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Bearing Seats Parts CNC Machining Services for Automotive

Automotive bearing seats are precision-machined surfaces that house and support rotating bearings in engines, transmissions, and drivetrains. At Zintilon, we specialize in CNC machining of automotive bearing seats using advanced CNC turning and boring to achieve exceptional concentricity, surface finish, and dimensional accuracy.
  • Machining for complex bearing housing geometries
  • Tight tolerances up to ±0.0001 in
  • Precision boring, turning & surface finishing
  • Support for rapid prototyping and full-scale production
  • IATF 16949-certified automotive manufacturing


Trusted by 15,000+ businesses

Automotive Bearing Seats Machining Capabilities

prductivity

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.

10x

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.

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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 provides CNC machining services for automotive bearing seats and related precision housing components for passenger vehicles, commercial applications, and performance automotive projects.

Prototype Bearing Seats

Obtain high-precision prototypes of automotive bearing seats that accurately replicate your final design. Test bore concentricity, verify surface finish, and ensure proper bearing fit before full-scale vehicle production.
Key Points:
Rapid prototyping with high precision
Tight tolerances (±0.0001 in)
Test design, material, and fitment early
3 Axis CNC Machined Stainless Steel Passivation

EVT – Engineering Validation Test

Quickly iterate on bearing seat prototypes to ensure they meet all functional and durability requirements. Identify potential issues early for a smoother transition to full-scale automotive manufacturing.
Key Points:
Validate prototype functionality
Rapid design iterations
Ensure readiness for production
Anodized Aluminum 1024x536

DVT – Design Validation Test

Validate the dimensional accuracy and functionality of bearing seats using various materials and surface treatments to ensure design accuracy and optimal bearing life before mass production.
Key Points:
Confirm design integrity and precision
Test multiple materials and finishes
Ensure production-ready performance
design aluminium

PVT – Production Validation Test

Verify large-scale production feasibility for bearing seats and identify potential manufacturing challenges before full production begins to ensure consistency and efficiency.
Key Points:
Test large-scale production capability
Detect and fix process issues early
Ensure consistent part quality
Anodized Titanium Fastener

Mass Production

Produce high-quality, end-use bearing seats at scale with precision and speed, ensuring reliable component operation and on-time delivery for automotive OEMs and aftermarket suppliers.
Key Points:
Consistent, high-volume production
Precision machining for OEM-grade quality
Fast turnaround with strict quality control
production

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.

Car Parts
Machining Capabilities

milling

CNC Machining

sheet metal

Sheet Metal Fabrication

edm

Wire EDM

casting

Metal Casting

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

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Materials for Bearing Seats Components

Our CNC machine shop offers a wide range of materials for Bearing Seats Parts Machining for Automotive. With 50+ automotive-grade cast metals, steel alloys, and aluminum materials, we support rapid prototyping and precision housing component manufacturing with consistent accuracy and OEM-quality standards.
Aluminum Image

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 Image

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 Image

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 Image

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
Bronze Image

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 Image

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
Copper Image

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 Image

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 Image

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
Magnesium Image

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

Yes. Our precision line boring equipment and portable machining capabilities allow us to machine bearing seats in pre-assembled or partially assembled engine blocks, transmission cases, and differential housings. This ensures perfect bore alignment across multiple bearing locations, corrects bore distortion caused by bolt-down torque or manufacturing variations, and allows for bearing seat restoration in used components during remanufacturing operations, making it ideal for racing engine preparation, transmission rebuilds, and high-performance applications where perfect bearing alignment is critical for reliability.

We provide comprehensive finishing solutions tailored to aerospace requirements:
Anodizing (Type II and Type III)
Passivation for corrosion resistance
Precision polishing for aerodynamic surfaces
Custom protective coatings and thermal barriers

Yes. We offer flexible manufacturing capabilities including:
Rapid prototyping for design validation
Low-volume production for specialized applications
High-volume production with consistent quality control
Full dimensional and aerodynamic verification at every stage

We routinely achieve tolerances as tight as ±0.0001 inches on bearing bore diameters, ensuring precise concentricity between multiple bearing bores within 0.0002 inches for proper shaft alignment, accurate bore depth control for proper bearing shoulder contact and axial location, proper surface finish between 8-32 Ra microinches for optimal oil film retention and bearing life, correct bearing interference fits or running clearances according to bearing manufacturer specifications, and perpendicularity of bearing bores to mounting surfaces within 0.001 inches to prevent edge loading and premature bearing failure under rotational loads.

earing seat production utilizes advanced precision machining technologies including CNC boring for accurate bore diameter and depth control with single-point or adjustable boring heads, precision CNC turning for external bearing housing surfaces and shoulder dimensions, finish honing for final bore sizing and optimal surface finish between 8-32 Ra microinches, line boring for maintaining perfect alignment between multiple bearing bores in a single housing, grinding for bearing race seats requiring extreme precision and surface finish, bearing bore chamfering for proper bearing insertion and stress relief, and oil groove and passage machining for lubrication distribution to bearing surfaces, ensuring proper oil film formation and heat removal during operation.

Each material offers distinct advantages for bearing seat applications. Cast iron engine blocks provide excellent dimensional stability, superior damping characteristics that reduce noise and vibration, natural wear resistance for long bearing life, and proven durability for high-mileage applications in both gasoline and diesel engines. Aluminum housings offer significant weight reduction, excellent thermal conductivity for heat dissipation, and adequate strength for most passenger vehicle applications when properly designed with appropriate wall thickness and reinforcement. Steel transmission cases deliver maximum strength and rigidity for high-torque applications, superior bearing support under extreme loads, and dimensional stability under temperature variations. Ductile iron combines the wear resistance of cast iron with improved strength and impact resistance for differential housings and heavy-duty components that experience shock loads and sustained high torque.

Automotive bearing seats are precision-machined cylindrical surfaces or bores that house and support ball bearings, roller bearings, or plain bushings in rotating assemblies throughout the vehicle. Critical bearing seat applications include engine block main bearing bores that support the crankshaft, cylinder head camshaft bearing journals, connecting rod big-end bearing surfaces, transmission input and output shaft bearing housings, differential carrier bearing bores, wheel hub bearing seats, and transfer case bearing locations. These precisely machined surfaces must maintain exact dimensional tolerances, proper surface finish, and perfect concentricity to ensure bearing longevity, minimize friction, prevent misalignment, and eliminate vibration under all operating conditions.
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