Crossed Roller Bearings for Robotics & Precision Equipment | BOBI Bearing-Luoyang BOBI Precision Bearing Co., Ltd.

Introduction

Customized Crossed Roller Bearing Solutions

Our crossed roller bearings are engineered with real-world applications in mind, delivering high precision, stability, and long-term reliability.

In today's world of constantly upgrading high-precision equipment, crossed roller bearings are not only a standard component but also a key factor determining equipment performance and stability. When selecting suppliers, customers often focus not only on the product itself but also on manufacturing capabilities, quality control systems, and long-term service support. We consistently design and optimize our products around actual application needs, providing stable and reliable crossed roller bearing solutions to customers worldwide.

Throughout our product development process, we consistently prioritize application scenarios rather than simply providing generic models. Our engineering team provides tailored selection advice and structural optimization solutions based on the customer's equipment structure, load conditions, and operating environment. This application-oriented design approach helps customers avoid potential risks early in the project, thereby reducing later commissioning costs and improving overall system performance.

Different applications have varying requirements for bearing structures. We offer a variety of structural options, including integral, split, and designs with mounting holes, to meet diverse installation needs. For special project requirements, we also support customized services. Our engineering team can optimize the structure and perform non-standard designs based on the technical parameters provided by the customer, ensuring optimal matching between the product and the equipment.

Our crossed roller bearings have been widely used in several demanding industries, including industrial robots, medical devices, semiconductor equipment, and precision instruments. These industries have stringent requirements for precision and stability, which in turn validates the reliability of our products. Long-term customer feedback in these applications provides crucial information for our continuous product optimization.

Key Advantages

Why BOBI Crossed Roller Bearings Stand Out

We combine precision grinding with advanced material science. These attributes ensure your machinery runs with maximum uptime and minimal backlash.

Therefore, crossed roller bearings have the following key advantages:

01
High Load Capacity in All Directions

Crossed roller bearings support radial loads, axial loads, and tilting moments at the same time. The perpendicular arrangement of rollers ensures that force is distributed evenly across the contact surfaces. This feature allows engineers to replace complex bearing combinations with a single unit, improving system efficiency and reducing component count.
02
Exceptional Rotational Accuracy

Crossed roller bearings are designed for high precision. Manufacturers typically apply preloading to eliminate internal clearance, which significantly reduces vibration and backlash. This level of accuracy is essential in applications such as: CNC rotary tables Industrial robots Optical and measurement equipment Stable rotation ensures consistent performance even under dynamic conditions.
03
High Rigidity and Structural Stability

The line contact between rollers and raceways provides greater rigidity compared to ball bearings. This structural advantage allows the bearing to resist deformation under load. High rigidity is particularly important in: Machine tools Semiconductor equipment Precision positioning systems The bearing maintains its shape and alignment, which directly contributes to machining accuracy and repeatability.
04
Compact and Space-Saving Design

Crossed roller bearings offer a compact structure that reduces installation space. Since one bearing can handle multiple load directions, designers can simplify the mechanical layout. This feature is especially valuable in: Robotic arms Medical imaging devices Aerospace systems A smaller footprint helps reduce overall equipment weight while maintaining high performance.
05
Smooth and Low-Friction Operation

The rolling motion of cylindrical rollers minimizes friction compared to sliding contact systems. When properly lubricated, cross roller bearings provide smooth rotation with minimal energy loss. Lower friction leads to: Reduced heat generation Longer service life Improved energy efficiency This makes them suitable for high-speed and continuous operation environments.
06
Easy Installation and Maintenance

Many crossed roller bearings feature split outer rings or integrated mounting holes, which simplify installation and alignment. Designers can directly bolt the bearing onto the housing without complex adjustments. This design reduces assembly time and minimizes the risk of installation errors, which is critical in high-precision systems.
07
Versatile Configuration Options

Manufacturers offer crossed roller bearings in various configurations to meet different application requirements: With or without cage (full complement or spacer type) Sealed or open designs Different preload levels Customized dimensions and materials This flexibility allows engineers to tailor the bearing to specific performance needs.
08
Long Service Life and Reliability

Crossed roller bearings are engineered for durability. High-quality materials, precision machining, and controlled heat treatment processes ensure consistent performance over time. When operated within proper load and lubrication conditions, these bearings deliver: Extended maintenance intervals Reduced downtime Lower total cost of ownership Reliability is a key factor for industries where equipment failure is not acceptable.

Industries and Applications

Industrial Applications of BOBI Crossed Roller Bearings

From tailored selection guidance to custom structural designs, we help optimize performance across robotics, medical, semiconductor, and precision industries while reducing overall operational costs.

More Applications

Industrial Robots and Automated Equipment

In automated assembly lines, precision handling equipment, and collaborative robots, crossed roller bearings ensure smooth operation at high speeds, reducing vibration and noise, thereby improving overall production efficiency.

CNC Machine Tools and Precision Rotary Tables

In high-end five-axis machine tools, crossed roller bearings can effectively withstand complex combined loads, ensuring stable operation under high-speed cutting and heavy-duty machining conditions.

Medical Equipment and Imaging Systems

The compact structure of crossed roller bearings not only helps reduce the size of medical equipment but also improves the patient experience and meets the high standards of safety and reliability required by the medical industry.

Semiconductors and Precision Instruments

Crossed roller bearings can operate stably in clean environments while reducing particle generation, meeting the dual requirements of cleanliness and stability in high-end manufacturing.

Aerospace and Radar Systems

In the aerospace and defense fields, the structure of crossed roller bearings effectively reduces system errors, improves target tracking accuracy, and maintains stable performance during long-term operation.

Industrial Turntables and Testing Equipment

For equipment requiring continuous operation, the durability and reliability of crossed roller bearings can effectively reduce maintenance frequency, thereby reducing enterprise operating costs.

How to Choose

How to Select the Right Crossed Roller Bearing

Choosing the perfect bearing depends on torque, speed, and space constraints. Follow our matrix to match your application with BOBI's specifications.

Load Type & Magnitude

Evaluate combined radial/axial loads. For high-rigidity robotic wrists, opt for full-complement designs like Bobi-CRB series.

Speed & Lubrication

Crossed roller bearings handle moderate rpm. Bobi supplies sealed units pre-filled with lithium grease for life-long lube.

Rotary Accuracy

P2 class provides runout ≤ 2µm, ideal for semiconductor wafer handling. P4 suits general automation.

Environmental Temperature

Standard variants work from -20°C to +80°C; high-temp options with PTFE seals available up to 150°C.

Mounting Space

Use thin-section models (e.g., Bobi-CRB-120) when axial space is limited; choose wider series for heavier payloads.

Corrosion Resistance

Suitable grades for cleanroom or chemical environments, featuring stainless steel rings and non-magnetic options.

Mounting Interface

Choose from plain bore or keyway; Bobi can also machine custom bolt holes per your drawings.

Preload Selection

Bobi offers zero-clearance and slight preload configurations to eliminate backlash in indexing operations.

Next Step

Use our product tables above to find candidate series, then contact our technical team with your specific parameters (d, D/C, loads, speed) for a formal recommendation and life calculation.

Submit Ypur Request

Questions and Answers

Crossed Roller Bearing FAQ

Can Bobi crossed roller bearings replace THK or IKO units?

Yes, Bobi bearings are manufactured to ISO/ABEC equivalent standards. Always verify mounting dimensions – our CRB series is fully interchangeable with common RA/CRB types.
How often should I re-lubricate?

Sealed units are pre-greased for life. For open types, we recommend regreasing every 500 operating hours using lithium soap-based grease NLGI grade 2 or 3.
What tolerance class do you ship as standard?

Standard is P5 (ABEC 5) with P4 and P2 available on request. Each bearing comes with a runout measurement certificate.
Do you offer bearing sets matched for preload?

Absolutely. When ordering multiple bearings for one assembly, we can match them by preload and dimension deviations to ±2µm.
What is the maximum speed for a 100mm bore crossed roller bearing?

With grease lubrication, typical max is 1500 rpm. For higher speeds (up to 3000 rpm), please consult Bobi for oil-mist lubrication options.
Are there installation precautions?

Always press on the ring that fits tightly (usually the inner ring). Use an arbor press and ensure housing perpendicularity better than 0.01mm. Never hammer directly.
What warranty covers Bobi bearings?

We provide 18 months from shipment or 3000 operating hours (whichever arrives first) against material and workmanship defects.

High Precision & Space-Saving Solutions