We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China.
The most significant advantage of CNC-machined automotive bearings lies in their exceptional geometric accuracy and rotational stability. Utilizing high-precision CNC lathes and grinding centers, the diameter tolerances of the bearing's inner and outer rings can be stably controlled at P5 level (±0.004-0.008mm) or higher, with roundness error ≤0.002mm, raceway profile error ≤0.003mm, and surface roughness reaching Ra0.1-0.2μm. In automotive wheel hub bearing applications, this level of precision ensures smooth wheel rotation, radial runout controlled within 0.01mm, and significantly reduced vibration values during high-speed driving.
Precise control of the raceway and flange is particularly crucial. Through CNC profile grinding, the raceway radius accuracy is ±0.002mm, the flange angle accuracy is ±1°, and the transition between the raceway and flange is smooth with no stress concentration.
High-precision CNC turning of automotive bearings Trustworthy Stainless Steel CNC Parts
CNC machining technology has transformed automotive bearings from simple rotating bodies into multifunctional integrated components. For example, in flanged wheel hub bearings, the flange and bearing outer ring are machined in a single clamping process, with the perpendicularity of the flange end face to the axis ≤0.008mm and the mounting hole position accuracy ±0.02mm.
Precision machining of sealing grooves. Seal mounting grooves are machined on the inner and outer rings of the bearing, with a groove width accuracy of ±0.01mm and a groove bottom roughness Ra0.8μm, ensuring reliable seal installation. Maintenance-free wheel hub bearings utilize a labyrinth seal structure, preventing rust even after long-term use in muddy and wet environments.
Bearing steels such as GCr15 and carburized steel 20CrMo exhibit excellent performance in automotive bearing manufacturing. Through precision machining and heat treatment, surface hardness reaches HRC60-64, core toughness is good, and contact fatigue life is high.
Precise control of surface integrity. A super-smooth surface with Ra 0.05-0.1μm and a residual compressive stress layer depth of 0.02-0.05mm is achieved through ultra-precision machining. For engine bearings, the ultra-precision surface ensures complete oil film formation and improves anti-galling performance.
After rough machining, controlled atmosphere heat treatment is performed, with deformation controlled within 0.05mm, leaving a grinding allowance of 0.2-0.3mm. For precision bearings, the dimensions are stable and the metallographic structure is uniform after heat treatment.
Precision grinding and ultra-precision machining. High-speed grinding with CBN grinding wheels achieves a roundness of 0.0015mm, followed by ultra-precision machining to a surface roughness of Ra 0.05μm. For high-speed bearings, ultra-precision machining reduces raceway roughness and minimizes bearing temperature rise.
Precision machining of lubricating oil grooves. Lubricating oil grooves are machined on the inner or outer ring of the bearing, with a groove width accuracy of ±0.02mm and a groove depth accuracy of ±0.02mm. Heavy-duty machinery bearings feature precision oil grooves for even grease distribution.
Precision cage molding. Utilizing CNC machining or precision injection molding, the cage pocket accuracy is ±0.01mm, and the clearance with rolling elements is 0.1-0.2mm. For high-speed bearings, the precision cage ensures smooth rolling element movement and low noise.
High-speed grinding technology improves processing efficiency. Bearing steel grinding speeds can reach 80-120m/s; combined with CBN grinding wheels, grinding efficiency is increased by 2 times.
Flexible manufacturing adapts to diverse needs. Switching from one bearing specification to another can be completed within 30 minutes. Multi-variety, small-batch bearing production maintains controllable overall costs.
Deep application of automated production lines. Equipped with robotic automatic loading and unloading and online inspection systems, enabling 24-hour continuous production.
We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China. We have advanced high-end professional production and processing technology, and are committed to innovative R&D and production. After years of market tempering and exploration, it has high-quality technical management personnel, experienced designers, R&D personnel and a perfect company management system cnc precision.
5-axis CNC workshop
Our factory has a plant area of about 2,000 square meters and masters core processing technologies. It has high-end precision production equipment cnc precision: CNC lathes, 5-axis CNC, 4-axis CNC, stamping equipment, die-casting equipment, etc. 2.5-dimensional detection equipment 
cnc precision surface treatment
For surface treatment, our suppliers have been working with us for many years. They have rich experience and are familiar with all the quality requirements of each other. The quality is stable and more guaranteed. Such as: heat treatment, spray painting, powder coating, blackening, silver/gold plating, electrolytic polishing, nitriding, phosphating, nickel/zinc/chromium/TiCN plating, anodizing, polishing, passivation, sandblasting, galvanizing, heat treatment , hardening, laser marking, etc. according to customer requirements. Aluminum alloy surface oxidation
Packaging Details
Q1: Where can I get product & price information?
A1: Send us an inquiry e-mail, we will contact you once we received your mail.
Q2: How long will I get the sample?
A2: Depends on your specific items, within 3-7 days generally.
Q3: What kinds of information do you need for a quote?
A3: Kindly please provide the product drawings in PDF, if provide in STEP or IGS will be better.
Q4: What are the payment terms?
A4: We accept 50% as a payment deposit, when the goods are prepared, we shoot photos or videos for your check, and then you can pay the balance. For small quantities, we accept Paypal, the commission will be added to the order. For big amounts, T/T is preferred.
Q5: How to deliver the goods?
A5: We deliver the products by courier company.
Q6: Are you a trading company or factory?
A6: We are factory direct with 17 experienced engineers and more than 50 employees as well approximate 3,000m2 workshop area.
Q7: What shall we do if we don't have drawings?
A7: Please send your sample to our factory, then we can copy and provide you better solutions. If send us pictures or drafts with dimensions(Length, Height, Width), CAD or 3D file will be made for you.
Q8: Can we get some samples before mass production?
A8: Absolutely yes.
Q9: Will my drawings be safe after sending them to you?
Q10: Is it possible to know the operation status of my products without visiting your company?
A10: We will offer a detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.
