INDUSTRY COMPONENT

Fixed Jaw Plate

Stationary crushing surface in jaw crushers that processes materials through compressive force.

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Component Specifications

Definition
The Fixed Jaw Plate is a critical wear component in jaw crushers, mounted on the stationary frame opposite the moving jaw. It forms one side of the crushing chamber where raw materials like rocks, ores, and aggregates are compressed against the moving jaw plate. Its stationary position provides the reaction surface for the oscillating motion of the movable jaw, creating the compressive force needed for size reduction. The plate's geometry, tooth profile, and material composition directly influence crushing efficiency, product gradation, and wear resistance.
Working Principle
Works on the principle of compressive crushing. As the movable jaw plate oscillates toward the fixed jaw plate, material fed into the crushing chamber is trapped and compressed between the two surfaces. The fixed jaw remains stationary, providing a reaction surface that enables the generation of high compressive forces (typically 100-350 MPa) to fracture brittle materials through mechanical stress exceeding their compressive strength.
Materials
High manganese steel (Mn13, Mn18Cr2), alloy steel with chromium carbide overlay, or martensitic steel. Typical specifications: ASTM A128 Grade B-2 (11-14% Mn), DIN 1.3401, or wear-resistant steel plates like Hardox 400/500 with Brinell hardness 400-500 HB.
Technical Parameters
  • Height 500-1500 mm
  • Length 800-2500 mm
  • Weight 200-2000 kg
  • Thickness 50-200 mm
  • Service Life 300-2000 operating hours depending on material abrasiveness
  • Tooth Profile Corrugated, smooth, or sharp teeth
  • Mounting Method Bolted or wedged to crusher frame
Standards
ISO 21873-1, DIN 22101, ASTM A128

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Fixed Jaw Plate.

fixed jaw plate jaw crusher parts stationary jaw crushing plate wear parts manganese steel jaw plate crusher components mining equipment parts Fixed Jaw Plate in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Jaw Crusher

A primary crushing machine that reduces large rocks into smaller particles using compressive force between two jaw plates.

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Engineering Analysis

Risks & Mitigation
  • Wear and tear from abrasive materials
  • Fatigue cracking from cyclic loading
  • Improper installation causing misalignment
  • Material hardening reducing impact absorption
FMEA Triads
Trigger: Abrasive material flow
Failure: Excessive wear reducing crushing efficiency
Mitigation: Use higher grade manganese steel or apply hardfacing; implement regular wear monitoring
Trigger: Cyclic compressive loading
Failure: Fatigue cracks and plate fracture
Mitigation: Proper material selection with adequate toughness; implement NDT inspection protocols
Trigger: Improper installation/tightening
Failure: Plate loosening and catastrophic failure
Mitigation: Follow manufacturer torque specifications; use locking compounds; implement installation checklists

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±1.5 mm on mounting surfaces, ±2 mm on overall dimensions
Test Method
Ultrasonic thickness testing for wear monitoring, magnetic particle inspection for crack detection, hardness testing per ASTM E10

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

How often should fixed jaw plates be replaced?

Replacement intervals depend on material abrasiveness and throughput. Typically every 300-2000 operating hours. Monitor wear patterns and replace when wear exceeds 30-40% of original thickness or when crushing efficiency drops significantly.

Can fixed jaw plates be reversed for extended life?

Yes, many designs allow rotation or reversal when the bottom section wears faster than the top. This doubles service life by utilizing both ends of the wear surface before replacement.

What causes premature wear on fixed jaw plates?

Common causes include improper material feed (oversize or tramp metal), incorrect plate material for the application, excessive crushing force, poor alignment with moving jaw, and abrasive materials without proper material selection.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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Fixed Jaw Fixture Base Plate