Structured Manufacturing Data (2026)

Eccentric Assembly

Based on aggregated insights from structured 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 Part
    Creates the offset rotation that generates the crushing motion
    Material: Bronze or Bronze Alloy
  • Main Shaft Part
    Transmits rotational force and supports the mantle
    Material: Alloy Steel
  • Eccentric Sleeve Part
    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

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 Structure

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

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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

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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

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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