Editorial Technical Reference

Eccentric Assembly

This page explains how Eccentric Assembly is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

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.

View Full Specifications Explore Manufacturing Sources

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. The assembly is typically made of high-strength alloy steel, such as 42CrMo4, to withstand heavy loads and wear. It operates within a specified range of rated power (75–250 kW), eccentric throw (15–60 mm), and rotational speed (200–400 r/min), which are selected based on the crusher model and application. The bearing tolerance is typically ISO 492 P6, ensuring smooth operation. The assembly is designed to operate within a temperature range of -20 to 80 °C and requires a lubrication flow rate of 25–100 L/min to prevent overheating and failure. The weight varies from 1500 to 8000 kg, depending on the crusher size. The IP rating (IP54–IP65) protects against dust and water ingress in harsh environments. The noise level is typically 75–95 dB(A), which may indicate vibration or wear if higher. These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The eccentric assembly is a key component that directly affects crusher performance, product size, and liner life. Proper maintenance, including regular inspection of the eccentric bushing and bearings, is essential to ensure reliable operation and prevent costly downtime.
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. The eccentric throw determines the stroke length, which affects capacity and product size. The rotational speed influences throughput and liner wear. The assembly is driven by the crusher's drive system, and its motion is guided by precision bearings. Proper lubrication is critical to reduce friction and heat, ensuring smooth operation and preventing premature wear.
Common Materials
Alloy Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Power75–250 kWDrives the eccentric assembly; higher power for larger crushers.
Eccentric Throw15–60 mmDetermines crushing stroke; affects capacity and product size.
Rotational Speed200–400 r/minHigher speed increases throughput but may reduce liner life.
Bearing ToleranceP6 ISO 492Precision grade for main bearings; ensures smooth operation.ISO 492
Operating Temperature-20–80 °CExceeding range may cause lubricant failure or thermal expansion.
Lubrication Flow Rate25–100 L/minInsufficient flow leads to bearing overheating and failure.
Material Grade42CrMo4 DIN 17200High-strength alloy steel for shaft and gears.DIN 17200
Weight1500–8000 kgVaries with crusher model; affects installation and handling.
IP RatingIP54–IP65 IPProtects against dust and water ingress in harsh environments.IEC 60529
Noise Level75–95 dB(A)Higher noise indicates vibration or wear; may require mitigation.ISO 3744

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

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

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.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 286-2:2010 (Limits and fits) ANSI B4.2-1978 (Preferred metric limits and fits)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.01mm
  • Eccentricity offset: +/-0.02mm
Quality Inspection
  • Coordinate Measuring Machine (CMM) verification
  • Hardness testing (e.g., Rockwell C scale)

Manufacturers of Eccentric Assembly

Manufacturer profiles associated with Eccentric Assembly.

Sourcing Eccentric Assembly from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

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

Share this page

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 · Page last updated 6 September 2026

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
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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

Supply Chain Compatible Machinery & Devices

Hydraulic Press

Industrial machine using hydraulic pressure to compress, form, or assemble materials

Explore Specs →
Heavy-Duty CNC Plasma Cutting Machine

The Heavy-Duty CNC Plasma Cutting Machine is a standalone industrial device designed for cutting conductive metals such as steel, stainless steel, aluminum, and copper alloys.

Explore Specs →
Automated Powder Coating System

Integrated industrial system for applying dry powder coatings to metal substrates.

Explore Specs →
Centrifugal Pump Impeller

The centrifugal pump impeller is a critical rotating component that converts mechanical energy from the motor into kinetic energy in fluid systems.

Explore Specs →

Frequently Asked Questions

What is the function of the eccentric assembly in a cone crusher?

The eccentric assembly converts the rotational motion from the drive system into the gyratory motion of the mantle, which crushes rocks against the concave. It is a critical component that determines the crushing stroke and overall performance.

What materials are commonly used for the eccentric assembly?

The eccentric assembly is typically made of high-strength alloy steel, such as 42CrMo4, to withstand heavy loads and wear. The material grade should be verified with the manufacturer for the specific model.

What are the key parameters to consider when selecting an eccentric assembly?

Key parameters include rated power, eccentric throw, rotational speed, bearing tolerance, operating temperature, lubrication flow rate, weight, IP rating, and noise level. These values are reference ranges and must be confirmed for the actual application.

How should the eccentric assembly be maintained?

Regular inspection of the eccentric bushing, bearings, and lubrication system is essential. Ensure proper lubrication flow and monitor operating temperature and noise levels to detect early signs of wear or failure. Always follow the manufacturer's maintenance guidelines.

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

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.
Buyer enquiry

Request manufacturing insight for Eccentric Assembly

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes
Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here
We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman
CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim
A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at [email protected].

Need to Manufacture Eccentric Assembly?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
Dust Extraction System
Next Product
Eccentric Shaft
Get QuotesChat