Movable Jaw Plate: Tooth Height 20-80 mm, Thickness 50-200 mm

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

Parameter	Typical range	Notes & selection driver
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)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 21873-1, DIN 22101

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)

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Movable Jaw Plate

Manufacturer profiles associated with Movable Jaw Plate.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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