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Friction plates Component – Motor Vehicle Manufacturing

Component Specifications

Definition

Friction plates are disc-shaped components within clutch assemblies that create controlled frictional engagement between rotating members. They consist of a steel core plate with bonded friction material on one or both surfaces, designed to withstand high thermal and mechanical loads during engagement cycles. These plates alternate with separator plates in clutch packs to transmit torque when compressed by hydraulic or mechanical pressure.

Working Principle

Friction plates operate on the principle of dry or wet friction engagement. When hydraulic pressure or mechanical force compresses the clutch pack, friction surfaces contact separator plates, creating torque transfer through frictional resistance. The friction material's coefficient of friction determines engagement characteristics, while grooves in the material facilitate fluid flow and heat dissipation in wet clutch applications.

Materials

Steel core (SAE 1010-1020) with bonded friction material (paper-based, carbon, sintered bronze, or ceramic composites). Friction material thickness: 0.8-2.0mm. Core plate thickness: 1.5-3.0mm with heat treatment to 45-50 HRC.

Technical Parameters

Thickness 2.0-5.0mm
Inner Diameter 50-200mm
Outer Diameter 80-300mm
Pressure Rating 1.5-4.0 MPa
Maximum Temperature 250-350°C
Friction Coefficient 0.10-0.15 (wet), 0.30-0.45 (dry)

Standards

ISO 15407, DIN 15407, SAE J2489

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Friction plates.

Parent Products

This component is used in the following industrial products

Clutch Pack

A multi-plate friction assembly within an automatic transmission that engages and disengages power flow between rotating components.

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Engineering Analysis

Risks & Mitigation

Thermal degradation of friction material
Glazing from overheating
Delamination of bonded material
Warpage from uneven heating
Contamination from fluid breakdown

FMEA Triads

Trigger: Insufficient cooling fluid flow
Failure: Thermal cracking and material degradation
Mitigation: Implement temperature sensors and flow monitoring; optimize groove design for better fluid distribution

Trigger: Excessive clutch engagement pressure
Failure: Plate warpage and premature wear
Mitigation: Calibrate hydraulic pressure controls; install pressure relief valves; use reinforced core plates

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.05mm thickness, ±0.1mm diameter, flatness within 0.03mm

Test Method

SAE J2489 friction testing, ISO 15407 thermal cycling, DIN 15407 wear resistance testing

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

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 difference between wet and dry friction plates?

Wet friction plates operate in oil for cooling and lubrication, typically using paper-based materials. Dry friction plates operate without fluid, using higher-friction materials like ceramics or organics, generating more heat but providing direct engagement.

How do friction plate grooves affect performance?

Grooves facilitate fluid flow for cooling and debris removal in wet clutches, prevent hydroplaning, and provide consistent engagement by maintaining oil film control. Pattern design affects engagement smoothness and heat dissipation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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.

Friction plates