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Brake Discs CNC Machining Services for the Automotive Industry
Brake discs are precision-machined friction components that convert kinetic energy into thermal energy through controlled friction contact with brake pads in automotive braking systems, including solid rotors, vented rotors, drilled rotors, and slotted disc configurations. At Zintilon, we specialize in CNC machining of brake rotor surfaces, mounting hubs, ventilation channels, and friction rings to achieve exceptional flatness, thickness uniformity, and long-term reliability for critical automotive safety and braking performance applications.
- Machining for precise friction surface flatness and parallelism
- Tight tolerances up to ±0.0003 in for braking consistency
- Precision turning, milling, grinding & surface finishing
- Support for rapid prototyping and full-scale production
- ISO 9001-certified manufacturing with automotive industry expertise
Trusted by 15,000+ businesses
Automotive Connectors Parts Machining Capabilities
Fast Delivery
A professional engineering team that can respond quickly to customer needs and provide one-stop services from design to production in a short period of time to ensure fast delivery.
High Precision
We are equipped with automated equipment and sophisticated measuring tools to achieve high accuracy and consistency, ensuring that every part meets the most stringent quality standards.
ITAF16949 Certified
As a IATF16949 certified precision manufacturer, our products and services have met the most stringent quality standards in the automotive industry.
From Prototyping to Mass Production
Zintilon is certified for the ISO 9001 standard and supplies engineered components to automotive manufacturers, brake system suppliers, performance parts producers, and aftermarket brake component integrators worldwide.
Prototype Brake Discs
Obtain high-precision prototypes of brake disc assemblies that accurately replicate your final design. Verify friction surface quality, evaluate thermal performance, test dimensional stability, and confirm braking efficiency before full-scale automotive production.
Key Points:
Key Points:
- Rapid prototyping with high precision
- Tight tolerances (±0.0003 in)
- Test surface finish, heat dissipation, and durability early
EVT – Engineering Validation Test
Brake disc configuration and design must meet all dimensional accuracy, surface finish, and thermal stability requirements for prototype construction. Identify warping tendencies and friction surface defects early to ensure consistent braking performance, as prototype discs are adjusted for thermal management and friction requirements.
Key Points:
Key Points:
- Validate prototype functionality
- Rapid design iterations
- Ensure readiness for production
DVT – Design Validation Test
Use different materials and ventilation designs to analyze brake disc performance for heat dissipation and fade resistance. This is to assess the automotive braking system performance to achieve the desired stopping power and thermal stability before production.
Key Points:
Key Points:
- Confirm design integrity and thermal specifications
- Test multiple materials and configurations
- Ensure production-ready performance
PVT – Production Validation Test
Assess large-scale production capabilities for brake discs and evaluate production consistency challenges before initiating full production to address uniformity and efficiency gaps in the manufacturing process flow.
Key Points:
Key Points:
- Test the large-scale production capability
- Detect and fix process issues early
- Ensure consistent part quality
Mass Production
Make brittle discs for aircraft, guaranteeing reliable brakes and on-time deliveries to OEM customers on large aircraft brake and wheel systems, and deliveries on brake and wheel systems to suppliers.
Key Points:
Key Points:
- Consistent, high-volume production
- Precision machining for automotive quality
- Fast turnaround with strict quality control
Simplified Sourcing for
the Automotive Industry
Through excellent processing technologies such as CNC machining, sheet metal manufacturing, metal casting, etc., we can achieve a balance between quality and speed, whether it is special-shaped parts, lightweight or cost effect.
Explore Other Aerospace Components
Discover our full range of precision CNC machined aerospace parts, designed for strength, durability, and exact fit. Explore components for engines, fuselage, tail sections, landing gear, and more to meet every aircraft manufacturing need.
Automotive Industry, Brake Discs, Machining Capabilities
We are equipped with CNC multi-axis turning centers and surface grinding machines to ensure quality while taking advantage of our experienced machining to deliver Brake Discs CNC Machining Services for the Automotive Industry. Each part, from solid brake rotors with diameters from 240 to 380 mm to vented discs with internal cooling channels, drilled and slotted performance rotors with optimized friction patterns, and floating disc assemblies with thermal expansion accommodation features, is precisely designed for maximum heat dissipation and to minimize brake fade with dependable performance for over 100,000 km.
We perform precision CNC turning for friction surfaces with flatness tolerance of ±0.015 mm and thickness variation (DTV) below 0.010 mm, surface grinding for final finish, achieving Ra values from 0.8 to 3.2 microns, precision drilling for mounting holes with positional accuracy of ±0.050 mm, and milling for ventilation vanes with channel width accuracy of ±0.100 mm. We also conduct runout measurement and thermal cycling validation. We manufacture brake discs from grey cast iron (G3000, GG15, GG20) for excellent friction characteristics and thermal stability, high-carbon cast iron (G4000) for enhanced wear resistance and heat capacity, carbon ceramic composites for ultra-lightweight high-performance applications reducing unsprung weight by 50 to 60 percent, or specialized materials like ductile iron for improved impact resistance, stainless steel for marine and off-road corrosion resistance, and two-piece aluminum hat with cast iron friction ring for weight reduction. We ensure excellent thermal management with heat dissipation capacity from 50 to 500 kW, depending on disc size and application, superior dimensional stability with DTV below 0.010 mm throughout service life, continuous operation at friction surface temperatures from 200°C to 800°C, and mechanical durability for over 100,000 km or 50,000 brake applications.
We perform precision CNC turning for friction surfaces with flatness tolerance of ±0.015 mm and thickness variation (DTV) below 0.010 mm, surface grinding for final finish, achieving Ra values from 0.8 to 3.2 microns, precision drilling for mounting holes with positional accuracy of ±0.050 mm, and milling for ventilation vanes with channel width accuracy of ±0.100 mm. We also conduct runout measurement and thermal cycling validation. We manufacture brake discs from grey cast iron (G3000, GG15, GG20) for excellent friction characteristics and thermal stability, high-carbon cast iron (G4000) for enhanced wear resistance and heat capacity, carbon ceramic composites for ultra-lightweight high-performance applications reducing unsprung weight by 50 to 60 percent, or specialized materials like ductile iron for improved impact resistance, stainless steel for marine and off-road corrosion resistance, and two-piece aluminum hat with cast iron friction ring for weight reduction. We ensure excellent thermal management with heat dissipation capacity from 50 to 500 kW, depending on disc size and application, superior dimensional stability with DTV below 0.010 mm throughout service life, continuous operation at friction surface temperatures from 200°C to 800°C, and mechanical durability for over 100,000 km or 50,000 brake applications.
Aerospace
Materials & Finishes
Materials
We provide a wide range of materials, including metals, plastics, and composites.
Finishes
We offer superior surface finishes that enhance part durability and aesthetics for applications requiring smooth or textured surfaces.
Specialist Industries
you are welcome to emphasize it in the drawings or communicate with the sales.
Materials for Brake Discs
Our CNC machine shop uses and offers for brake discs 8+ high-performance cast irons, ceramic composites, and specialty alloys to support rapid prototyping, precision automotive manufacturing, and to manufacture and maintain quality to SAE, ECE R90, and automotive brake system specifications.
High machinability and ductility. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.003 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Titanium is an advanced material with excellent corrosion resistance, biocompatibility, and strength-to-weight characteristics. This unique range of properties makes it an ideal choice for many of the engineering challenges faced by the medical, energy, chemical processing, and aerospace industries.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Brass is mechanically stronger and lower-friction metal properties make CNC machining brass ideal for mechanical applications that also require corrosion resistance such as those encountered in the marine industry.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Iron is an indispensable metal in the industrial sector. Iron is alloyed with a small amount of carbon – steel, which is not easily demagnetized after magnetization and is an excellent hard magnetic material, as well as an important industrial material, and is also used as the main raw material for artificial magnetism.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Due to the low mechanical strength of pure magnesium, magnesium alloys are mainly used. Magnesium alloy has low density but high strength and good rigidity. Good toughness and strong shock absorption. Low heat capacity, fast solidification speed, and good die-casting performance.
Price
$ $ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Let’s Build Something Great, Together
FAQs: Brake Discs for Automotive Industry Applications
For standard passenger automobiles, brake disc configurations consist of precision-engineered solid rotors with diameters ranging between 240 and 320 millimeters and thicknesses from 8 up to 28 millimeters, along with vented rotors featuring between 30 and 72 internal cavity cooling vanes which increase heat disspation by 40 to 60 percent, and drilled rotors, that contain 40 to 120 cross drilled holes that enhances braking performance in the water and reduces the mass of the disc. Other types also include slotted rotors which consist of 20 to 48 radially or curved slotted to allow for the degassing of brake pads and a consistent friction, and floating disc assemblies that include aluminum bell housings, which reduces the total of 15 to 25 percent of the overall mass of the assembly. The friction surfaces of these components require a flatness within 0.015 millimeters, a thickness variation (DTV) of 0.010, parallelism within 0.020 mm, and skid surfaces have a runout below 0.050 to improve gripping performance and must fall within the range of 170 to 250 HB of hardness per SAE J431.
Grey cast iron, also known as G3000, GG15, GG20 displays remarkable attributes such as feedback characteristics with a friction coefficient between 0.35 to 0.45, special thermal conductivity within 50-55 W/m·K, a beneficial quality for efficient thermal management, good cementing attributes which reduce break noise, self-sustaining characteristics which reduce the wear on the pads, and a low price point which allows it to be massed produced with consistent reliability, and wear rates between 0.05 to 0.15 mm every 10,000. G4000, also known as white high-carbon cast iron, has thermal characteristics that reduce thermal conductivity and allow the iron to remain thermal for a longer period. It also has a high hardness, denoted by 200-250 HB. Older thermal-resistant materials of 300-400 MPa do not usually survive a period of 100,000 km. Composite ceramics preserve carbon and allow it to remain thermally resistant to 1000 °C. It also has a remarkable rotor that survives over 300,000 km, does not produce bricks, and a dust of 40% is also reduced.
The representatives of CNC turning achieved a sufficient level of friction surface flatness tolerance within a possible ±0.015 mm range in thickness variation (DTV) below 0.010 mm and surface finishing 1.6 to 3.2 Ra microns. Further surface finishing was done by surface grinding within a flatness of ±0.010 mm and Ra 0.8-1.6 microns for the purpose of reaching the final surface quality and optimal pad break-in. For the purpose of the precise positioning of mounting holes was achieved by the utilization of precision drilling, which has a diameter tolerance of ±0.025 mm and positional accuracy of ±0.050 mm. Diameter of 8 to 12 mm and chamfered edges, preventing crack initiation, were requirements for cross-drilling cooling holes. Slot milling was used to produce degassing grooves, having a width accuracy of ±0.200 mm and depth control ±0.100 mm. Internal milling with channel spacing accuracy of ±0.200 mm was used to create corrosion-resistant ventilation vanes. Finally, the representatives of Runout measurement achieved a sufficient level of lateral runout below 0.050 mm and axial runout below 0.030 mm on the hub mounting surface.
We uphold several operational tolerances for flatness of friction surfaces within ±0.015 mm for uniform pad contact for all the disc areas, for disc total thickness variation (DTV) less than 0.010 mm which provides preventive control for brake pulse and pedal oscillation, for friction faces thickness parallelism within ±0.020 mm of each other, for hub mounting bolts’ hole diameter positional accuracy and tolerances of ±0.025 mm and ±0.050 mm respectively, for lateral runout within 0.050 mm of hub fixing preventing brake judder, for angular position of hub mounting flat surfaces to each other to have perpendicularity with tolerances of within 0.030 mm, and for the surface texture to have Ra 0.8 to 3.2 microns finished for optimal pad wear. These tolerances assist with the consistency of the braking force to be within ±5 percent from thermal norme stability with DTV within 0.015 mm after 100 cycles of heating from 20 to 500 degrees to have close set stopping distance for multiple iterated tests to be within ±3 percent distance for each repeated test of 90 ECE R90, and have operational life of the parts extend to 100k kilometers or 50k cycles of brake use.
Yes, we perform rapid prototyping with CMM dimensional inspection at ±0.005 mm accuracy, DTV measurement using precision micrometers at ±0.002 mm resolution, runout measurement with dial indicators, surface finish analysis to 0.1 Ra microns, hardness testing from 170-250 HB per SAE J431, and thermal cycling testing from ambient to 500°C for 50 cycles. We conduct low-volume production for performance vehicles and racing applications, producing 100 to 5,000 discs annually, and high-volume production for automotive OEMs. We supply vehicle manufacturers with brake disc components in volumes from thousands to millions annually, including dimensional certification with DTV and runout documentation, friction surface flatness reports, material certification with hardness verification, thermal stability test results, dynamometer braking performance data, and full quality documentation meeting IATF 16949, ISO 9001, SAE J431, ECE R90, FMVSS 135, and automotive brake system safety and manufacturing standards.
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