Jaw Crusher Parts

Introduction

Jaw plate is the primary wear component of a jaw crusher. It consists of two main parts: the fixed jaw plate, which is securely mounted to the crusher frame, and the movable (swing) jaw plate, which is attached to the moving jaw . Together, these plates form the crushing chamber that processes material through a compressive, wedge-like action.

As the most critical wear parts in a jaw crusher, jaw plates are subject to extreme abrasion and impact, making their material composition and design essential to the crusher's performance, uptime, and total cost of ownership . Modern jaw plates are engineered from high-performance alloys—typically manganese steel—and are available in a variety of tooth patterns to suit specific rock types, feed characteristics, and application demands.

Function

The jaw plates perform the actual crushing work within the jaw crusher:

• Feed Entry: The raw material enters the crushing chamber from the top, between the stationary and moving jaw plates.
• Compression Crushing: The movable jaw plate moves back and forth against the fixed jaw plate. As the gap narrows, the material is progressively crushed against the fixed plate.
• Gradual Discharge: Material moves downward as it is reduced in size, eventually exiting through the gap at the bottom of the crushing chamber .

The tooth pattern and material composition of the jaw plate determine how effectively the crushing process occurs, how quickly the plates wear, and the overall efficiency of the crusher.

Applications

Jaw plates are essential components across industries that require primary or secondary crushing of hard and abrasive materials:

• Mining:Crushing hard ores (iron ore, copper ore, gold ore).
• Quarrying & Aggregates:Crushing granite, basalt, limestone, sandstone, and gravel.
• Construction & Recycling:Processing concrete, asphalt, and building waste.
• Metallurgical Industry:Preparation of raw materials for smelting and processing.
• Chemical & Silicate Industries:Crushing medium-hard minerals and raw materials.

Features

Premium Wear-Resistant Materials, Jaw plates are primarily manufactured from high-manganese steel, which offers exceptional work-hardening properties. Under impact and compression, the surface hardness increases significantly, providing extended wear life .

• Mn13Cr2 (ZGMn13Cr2):Standard applications; high impact resistance.
• Mn18Cr2 (ZGMn18Cr2):Highly abrasive rock; superior wear resistance.
• Mn22Cr2 (ZGMn22Cr2):Heavy-duty, extreme abrasion applications
• Cr26:High-chrome alloy for specialised conditions.
• Typical hardness: HB 180–225.

Optimised Tooth Patterns

Leading manufacturers offer multiple tooth profiles to match specific crushing requirements :

• Wide Teeth (WT):Broad, widely-spaced teeth,Large feed, high-capacity crushing.
• Corrugated (C):Wavy profile with moderate spacing,Versatile, all-purpose crushing.
• Coarse Corrugated (CC):Deep, coarse wave pattern,Hard rock, abrasive applications.
• Heavy Duty (HD):Extra-thick, robust teeth,Heavy-duty mining and quarrying.
• Sharp Teeth (ST):Aggressive, pointed teeth,Soft to medium rock
• HD Ultra-Thick (UT)    Maximum thickness for extreme life,Severe wear applications.

Superior Alloy Options

Material selection is critical to wear life and cost efficiency. Alloys typically include :

• M1 (Standard Alloy): High resistance to shock and impact; excellent work-hardening with hard rock.
• M8 / M9 (Premium Alloy): Superior resistance to abrasive rock; lower shock resistance.

Compatibility & Customisation

Jaw plates are available for a comprehensive range of OEM crusher brands, including:
Sandvik, Metso, Terex, Extec, Pegson, Hazemag, Nordberg, Svedala, Krupp, Kue Ken, and many Chinese brands (Metro, Sanbao, Jianshe, Mingyu, etc.) .

We offer OEM replacements and custom-made parts to your drawings.

Selection Factors

The optimal jaw plate selection is based on:

• Rock/ore characteristics (Work Index, Abrasion Index)
• Feed characteristics (friction, gradation)
• Desired throughput and product size
• Shock vs. abrasion balance

Why Choose Our Jaw Plates?

Our jaw plates combine advanced metallurgy, precision casting, and rigorous quality control to deliver superior wear life, reliable fit, and optimised crushing performance.

Key differentiators:

• High-quality manganese steel (Mn13, Mn18, Mn22 options) with double-times hardening technology for up to 30% longer service life
• Precision casting ensures accurate dimensions and easy fit with minimal downtime.
• Customisable designs: tooth patterns, materials, and dimensions tailored to your crusher model and application.
• Cost-effective solutions: direct supply from foundry ensures competitive pricing.
• Comprehensive support: technical sizing, installation guidance, and aftermarket spares availability.

Contact our engineering team today to specify the right jaw plates for your crusher and application.