GRT‑606 Aramid High‑Performance Clutch Facing Key Points

Product: Asbestos‑free aramid organic friction clutch facing. The slotted structure shown in the picture is radial heat‑dissipation slots. Designed for dry‑type clutch assemblies, suitable for heavy‑duty trucks, construction machinery and modified high‑performance vehicles.

1. Core Materials

Main reinforcing fiber: Aramid fiber (Kevlar). It replaces traditional asbestos fiber as an eco‑friendly asbestos‑free friction material. Composited and hot‑pressed with cashew nut shell oil friction powder, modified phenolic resin, functional fillers and thermal‑conductive components.

Characteristics of aramid fiber: High tensile strength, high temperature resistance and creep resistance. Fibers resist pulverization and fracture under high temperatures. A 5% aramid loading achieves the same reinforcing effect as 20% asbestos, fully eliminating carcinogenic risks of asbestos.

Manufacturing process: Yarn weaving plus hot‑press curing. The woven texture on the product surface is the interwoven structure of aramid yarns.

2. Key Friction‑Performance Parameters

Friction coefficient range: 0.30‑0.40. The difference between dynamic and static friction coefficient is less than 10%, delivering smooth clutch engagement with minimal shifting shock and jolt.

Heat resistance: Long‑term operating temperature reaches 220‑250 ℃ with high short‑term peak temperature tolerance. It features far superior heat‑fade resistance compared with conventional asbestos‑free facings. Friction coefficient remains stable under frequent half‑clutch and heavy‑load slipping conditions.

Low creep property: Thanks to aramid's low‑creep feature, the facing resists plastic deformation under long‑term high‑temperature compression and maintains stable thickness.

3. Appearance & Structure (Visual Identification)

Radial split slots (heat‑dissipation slots): The circumferential grooves in the image serve three major functions:

Boost air convection for heat dissipation and remove heat generated by clutch slipping.

Expel friction wear debris to prevent slipping caused by debris accumulation.

Improve flexibility of the facing for better engagement cushioning and reduced shudder.

Annular ring‑shaped structure: Both sides are friction working surfaces. It is riveted onto the clutch steel disc for dry friction application. Oil immersion is strictly prohibited; oil contamination will directly cause slipping failure.

Surface woven texture: Uniform interwoven aramid yarn texture, which differentiates it from ordinary short‑fiber moulded facings.

4. Core Product Advantages

✅ Smooth engagement: Close dynamic‑static friction coefficients ensure soft start‑up and gear shifting, low impact and low noise.

✅ High‑temperature & anti‑heat‑fade performance: Minimal friction‑performance degradation under heavy‑load, frequent half‑clutch and mountain‑road conditions; low risk of clutch burnout.

✅ High wear resistance & long service life: The aramid‑fiber skeleton delivers excellent wear resistance. Service life is extended by 30‑60 % versus standard organic facings under equivalent working conditions.

✅ Friendly to mating components: Causes little wear on flywheels and pressure plates, unlike semi‑metallic sintered facings which tend to abrade steel mating parts.

✅ Eco‑friendly & safe: Asbestos‑free, generates no hazardous dust.

⚠️ Limitations: Ultimate peak torque is inferior to copper‑based sintered facings. Not fit for extreme motor‑sport scenarios with sustained heavy slipping. Higher cost than regular semi‑metallic and asbestos‑free facings.

5. Application Scenarios

Dry‑type clutches for heavy‑duty trucks, high‑power light trucks, construction machinery, forklifts and agricultural machinery.

High‑power modified passenger vehicles, operating under heavy‑load, mountain‑road and frequent half‑clutch conditions.

Ideal for customers prioritizing smooth operation, durability and protection for flywheels and pressure plates.

❌ Not applicable: Oil‑immersed wet‑type clutches; racing applications requiring long‑duration extreme slipping.

6. Installation & Operation Precautions

Strictly avoid contamination by engine oil or gear oil; oil contamination will directly trigger friction‑slipping failure.

Excessive riveting force shall be avoided during riveting to prevent cracking and deformation of the facing.

Run‑in procedure for new facings: Avoid prolonged half‑clutch operation to gradually build up proper friction contact surfaces.

Severely grooved or worn flywheels / pressure plates must be repaired in advance; otherwise the service life of clutch facings will be drastically shortened.

7. Comparison with Conventional Clutch Facings

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