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Movable Jaw Plate Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

The movable jaw plate is a critical wear component in jaw crushers, mounted on the swing jaw assembly. It forms the crushing chamber with the fixed jaw plate and moves in an elliptical motion to apply compressive force on feed material. Its geometry, tooth profile, and material composition directly influence crushing efficiency, product gradation, and operational costs. Designed for periodic replacement due to abrasive wear, it features mounting holes for secure attachment and may incorporate reversible designs to extend service life.

Working Principle

The movable jaw plate operates on the principle of compressive crushing. As the eccentric shaft rotates, it drives the swing jaw in a reciprocating elliptical motion. This movement brings the movable jaw plate periodically toward the fixed jaw plate, creating a narrowing gap that compresses trapped material until it fractures. The crushed material then falls through the discharge opening at the bottom during the retraction phase. The crushing action is primarily determined by the plate's tooth profile, which can be straight, corrugated, or toothed to optimize for different material types and desired product sizes.

Materials

High manganese steel (Mn13, Mn18Cr2), alloy steel with chromium (Cr) and molybdenum (Mo) additions, or composite materials with ceramic inserts. Typical specifications include ASTM A128 Grade B3/B4, DIN 1.3401, or equivalent wear-resistant steel grades with hardness ranging from 200-400 HB and impact toughness exceeding 100 J/cm².

Technical Parameters

Weight 100-2000 kg
Thickness 50-200 mm
Service Life 200-1000 operating hours depending on material abrasiveness
Tooth Height 20-80 mm
Mounting Hole Pattern Standardized (e.g., 4-8 holes)

Standards

ISO 21873-1, DIN 22101

Industry Taxonomies & Aliases

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

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

Premature wear from improper material selection
Fatigue cracking due to cyclic loading
Improper mounting causing plate detachment
Reduced crushing efficiency from worn profiles

FMEA Triads

Trigger: Abrasive wear from hard feed materials
Failure: Reduced crushing capacity and poor product size distribution
Mitigation: Use wear-resistant materials, implement regular inspection schedules, optimize feed size distribution

Trigger: Fatigue stress from cyclic compressive loads
Failure: Crack propagation and catastrophic plate fracture
Mitigation: Design with proper radius transitions, use materials with high impact toughness, avoid over-tightening mounting bolts

Trigger: Corrosion in wet processing environments
Failure: Accelerated wear and pitting corrosion
Mitigation: Apply protective coatings, use corrosion-resistant alloys, ensure proper drainage in crushing chamber

Industrial Ecosystem

Compatible With

Jaw Crushers (e.g., Metso C Series, Sandvik CJ, Terex Jaques)

Interchangeable Parts

Metso, Sandvik, Terex, Kleemann, McCloskey

Compliance & Inspection

Tolerance

±1.5 mm on critical dimensions, surface flatness within 0.2 mm/m

Test Method

Dimensional inspection per ISO 2768-m, hardness testing per ASTM E10, non-destructive testing (UT/MT) per ASTM E709

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 movable jaw plates be replaced?

Replacement frequency depends on material abrasiveness, feed size, and crusher settings. Typically, plates last 200-1000 hours. Monitor for reduced throughput, increased power consumption, or poor product gradation as replacement indicators.

Can movable jaw plates be reversed to extend life?

Yes, many designs are reversible. When the crushing surface wears, the plate can be flipped 180 degrees to utilize the opposite edge, effectively doubling service life before replacement.

What materials are best for crushing abrasive rocks?

High manganese steel (Mn18Cr2) or chromium-alloyed steels offer optimal wear resistance for highly abrasive materials like granite or basalt. Composite plates with ceramic inserts provide superior performance in extreme conditions.

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.

Movable Jaw Plate