E-car Heavy Duty Grey Hat Brake Discs

Brake Discs Features:                                                   

Ventilated brake discs represent the definitive engineering solution for modern front-wheel braking systems. Their specialized dual-layer construction incorporates internal vanes that create a centrifugal pumping action, actively dissipating thermal energy generated during braking. This advanced thermal management system provides exceptional resistance to brake fade and maintains consistent performance under sustained braking conditions. By effectively balancing superior stopping power with long-term structural durability and practical usability, these discs deliver reliable performance that instills confidence across diverse driving scenarios, from extended highway journeys to demanding urban environments.

Core Product Features

1. Multiple high‑grade cast‑iron material grades for diversified market requirements

   Available in Gray Iron, High‑Carbon, G3000, GG15HC, DIN, SAE standard cast iron. Different material formulas adapt to passenger cars, SUVs and light commercial vehicles. High‑carbon cast‑iron options deliver excellent heat dissipation, anti‑warp performance and stable friction matching with various brake pads.

2. Full‑set global authoritative certifications

   Qualified with IATF‑16949, ISO14001, ISO45001, ECE R90 and AMECA. Strict third‑party laboratory tests verify thermal stability, anti‑crack performance, dimensional tolerance and braking safety. Satisfy legal aftermarket replacement requirements for worldwide markets.

3. Precision turning & grinding machining process

   Complete turning and double‑sided grinding manufacturing. Strictly control flatness, run‑out and thickness tolerance. Minimize brake judder, vibration and noise during braking. Ensure perfect fitment with original calipers and wheel hubs.

4. Diversified anti‑rust treatment options

   Multiple anti‑rust solutions: oiled, painted, coated, zinc dust treatment. Effectively resist oxidation and surface rust during sea freight, long‑term warehouse storage and humid working environment. Meet different customers’ anti‑rust and appearance demands.

5. Rich surface appearance choices

   Support gray, black, metal original colour, gold surface finish. Suitable for OE replacement and high‑demand aftermarket retail business. Match different vehicle styling and customer aesthetic preferences.

6. Stable thermal dissipation & anti‑distortion performance

   Optimized internal ventilation vane structure for vented brake rotors. Fast heat dissipation under frequent braking and downhill conditions. Reduce thermal deformation, hot‑spot and cracking risks to extend service life.

7. Strict OE‑equivalent dimensional compliance

   Follow OE drawing standards for hub hole, bolt hole, thickness and overall dimension. Direct replacement without modification, guarantee assembly compatibility for various vehicle models.

Material, Casting, Machining & Packaging

Material

‑ Main raw material: Gray Iron / High‑Carbon cast iron, including G3000, GG15HC, DIN, SAE grade cast iron. Stable metallographic structure, good damping capacity, outstanding wear resistance and thermal conductivity. Reduce brake squeal and thermal cracking risk. 

‑ Anti‑rust treatment: Optional oiled, painted, coating, zinc dust process for surface corrosion protection.

 ‑ Surface colour options: Gray, black, metal natural finish, gold.

Casting Process

1. Melting & ingredient adjustment: Raw iron material is melted in furnace, chemical composition adjusted strictly to meet target grade standard.

2. Mould casting: Adopt precision casting process to form brake disc blank. Control internal casting quality, avoid shrinkage cavity, porosity and other casting defects.

3. Heat treatment: Stress relief annealing to eliminate internal casting stress, greatly lower deformation risk in later service.

4. Blank inspection: Visual and ultrasonic inspection to reject defective cast blanks before machining.

Machining Process

1. Turning: Rough‑turning and finish‑turning for disc blank, process hub mounting face, outer diameter and inner structure.

2. Grinding: Double‑side surface grinding to guarantee parallelism, flatness and thickness tolerance.

3. Drilling: Precision machining of bolt holes, positioning holes according to OE specifications.

4. Surface anti‑rust treatment: Oiling / painting / coating / zinc dust as customer selection.

5. Quality inspection: Run‑out test, dimension measuring, visual appearance inspection. Sample lab test for certification requirement.

Packaging

‑ Inner package: Protective film wrapping, separate protective cover to prevent scratch and collision. 

‑ Retail box: Custom box supporting private label and customized label printing. Mark OE number, part info and vehicle application. 

‑ Outer shipment packing: Box, carton, pallet or bulk packing optional. Export‑grade heavy‑duty carton and pallet packaging. Fit long‑distance sea freight, container storage and mixed full‑container loading, prevent damage in transit.

• 100% critical dimensions, runout and DTV inspection 

• Material physical and chemical inspection

• Test shear strength, compressibility, density, flatness and parallelism 

• Test performance and noise/NVH