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Cross Roller Bearing Manufacturers

Crossed Roller Bearings (Cross-Roller Bearings)Crossed Roller Bearings, also known as cross-roller bearings, utilize an internal structure where cylindrical rollers are arranged crosswise at a 90° angle to each other within V-shaped raceways. Separators or spacers are placed between the rollers.This structure allows a single bearing to simultaneously handle loads in all directions, including radial loads, axial loads, and overturning moments. The bearings are characterized by their minimal overall dimensions (miniaturization), high rigidity, high rotational accuracy, and combined load-carrying capacity. Therefore, they are best suited for: Joints or rotating parts of industrial robots. Rotating parts of manipulators/robot hands.Rotary tables of machining centers.Precision rotary tables.Medical equipment.Measuring instruments.IC manufacturing equipment, and other applications. Structural Types of Crossed Roller Bearings Crossed roller bearings are generally classified into three structural forms: Outer ring separable, inner ring integrated. Outer ring integrated, inner ring separable. Both outer and inner rings are integrated.
1. RB Type (Separable Outer Ring, Integrated Inner Ring)Structure: The outer ring is split into two pieces, while the inner ring is a single, integrated component.Application: Suitable for applications requiring high rotational accuracy of the inner ring.
2. RE Type (Integrated Outer Ring, Separable Inner Ring)Structure: Has the same external dimensions as the RB type, but the outer ring is integrated, and the inner ring is split into two pieces.Application: Suitable for applications requiring high rotational accuracy of the outer ring.
3. RU Type (Integrated Inner and Outer Rings, with Mounting Holes)Structure: Both inner and outer rings are integrated and feature mounting holes. This eliminates the need for fixing flanges and support seats, making it very convenient to use. Performance: Since the inner and outer rings are integrated, installation has minimal effect on performance, ensuring stable rotational accuracy and torque.Application: Suitable for applications requiring high rotational accuracy for both the inner and outer rings.
4. RA Type (Separable Outer Ring, Integrated Inner Ring, Ultra-Thin)Structure: An ultra-thin design where the thickness of the inner and outer rings is reduced to the maximum extent. The structure is the same as the RB type, with a split outer ring. Application: Suitable for parts requiring lightweight and compact design, such as the rotating sections of robots and manipulators.
5. RBH Type (Integrated Inner and Outer Rings, Ultra-Thin)Structure: Ultra-thin design with integrated inner and outer rings, but without mounting holes. Requires fixing with flanges and support seats during installation.Performance: The integrated structure of both rings prevents performance degradation due to installation, ensuring stable rotational accuracy and torque.Application: Suitable for applications requiring small size (miniaturization) while maintaining high rotational accuracy for both inner and outer rings.
6. SX Type (Integrated Inner Ring, Separable Outer Ring, Ultra-Thin)Structure: For the same shaft diameter, the SX type has a smaller cross-section than the RB type. Due to the ultra-thin design, neither the inner nor outer rings have mounting holes, requiring fixing with flanges and bearing seats during installation. Application: Suitable for applications where the inner ring rotates.

Engineering the Future of Motion
About UKL
Founded in 2020, UKL Bearing Manufacturing Co., Ltd. (Wuxi) is China Cross Roller Bearing manufacturers and Cross Roller Bearing factory, an integrated industrial and trading enterprise that focuses on precision manufacturing, combining R&D, production, and sales.
The company specializes in high-performance bearing solutions, providing technical support for global industries with exceptionally high demands for precision and reliability.

With more than 200 skilled professionals and a fully modernized production base, UKL’s facilities cover the entire manufacturing process — forging, annealing, turning, heat treatment, grinding, and automated assembly.
Leveraging over 15 years of OEM/ODM export experience, UKL responds quickly to customer needs, offering flexible and customized services for clients across Europe, Asia, Africa, and the Middle East.

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Cross Roller Bearing Industry knowledge

In the world of precision engineering, the demand for components that offer simultaneous high rigidity, space-saving designs, and multi-directional load capacity has never been higher. Cross Roller Bearings have emerged as the gold standard for high-performance rotary motion, particularly in industries where precision is non-negotiable.

What Are Cross Roller Bearings?

Cross Roller Bearings are specialized rolling-element bearings where cylindrical rollers are arranged orthogonally—positioned at right angles to each other—within V-shaped raceways. This unique “crossed” configuration allows a single bearing to handle radial, axial, and moment loads simultaneously.

Unlike traditional ball bearings, which rely on point contact, the cylindrical rollers in a cross roller bearing provide line contact. This significantly increases the contact surface area, resulting in superior stiffness and minimal elastic deformation under heavy or complex loads.

Key Advantages of Cross Roller Bearings

  • High Rotational Accuracy: The orthogonal arrangement reduces skewing and friction, ensuring exceptionally low runout.
  • Superior Rigidity: Cross roller bearings are 3 to 4 times more rigid than standard angular contact ball bearings.
  • Compact Footprint: Because one cross roller bearing can replace two traditional bearings (like a thrust + radial combination), it allows for significant downsizing of equipment.
  • Simplified Installation: Modern designs, such as those with mounting holes, allow for direct bolting to the housing, reducing assembly complexity.

Comparison: Cross Roller Bearings vs. Traditional Bearings

To help you choose the right solution for your equipment, the following table compares the performance metrics of Cross Roller Bearings against common alternatives.

Feature Cross Roller Bearings Deep Groove Ball Bearings Tapered Roller Bearings
Load Direction Radial + Axial + Moment Primarily Radial Radial + Single-way Axial
Rigidity Ultra-High Moderate High
Space Requirement Minimal (Compact) Moderate Large (often requires pairs)
Precision Grade P2 / P4 / P5 P0 / P6 P5 / P6
Main Application Robotics, CNC Tables Motors, Appliances Automotive, Heavy Industry

Applications in Modern Industry

As a professional bearing factory in China, UKL provides technical support for global industries that require reliable, high-precision movement. Our Cross Roller Bearings are vital components in:

  1. Industrial Robotics: Used in the “waist,” “shoulder,” and “elbow” joints of robotic arms to ensure smooth and accurate positioning.
  2. CNC Rotary Tables: Providing the stability needed for high-speed machining and vertical boring mills.
  3. Medical Equipment: Essential for the high-precision rotation required in CT scanners and MRI machines.
  4. Aerospace & Defense: Supporting radar pedestals and precision satellite tracking systems.

Why Choose UKL Bearing Manufacturing Co., Ltd.?

As an integrated industrial and trading enterprise, UKL Bearing Manufacturing Co., Ltd. (Wuxi) stands out in the competitive landscape through our commitment to precision and flexible service.

1. Integrated Manufacturing Excellence

Unlike many trading firms, UKL operates a fully modernized production base. Our facilities cover the entire manufacturing lifecycle: Forging → Annealing → Turning → Heat Treatment → Grinding → Automated Assembly. This allows us to maintain strict quality control at every stage.

2. High-Precision Standards

Leveraging advanced testing instruments, we produce bearings that reach precision grades of P5, P4, and even P2. Our materials consist of high-purity bearing steel subjected to specialized heat and cold treatment processes to maximize fatigue life.

3. Global OEM/ODM Expertise

With over 15 years of export experience, we understand the nuances of the global market. We offer:

  • Quick Response: Rapid quotes and technical consultations.
  • Customization: Tailored solutions for non-standard requirements based on customer drawings.
  • Proven Reliability: Proudly serving clients across Europe, Asia, Africa, and the Middle East with ISO9001 and ISO14001 certified processes.

4. Technical Support and Service

At UKL, we don’t just sell bearings; we provide solutions. Our team of over 200 skilled professionals offers technical assistance from the initial drawing confirmation to after-sales maintenance, ensuring your machinery operates at peak performance.

Selecting the Right Cross Roller Bearing

When sourcing from a bearing manufacturing company, consider these three critical factors:

  • Inner/Outer Ring Rotation: Determine if the inner ring, outer ring, or both will be rotating, as this dictates the model (e.g., RB, RE, or RU series).
  • Clearance and Preload: High-precision applications typically require a negative clearance (preload) to enhance rigidity.
  • Environment: For clean rooms or corrosive environments, special lubricants or stainless steel materials may be required.

Frequently Asked Questions (FAQ)

1. Which Cross Roller Bearing series should I choose: RB, RU, or CRBH?
It depends on your mounting needs. RB series is ideal for high inner-ring rotation accuracy. RU series features integrated rings with mounting holes for the easiest installation and smallest footprint. CRBH series offers high rigidity for both inner and outer ring rotation. At UKL, we provide technical drawings for all series to ensure the perfect fit for your design.

2. Can one Cross Roller Bearing replace multiple traditional bearings?
Yes. Due to the V-raceway design, a single Cross Roller Bearing handles radial, axial, and moment loads simultaneously. This allows you to replace a dual-bearing setup, reducing space, weight, and assembly costs while maintaining superior rigidity.

3. How does UKL guarantee P4 or P2 precision grades?
We control the entire process in-house at our Wuxi factory—from forging and specialized heat treatment to CNC precision grinding. Every bearing undergoes 100% inspection for noise, vibration, and clearance using advanced testing instruments, ensuring we meet the exceptionally high demands of global industries.

4. Do you offer customization for non-standard applications?
With 15 years of OEM/ODM experience, customization is our strength. Whether you need specific dimensions, stainless steel materials, or specialized lubricants for vacuum or high-temperature environments, UKL provides tailored R&D and manufacturing to meet your exact specifications.

5. What is the typical lead time for international orders?
Standard models are often in stock and ready to ship within 7-10 days. For customized or large-scale production, our integrated supply chain typically delivers within 30-45 days. We prioritize quick response times to support our clients across Europe, Asia, and the Middle East.