Industry-Verified Manufacturing Data (2026)

Eccentric Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Eccentric Assembly used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Eccentric Assembly is characterized by the integration of Eccentric Bushing and Main Shaft. In industrial production environments, manufacturers listed on CNFX commonly emphasize Alloy Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The rotating mechanism that generates the crushing motion in a cone crusher

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Product Specifications

Technical details and manufacturing context for Eccentric Assembly

Definition
The eccentric assembly is a critical rotating component in a cone crusher that converts the rotational motion from the drive system into the gyratory crushing motion. It consists of an eccentric bushing, main shaft, and related components that create the oscillating movement of the mantle against the concave, enabling the crushing of rocks and minerals.
Working Principle
The eccentric assembly rotates around a fixed point, causing the main shaft and mantle to gyrate in an elliptical path. This motion creates the crushing action as the mantle moves toward and away from the concave liner, compressing and breaking down the material fed into the crusher chamber.
Common Materials
Alloy Steel
Technical Parameters
  • Eccentric throw distance - determines the stroke length of the crushing motion (mm) Customizable
Components / BOM
  • Eccentric Bushing
    Creates the offset rotation that generates the crushing motion
    Material: Bronze or Bronze Alloy
  • Main Shaft
    Transmits rotational force and supports the mantle
    Material: Alloy Steel
  • Eccentric Sleeve
    Houses the eccentric bushing and connects to the drive system
    Material: Cast Steel
  • Thrust Bearing
    Supports axial loads from the crushing forces
    Material: Steel with Bronze or Babbitt Lining
Engineering Reasoning
0.1-0.5 mm eccentric throw at 300-1200 rpm, generating 50-250 kN crushing force
Eccentric bushing wear exceeding 0.8 mm clearance or main shaft deflection >0.15 mm at 100 kN load
Design Rationale: Hertzian contact stress exceeding 800 MPa at eccentric bushing-shaft interface causes adhesive wear and fatigue spalling
Risk Mitigation (FMEA)
Trigger Insufficient lubrication film thickness <5 μm at eccentric bushing interface
Mode: Boundary lubrication leading to adhesive wear and seizure
Strategy: Forced lubrication system with 0.3 MPa pressure and 40 μm filtration
Trigger Cyclic bending stress exceeding 350 MPa at main shaft fillet radius
Mode: Fatigue crack initiation at stress concentration points
Strategy: Shaft design with 5 mm minimum fillet radius and shot peening to induce 400 MPa compressive residual stress

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Eccentric Assembly.

Eccentric Mechanism Eccentric Drive Assembly cone crusher eccentric assembly alloy steel eccentric bushing eccentric sleeve replacement parts main shaft thrust bearing assembly industrial crusher rotating mechanism

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Cone Crusher
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Max 50 MPa dynamic load
other spec: Slurry concentration up to 70% solids by weight, rotational speed 200-800 RPM
temperature: -20°C to 120°C
Media Compatibility
✓ Hard rock crushing (granite, basalt) ✓ Iron ore processing ✓ Recycled concrete aggregates
Unsuitable: Highly corrosive chemical slurries with pH <4 or >10
Sizing Data Required
  • Feed material hardness (Bond Work Index)
  • Required throughput capacity (tons/hour)
  • Desired product size distribution (P80)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Eccentricity loss
Cause: Wear in bearing surfaces or eccentric adjustment mechanisms due to improper lubrication, misalignment, or cyclic loading beyond design limits.
Fatigue cracking
Cause: Stress concentration at keyways, bolt holes, or transitions in geometry from repeated torsional and bending loads, often exacerbated by material defects or improper heat treatment.
Maintenance Indicators
  • Excessive vibration or audible knocking during operation, indicating imbalance or bearing wear.
  • Visible misalignment or wobble in connected components, suggesting eccentricity deviation or structural looseness.
Engineering Tips
  • Implement precision laser alignment during installation and periodic checks to ensure optimal eccentric positioning and reduce dynamic stresses.
  • Use condition-based monitoring with vibration analysis and thermal imaging to detect early wear trends and schedule proactive maintenance before failure.

Compliance & Manufacturing Standards

Reference Standards
ISO 286-2:2010 (Limits and fits) ANSI B4.2-1978 (Preferred metric limits and fits) DIN 7184-1 (Tolerances for linear and angular dimensions)
Manufacturing Precision
  • Bore diameter: +/-0.01mm
  • Eccentricity offset: +/-0.02mm
Quality Inspection
  • Coordinate Measuring Machine (CMM) verification
  • Hardness testing (e.g., Rockwell C scale)

Factories Producing Eccentric Assembly

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Feb 05, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Eccentric Assembly meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from Canada Feb 02, 2026
★★★★☆
"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Eccentric Assembly arrived with full certification. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Jan 30, 2026
★★★★★
"Great transparency on the Eccentric Assembly components. Essential for our Machinery and Equipment Manufacturing supply chain."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Eccentric Assembly from India (1h ago).

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Frequently Asked Questions

What is the primary function of an eccentric assembly in cone crushers?

The eccentric assembly generates the gyrating crushing motion in cone crushers by rotating eccentrically around the main shaft, creating the compressive force needed to crush materials.

Why is alloy steel used for eccentric assembly components?

Alloy steel provides exceptional strength, wear resistance, and durability to withstand the high stress, abrasion, and impact forces experienced during crushing operations.

How often should eccentric assembly components be inspected or replaced?

Regular inspection should occur during routine maintenance (typically every 500-1000 operating hours), with replacement needed when wear exceeds manufacturer specifications or performance declines.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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