INDUSTRY COMPONENT

Movable Jaw Plate

Movable jaw plate is the replaceable crushing surface in jaw crushers that moves against the fixed jaw to compress and break materials.

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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.

movable jaw plate jaw crusher parts crushing plate wear parts manganese steel jaw plate crusher replacement parts mining equipment components Movable 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
  • 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

Interchangeable Parts

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

Buyer Feedback

★★★★☆ 4.7 / 5.0 (34 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Movable Jaw Plate meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Movable Jaw Plate arrived with full certification."

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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.

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Movable Jaw Movement (Linkage & Gear)