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Custom Bearings - Aokai

Your trusted partner for precision-engineered custom bearings, delivering tailored solutions across industries.

Advantages

Why Choose Custom Bearings from Aokai?

Aokai combines decades of bearing manufacturing expertise with advanced CNC technology to deliver bearings that match your exact specifications.

Full Design Flexibility

We provide complete bearing customization services to meet specific application requirements. Customers can customize key parameters such as bore diameter, outer diameter, width, internal clearance, cage design, lubrication method, and bearing structure. Our engineering team works closely with customers to optimize bearing designs for improved performance, reliability, and service life.

Wide Range of Material Options

Different operating environments require different material solutions. We offer various bearing materials, including GCr15 chrome bearing steel for general industrial applications, 440C stainless steel for corrosion-resistant environments, Si₃N₄ ceramic materials for high-speed and high-temperature applications, as well as PEEK/PTFE polymer solutions for lightweight and chemically demanding conditions.

High-Precision Manufacturing Capability

Our advanced manufacturing equipment enables us to produce bearings with strict dimensional accuracy and performance consistency. Depending on application requirements, we can achieve high precision levels equivalent to ISO P5, P4, and P2 grades, making our bearings suitable for machine tools, robotics, aerospace equipment, and other precision applications.

Advanced Surface Treatments & Coating Technologies

To improve bearing durability and environmental resistance, we provide various surface treatment options, including black oxide anti-corrosion treatment, titanium nitride (TiN) coating, DLC coating, zinc plating, and specialized heat treatment processes. These technologies help enhance wear resistance, reduce friction, and extend bearing service life under challenging operating conditions.

Prototype Development & Flexible Production

We support both prototype projects and volume production requirements. With flexible manufacturing capabilities, we can provide low-volume orders starting from 10 pieces for testing and validation purposes. Our efficient production process helps shorten development cycles, allowing customers to evaluate and implement customized bearing solutions faster.

Comprehensive Quality Inspection & Performance Testing

Every bearing undergoes strict quality control procedures before shipment. Our inspection process includes dimensional accuracy measurement, clearance testing, vibration analysis, noise inspection, rotational torque testing, and appearance checks. These procedures ensure every bearing meets customer specifications and delivers stable performance in real-world applications.

Engineering Support & Application Optimization

Our experienced technical team provides professional support throughout the entire customization process, from initial design consultation and material selection to performance optimization and production verification. We analyze application conditions and recommend suitable bearing structures, materials, and manufacturing processes to maximize reliability and efficiency.

Global Supply Chain & Reliable Delivery Service

With extensive export experience, we provide efficient global logistics solutions for customers worldwide. We support international shipping, secure packaging, export documentation, and customized delivery arrangements to ensure bearings arrive safely and on schedule. Our products have been supplied to customers in more than 40 countries across various industrial markets.

Manufacturing Process

Custom Bearing Manufacturing Process

From concept to delivery, Aokai follows a rigorous six-stage process to ensure your custom bearings meet the most demanding specifications.

Every custom bearing project begins with a detailed understanding of the customer's operating conditions. Our engineers analyze critical application parameters, including load capacity, rotational speed, operating temperature, lubrication requirements, environmental conditions, installation limitations, and expected service life. Based on these factors, we define the optimal bearing structure, performance targets, and manufacturing requirements to ensure the final product matches the actual working environment.

Our engineering team uses advanced CAD design and simulation tools to develop customized bearing solutions. We create detailed 2D drawings and 3D models for customer review and approval while conducting tolerance stack-up analysis to optimize dimensional accuracy and assembly performance. For complex applications, our engineers evaluate stress distribution, contact conditions, and operating behavior to improve bearing reliability before production begins.

Selecting the right material is essential for bearing durability and performance. We source certified raw materials from qualified suppliers and conduct strict incoming inspections before manufacturing. Each material batch undergoes chemical composition analysis, hardness testing, and metallurgical inspection to verify material consistency and ensure excellent strength, fatigue resistance, and wear performance.

Our advanced CNC machining equipment enables high-precision manufacturing of bearing rings and components. Through precision turning, grinding, and super-finishing processes, we achieve strict dimensional tolerances and excellent surface quality. Key machining capabilities include: Raceway surface roughness: Ra ≤ 0.08 μm Roundness accuracy: within 1 μm Precision grinding for optimized roller and raceway contact Controlled machining processes for consistent production quality These precision manufacturing capabilities help reduce friction, vibration, and operating noise while improving bearing service life.

To enhance mechanical strength and operating durability, bearing components undergo controlled heat treatment processes, including carburizing, quenching, and tempering. The optimized heat treatment process achieves stable hardness levels of approximately HRC 58–64 while improving wear resistance, contact fatigue strength, and dimensional stability. For special operating environments, we also provide surface treatment options such as anti-corrosion coatings, low-friction coatings, and customized surface enhancement solutions.

During assembly, each bearing is carefully cleaned and assembled under controlled conditions to prevent contamination and ensure stable operation. Lubrication quantity and distribution are precisely calculated according to application requirements. Before shipment, every custom bearing undergoes comprehensive performance testing, including: Dimensional accuracy inspection Internal clearance measurement Vibration testing according to BVT standards Noise analysis using precision measuring equipment Running torque evaluation with high-accuracy testing systems These inspection procedures ensure each bearing meets customer specifications and delivers reliable performance in actual applications.

To maintain product quality during transportation, every bearing is professionally packaged with protective materials, including vacuum-sealed packaging, VCI anti-rust protection, shock-resistant cartons, and complete traceability labels. With extensive international shipping experience, Aokai provides reliable logistics support, export documentation, and customized delivery solutions to ensure products arrive safely and on schedule.

FAQ

FAQs about Custom Bearings

Find quick answers to the most common inquiries from our customers regarding customization, pricing, and lead times.

What information do you need to provide a quotation for custom bearings?

Please submit the following: bearing type, inner/outer diameter and width, required material, desired precision grade (e.g., P0/P6/P5), any specific clearance or preload, operating conditions (load, speed, temperature), and target quantity. A drawing or sketch is helpful but not mandatory.

Do you have minimum order quantities (MOQ)?

Yes, standard MOQ is 10 pieces for new designs. For repeat orders of existing designs, MOQ can be as low as 5 pieces. For high-volume production, we can negotiate lower unit prices with larger MOQs.

What is the typical lead time for a custom bearing order?

For prototype quantities (≤100 pcs) with standard materials, production takes 15-20 working days. For medium runs (100-5000 pcs) with moderate complexity, lead time is 25-35 working days. Large or complex orders may require 45-60 working days. We offer expedited services for urgent needs.

Can you manufacture bearings to non-metric dimensions?

Absolutely. We work with both metric (ISO) and inch (ANSI/ABMA) dimensions. Our CNC equipment can handle any size within our machine range (ID 1mm to 1200mm).
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