Tesla Composite Steel Hat Brake Discs

• Being a world leading professional brake parts manufacturer, Winhere produces more than 55 million units of brake discs and 10 million sets of brake pads annually for OEM and IAM. 

• 96%+ car parc coverage of brake discs and brake pads from A to Z for both passenger cars and commercial vehicles. 

• IATF16949, ISO14001, ISO45001, ECE R90, CNAS certificated. 

• National Green Manufacturer and China’s Champion Enterprise awarded by M.I.I.T. and C.F.I.E. 

• National Standard of “Brake Disc for Automobile” GB/T 34422-2017 is led by National Quality Supervision and Inspection Center for automobile parts, Winhere is the responsible drafting company for this national standard.

Unique & Distinctive Highlights

1. Functional slots, not just decorative styling

   Many suppliers offer slotted discs merely for visual appearance, with shallow, rough‑cut grooves that bring little practical gain. Our slots are engineered with carefully calculated depth, width and angle. Instead of superficial decoration, they act as continuous self‑cleaning channels. As the rotor spins, slots gently scrape away the glazed hard layer built up on brake pads, sweep away pad dust, grit and road contaminants out of the friction contact zone. It effectively inhibits brake squeal and maintains stable friction output over long service time.

2. Wet‑condition braking reliability, tackling real‑world road risks

   On rainy or humid days, a thin water film easily forms between disc and pad, which may cause temporary brake response drop. The slotted design cuts through surface water film instantly during rotation, draining moisture out from friction interface. It avoids slippery brake feel caused by water intrusion, delivering consistent braking feedback in wet‑weather commuting, an advantage ordinary smooth rotors cannot match.

3. Balance upgrade performance and structural durability

   Compared with cross‑drilled performance rotors, slotted structure avoids small‑hole stress concentration points. Under cyclic heating and cooling from frequent braking, the disc body bears thermal stress more evenly. It greatly lowers hidden cracking risk, making it far more suitable for daily street use rather than only track‑use. You get performance‑oriented improvement without sacrificing service lifespan.

4. Dual‑layer heat dissipation system: ventilation vanes plus surface slots

   Internal curved ventilation vanes drive forced air circulation inside the rotor to take away core heat. Meanwhile, surface slots expand the effective heat‑radiating area of friction faces. Heat escapes both from inner cavity and outer working surface. When facing continuous downhill braking or heavy‑traffic stop‑and‑go scenarios, it suppresses temperature build‑up more efficiently than plain ventilated discs, reducing thermal‑fade tendency.

5. Controlled slot dimension to prevent accelerated wear

   Poor‑quality slotted rotors adopt overly‑deep or sharp‑edged slots. They will aggressively bite into brake pads and shorten pad service life significantly. Our milling process produces smooth, burr‑free slot edges. Slot depth stays within street‑use engineering range. It realizes debris removal and anti‑glazing function, yet avoids excessive abrasion to matching brake pads, reaching a fine balance between braking upgrade and component service life.

6. Dynamic balance compensation for slotted modification

   Slot milling removes partial material from friction surface, which will introduce subtle weight deviation. We do not reuse standard balance parameters for smooth discs. Every finished slotted rotor undergoes independent dynamic‑balance correction to offset weight loss caused by slot processing. It eliminates high‑speed vibration source, securing smooth steering‑wheel performance during high‑speed braking.

7. Stress‑relieved high‑carbon cast iron substrate for complex working conditions

   Cast iron blanks go through complete stress‑relief annealing treatment to eliminate residual stress generated in casting. The disc owns uniform hardness across the whole friction surface. Partial local wear and uneven material loss are restrained. It resists thermal warping when enduring repeated hot‑cold shock, a critical advantage over low‑cost competitors that skip annealing steps.

8. OE‑equivalent mounting geometry for trouble‑free swap‑in

   Mounting plane, central locating bore and bolt hole positions strictly follow original equipment dimension standards. Even with slotted modification on friction surfaces, all installation reference surfaces keep high‑precision tolerance. Direct bolt‑on replacement, no modification, no re‑drilling required, perfectly fit original hub and wheel assembly.

Application scenarios

• City daily driving: Frequent start‑stop traffic, resist pad glazing and lower brake noise.

• Mountain & downhill routes: Combined ventilation + slot structure controls temperature, keeps stable braking output under sustained load.

• Rainy‑region markets: Slotted water‑drain design improves safety in wet driving conditions.

• Aftermarket upgrade business: Cost‑effective performance upgrade for repair shops, differentiates from common standard brake discs.

• 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