating oil lubrication for main bearings, gears, etc., including pumps, tanks, coolers, filters, and piping.
Accumulators: Store energy in hydraulic systems, absorb shocks, and maintain pressure.
Auxiliary Components
Springs: Used for overload protection and vibration damping in spring cone crushers, and for supporting vibrating screens. Made from high-elasticity alloy steel.
Toggle Plate / Tension Rod: Used for tensioning and securing jaw plates in jaw crushers.
Wedges: Mechanical devices used to adjust the discharge opening in jaw crushers.
Seals: Prevent dust from entering critical areas like bearings and hydraulic cylinders, extending equipment life. Includes labyrinth seals, lip seals, and dust covers.
Key Features of Crusher Parts
High Wear Resistance: Wear parts are manufactured from wear-resistant materials like high manganese steel, high-chromium iron, and cemented carbide, effectively resisting material abrasion and extending service life.
High Strength: Core structural components are forged or cast from high-strength alloy steel, ensuring reliability and safety under immense crushing forces.
High Precision: Critical mating surfaces (e.g., bearing seats, main shaft journals, gear teeth) are precision-machined to ensure assembly accuracy and operational smoothness.
Good Interchangeability: Manufactured according to original drawings or international standards, offering good interchangeability with major crusher brands for easy replacement and maintenance.
Optimized Structural Design: Part structures (e.g., jaw plate tooth profiles, crushing chamber curves) are optimized based on crushing principles and material characteristics to improve crushing efficiency and product shape.
Diverse Material Options: Parts in various materials and heat treatments are available for different operating conditions (material hardness, abrasiveness, moisture) to meet specific needs.
Crusher Parts Customization Options
Manufacturers often offer custom configurations based on specific equipment models and operating conditions:
Material Customization: Based on material abrasiveness, options include high manganese steel (Mn13, Mn18, Mn22), high-chromium iron, alloy wear-resistant steel, and ceramic composites.
Tooth Profile Customization: Jaw plate, blow bar, mantle, and concave tooth profiles and contours can be customized for different material characteristics and product size requirements.
Dimension Customization: Specific dimensions and mounting hole positions can be customized based on the equipment model and wear patterns.
Heat Treatment Process: Different heat treatment processes can be selected, such as water toughening, quenching and tempering, and carburizing and quenching, to achieve optimal comprehensive mechanical properties.
Carbide Inserts: For highly abrasive materials, carbide studs or bars can be embedded in critical areas like blow bars and distributor tips to significantly improve wear life.
Composite Casting: Bimetal composite casting processes can be used, giving the working layer high wear resistance and the base material high toughness.
Crusher Parts OEM Process
Original Equipment Manufacturing (OEM) for crusher parts involves material research, precision casting/forging, machining, and heat treatment.
Material Analysis & Formulation: Based on the part's working conditions and performance requirements, the chemical composition is designed and optimized to ensure the best match of wear resistance, strength, and toughness.
Casting/Forging Process: Wear parts are typically produced using sodium silicate sand casting, lost foam casting, or precision casting. Load-bearing parts like shafts and gears are forged. Melting, pouring, and forging temperatures are strictly controlled to ensure internal quality.
Heat Treatment: Castings and forgings undergo appropriate heat treatment, such as water toughening for high manganese steel, quenching and tempering for alloy steel, and carburizing and quenching for gears, to achieve the required microstructure and mechanical properties.
Precision Machining: Critical areas of the parts are precision-machined on CNC lathes, milling machines, boring machines, and grinders to ensure dimensional accuracy and surface finish meet drawing specifications.
Quality Inspection: Parts undergo chemical composition analysis, mechanical property testing, hardness testing, and non-destructive testing (ultrasonic, magnetic particle) to ensure quality compliance.
Surface Treatment & Packaging: Finished parts are surface-cleaned, rust-proofed, and properly packaged based on their characteristics to prevent damage during transit.
Crusher Parts Price
The price of crusher parts varies based on type, material, specifications, brand, and manufacturing process. Small wear parts like blow bars and jaw plates may cost from a few hundred to several thousand USD per ton. Large structural components like main shafts and frames can range from several thousand to tens of thousands of USD. Key price drivers include: material (high manganese steel, high-chromium iron, cemented carbide), weight, manufacturing process (casting/forging, heat treatment, machining precision), brand reputation, and whether it is an original or OEM replacement part.
Crusher Parts Supplier
PASCAL is a professional crusher parts supplier, with its factory established in 2017, based in Luoyang, China. The company serves as a global supplier of heavy industrial machinery, specializing in providing high-quality wear parts, structural components, and transmission parts for various crushers, including jaw crushers, cone crushers, impact crushers, and VSI crushers. PASCAL is committed to providing customers with well-matched, highly wear-resistant, and long-lasting parts to reduce operating costs and ensure the stable and efficient operation of crushing production lines.
Crusher Parts FAQ
What is high manganese steel? Why is it widely used for crusher wear parts?
High manganese steel (e.g., Mn13, Mn18) is a wear-resistant steel with work-hardening characteristics. Under strong impact or compressive loads, its surface rapidly hardens while the interior retains good toughness. This allows it to resist wear from material and withstand immense impact forces, making it ideal for manufacturing wear parts like jaw plates, mantles, and concaves.
How do I know when wear parts need replacement?
Replacement is needed when: the working surface of parts like jaw plates or blow bars wears down to the specified limit (e.g., tooth height worn flat, thickness reduced below the safety line); the crushed product size becomes noticeably coarser and cannot be improved by adjusting the discharge setting; cracks, fractures, or localized detachment appear on the wear part; crushing efficiency drops significantly, and energy consumption increases.
How to choose between original parts and OEM (aftermarket) parts?
Original parts offer guaranteed quality and perfect fit with the equipment but are typically more expensive. High-quality OEM parts from specialized manufacturers, made to original drawings or optimized designs, may use more advanced materials and processes, offering better cost performance. When choosing OEM parts, evaluate the supplier's qualifications, materials, processes, and warranty service.
How can I extend the service life of wear parts?
Select the appropriate material and tooth profile. Regularly check and maintain a reasonable crusher discharge setting. Ensure uniform feeding to avoid uneven loading. Prevent tramp iron or other uncrushable materials from entering the crushing chamber. Flip parts periodically when possible (e.g., blow bars, jaw plates). Optimize crusher operating parameters like speed and amplitude.
What are the possible causes of crusher main shaft breakage?
Possible causes include: long-term overload operation; frequent tramp iron impacts; manufacturing defects in the shaft (e.g., inclusions, cracks); loose fit between the shaft and mating components (e.g., bushing, pulley) causing impact; improper heat treatment resulting in insufficient toughness; accumulation of fatigue damage.
What are common causes and solutions for bearing overheating?
Common causes: poor lubrication (too much, too little, or degraded grease); improper bearing installation with insufficient clearance; bearing wear or damage; excessive vibration due to rotor imbalance; damaged labyrinth seals allowing dust ingress. Solutions: check and adjust lubrication; check bearing clearance and installation; replace damaged bearings; perform dynamic balancing; replace seals.
