Industry-Verified Manufacturing Data (2026)

Release Bearing

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Release Bearing used in the Motor Vehicle Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Release Bearing is characterized by the integration of Inner Race and Outer Race. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-carbon chromium steel (e.g., GCr15) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A bearing that disengages the clutch by moving the pressure plate away from the friction disc.

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Product Specifications

Technical details and manufacturing context for Release Bearing

Definition
The release bearing is a critical component within the clutch assembly that facilitates the disengagement of the clutch. It is mounted on the clutch fork and, when actuated, presses against the diaphragm spring or release levers of the pressure plate. This action moves the pressure plate away from the clutch disc (friction disc), interrupting the power transmission from the engine to the transmission, allowing for gear changes.
Working Principle
The release bearing is a thrust bearing. When the clutch pedal is depressed, hydraulic or cable force moves the clutch fork, which pushes the release bearing forward against the rotating pressure plate assembly. The bearing's inner race rotates with the pressure plate while its outer race is pushed by the stationary fork, allowing it to apply axial force to disengage the clutch with minimal friction.
Common Materials
High-carbon chromium steel (e.g., GCr15), Polyamide (for cage/retainer), Synthetic grease
Technical Parameters
  • Bore diameter, outer diameter, and width/thickness are critical for fitment and load capacity. (mm) Customizable
Components / BOM
  • Inner Race
    The rotating ring that contacts the pressure plate's release fingers or diaphragm spring. It is often integrated with a contact surface or collar.
    Material: Hardened high-carbon chromium steel
  • Outer Race
    The stationary ring that is pressed by the clutch fork. It houses the rolling elements.
    Material: Hardened high-carbon chromium steel
  • Rolling Elements (Balls)
    Reduce friction between the inner and outer races, allowing the inner race to rotate while axial force is applied.
    Material: Hardened high-carbon chromium steel
  • Cage/Retainer
    Maintains even spacing and prevents contact between the rolling elements.
    Material: Steel stamping or polyamide (plastic)
  • Seal
    Retains lubricating grease and excludes contaminants like dirt and moisture.
    Material: Synthetic rubber (e.g., NBR)
Engineering Reasoning
0.5-2.5 kN axial load, -40°C to 120°C temperature, 1000-5000 rpm rotational speed
Axial load > 3.0 kN causes permanent deformation of bearing cage, temperature > 150°C degrades lubricant viscosity below 10 cSt, rotational speed > 6000 rpm induces centrifugal forces exceeding 50 MPa on bearing elements
Design Rationale: Hertzian contact stress exceeding 1.5 GPa causes subsurface fatigue cracks in bearing races, thermal expansion mismatch between steel (α=11×10⁻⁶/°C) and polymer cage (α=80×10⁻⁶/°C) creates interference fits > 50 μm at temperature extremes
Risk Mitigation (FMEA)
Trigger Insufficient lubricant film thickness < 0.1 μm due to high temperature operation
Mode: Metal-to-metal contact between rolling elements and races causing adhesive wear
Strategy: Implement forced lubrication system with 0.2 MPa minimum pressure and temperature-controlled oil circulation
Trigger Misalignment > 0.05° between bearing axis and clutch shaft
Mode: Edge loading on bearing races creating localized stress concentrations > 2.0 GPa
Strategy: Integrate self-aligning spherical roller bearing design with ±2° angular misalignment capability

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Release Bearing.

clutch release bearing replacement motor vehicle clutch bearing high-carbon steel release bearing automotive clutch disengagement bearing polyamide cage release bearing

Applied To / Applications

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

Clutch Assembly
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 MPa (100 bar)
other spec: Axial load capacity: 2-15 kN, Speed: Up to 6000 rpm
temperature: -40°C to 150°C
Media Compatibility
✓ Automotive transmission fluid (ATF) ✓ Synthetic lubricants ✓ Dry operation with minimal dust
Unsuitable: Abrasive slurry or high particulate environments
Sizing Data Required
  • Clutch actuation force (N)
  • Clutch release travel distance (mm)
  • Shaft diameter and mounting configuration

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing Cage Fracture
Cause: Excessive axial load or shock loading from improper clutch engagement, causing cage fatigue and eventual breakage.
Bearing Race Spalling
Cause: Contamination ingress (dirt, debris) or inadequate lubrication leading to surface fatigue and material flaking.
Maintenance Indicators
  • Grinding or scraping noise during clutch disengagement
  • Excessive clutch pedal free play or inconsistent release feel
Engineering Tips
  • Ensure proper clutch alignment during installation to prevent axial misloading on the bearing
  • Implement regular lubrication checks using manufacturer-specified high-temperature grease to prevent dry operation

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) ANSI/ABMA 9 (Load Ratings and Fatigue Life for Ball Bearings) DIN 5412-1 (Tolerances for Rolling Bearings)
Manufacturing Precision
  • Bore Diameter: +/-0.01mm
  • Radial Runout: 0.05mm max
Quality Inspection
  • Hardness Testing (Rockwell C Scale)
  • Dimensional Verification with CMM

Factories Producing Release Bearing

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

S Sourcing Manager from United Arab Emirates Mar 01, 2026
★★★★★
"As a professional in the Motor Vehicle Manufacturing sector, I confirm this Release Bearing meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from Australia Feb 26, 2026
★★★★☆
"Standard OEM quality for Motor Vehicle Manufacturing applications. The Release Bearing arrived with full certification. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Singapore Feb 23, 2026
★★★★★
"Great transparency on the Release Bearing components. Essential for our Motor Vehicle 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.”

8 sourcing managers are analyzing this specification now. Last inquiry for Release Bearing from Poland (51m ago).

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Frequently Asked Questions

What is the primary function of a release bearing in motor vehicles?

The release bearing disengages the clutch by moving the pressure plate away from the friction disc, allowing smooth gear changes and preventing transmission damage.

What materials are used in this release bearing for durability?

This bearing uses high-carbon chromium steel (GCr15) for races and balls, polyamide for the cage/retainer, and synthetic grease for lubrication, ensuring long service life.

How do I know when my vehicle's release bearing needs replacement?

Common signs include clutch pedal vibration, grinding noises when engaging/disengaging the clutch, difficulty shifting gears, or visible wear on bearing components.

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 Motor Vehicle Manufacturing sector.

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