Product Description

Precision Cross Roller Bearing, the inner structure of which adopts the vertical and cross arrangement of cylindrical rollers with 90°, can bear radial load, double-direction thrust loads and overturning moment at the same time. Combined with its high rigidity, it can be applied to the joints and rotating parts of industrial robots, rotary tables of machining centers, rotating parts of manipulators, precision rotary tables, medical equipments, measuring instruments, IC manufacturing machines, etc.

Precision Cross Roller Bearing has 3 structure types, including bearing   with cage, with separator, and with full complement. Cage and separator types are suitable to low friction moment and high-speed rotation, while full complement is suitable to low-speed rotation and heavy load.
Precision Cross Roller Bearing has the following 7 structure series:

 RB Series
 RE Series
 RU Series
 RA Series
 RA-C Series
 CRB Series
 CRBH Series

 

Packing

A. plastic box & outer carton & pallets
B. plastic bag & box & carton & pallet
C. tube package & middle box & carton & pallet
D. Depends on your needs

Delivery

A. Most orders will be shipped within 3-5 days of payment being received.
B. Samples will be shipped by cov2urier as FedEx,UPS,DHL,etc.

Thank you very much for taking time to view our company's website. If you are interested in this product, please feel free to contact us. We are always here.
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Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small and Medium-Sized (60-115mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Axial Bearing
Customization:
Available

|

Customized Request

cross roller bearing

What are the challenges and solutions for managing complex loads and rotational accuracy in cross roller bearings?

Managing complex loads and maintaining rotational accuracy are crucial challenges in cross roller bearings. These bearings often encounter demanding operating conditions that require effective solutions to ensure optimal performance.

  • Challenges:
  • 1. Complex Loads: Cross roller bearings may experience a combination of radial, axial, and moment loads. These loads can vary in magnitude, direction, and frequency, posing challenges in distributing the loads evenly across the bearing structure and minimizing stress concentrations.

    2. Rotational Accuracy: Maintaining precise rotational accuracy is essential in applications where accurate positioning, motion control, and alignment are critical. Factors such as manufacturing tolerances, bearing clearance, and external disturbances can affect the rotational accuracy of cross roller bearings.

  • Solutions:
  • 1. Optimized Bearing Design: Cross roller bearings are designed with specific load capacities and rigidity to handle complex loads. Manufacturers optimize the bearing's internal geometry, material selection, and heat treatment processes to enhance load distribution and minimize stress concentrations. This enables the bearing to withstand varying loads and maintain structural integrity.

    2. Precision Manufacturing: Achieving high rotational accuracy starts with precision manufacturing processes. Tight manufacturing tolerances and stringent quality control measures help ensure consistent dimensions and geometries of the bearing components. This minimizes variations and deviations that can impact rotational accuracy.

    3. Preload and Clearance Adjustment: Proper preload and clearance adjustment are crucial for managing complex loads and maintaining rotational accuracy. Preload, achieved through controlled axial displacement or the use of spacers, eliminates internal clearance and enhances rigidity, reducing the effects of external forces. Careful adjustment of clearance ensures smooth operation while minimizing excessive play and maintaining accuracy.

    4. Lubrication: Lubrication plays a vital role in managing complex loads and rotational accuracy. Appropriate lubrication reduces friction, minimizes wear, and dissipates heat generated during operation. The selection of the right lubricant, based on operating conditions and load requirements, ensures smooth rotation and helps maintain accuracy over extended periods.

    5. Sealing and Contamination Control: Proper sealing and contamination control measures are essential for protecting cross roller bearings from external contaminants such as dust, dirt, and moisture. Seals and shields prevent ingress of harmful particles, maintaining the integrity of the bearing surfaces and minimizing wear that can affect rotational accuracy.

    6. Mounting and Alignment: Accurate mounting and alignment of cross roller bearings are critical for achieving optimal performance. Careful attention should be given to the mounting surfaces, ensuring flatness and perpendicularity, to minimize misalignment and stress concentrations that can impact load distribution and rotational accuracy.

In summary, managing complex loads and rotational accuracy in cross roller bearings requires optimized bearing design, precision manufacturing, proper preload and clearance adjustment, appropriate lubrication, sealing and contamination control, as well as accurate mounting and alignment. By addressing these challenges and implementing effective solutions, cross roller bearings can deliver reliable and precise performance in a wide range of applications.

cross roller bearing

Can you explain the role of preloading in optimizing the performance of cross roller bearings?

Preloading plays a crucial role in optimizing the performance of cross roller bearings. It involves applying a controlled axial force to the bearing to eliminate internal clearance and ensure proper contact between the rolling elements and raceways. Preloading offers several benefits that enhance the performance of cross roller bearings:

  • Increased Stiffness:
  • Preloading significantly increases the stiffness of the bearing system. By eliminating internal clearance, it minimizes the play or deflection between the rolling elements and raceways. This increased stiffness improves the rigidity of the bearing, allowing it to resist deformations and maintain precise positioning and alignment. The increased stiffness is particularly advantageous in applications that require high precision and stability, such as machine tools or robotic systems.

  • Reduced Elastic Deformation:
  • Preloading helps reduce elastic deformation within the bearing under load. When a load is applied to a bearing, elastic deformation can occur, resulting in a temporary change in the internal clearance. This can lead to inaccuracies in positioning and decreased performance. By applying preloading, the bearing is already under some initial load, reducing the elastic deformation when additional loads are applied. This minimizes the change in internal clearance, enhancing the accuracy and repeatability of the bearing system.

  • Improved Axial and Radial Stiffness:
  • Preloading enhances both the axial and radial stiffness of cross roller bearings. It improves the resistance to both axial and radial loads, ensuring better load distribution and load-carrying capacity. The increased stiffness helps to maintain the integrity of the bearing structure and minimize deflections or deformations, even under high loads or dynamic operating conditions. This results in improved performance, reduced vibration, and enhanced overall system stability.

  • Elimination of Clearance-Related Issues:
  • Preloading eliminates clearance-related issues that can affect the performance of cross roller bearings. Internal clearance in bearings can lead to backlash, which is undesirable in applications requiring precise motion control. Backlash can result in inaccuracies, positioning errors, and reduced responsiveness. By applying preloading, the clearance is eliminated, ensuring immediate and precise response to input forces or motion commands. This is crucial in applications such as robotics, where precise positioning and control are critical.

  • Enhanced System Rigidity:
  • By optimizing the stiffness and eliminating clearance, preloading enhances the overall rigidity of the bearing system. This increased rigidity improves the system's ability to resist external disturbances, such as vibrations or shocks. It helps maintain the desired positioning and alignment of components, ensuring stability and accuracy. The enhanced system rigidity contributes to improved overall performance and reliability of the application.

  • Compensation for Wear:
  • Over time, normal wear and tear can lead to a slight increase in internal clearance in bearings. By applying preloading, the initial clearance is reduced, compensating for any potential wear. This helps to maintain the desired performance and accuracy of the bearing system even as it ages. Preloading can extend the effective service life of cross roller bearings by compensating for wear-related changes in internal clearance.

In summary, preloading plays a vital role in optimizing the performance of cross roller bearings. It increases stiffness, reduces elastic deformation, improves axial and radial stiffness, eliminates clearance-related issues, enhances system rigidity, and compensates for wear. By applying preloading, the bearing system achieves higher precision, better load distribution, improved stability, and increased reliability. It is essential to carefully determine and apply the appropriate preloading force based on the specific application requirements to achieve the desired performance benefits.

cross roller bearing

What are cross roller bearings and how are they used in various industrial applications?

Cross roller bearings are specialized types of roller bearings that utilize cylindrical rollers arranged in a cross configuration between inner and outer rings. This unique design allows for high radial, axial, and moment load capacities while maintaining a compact and space-saving profile. Cross roller bearings are commonly used in various industrial applications where precision, rigidity, and load-carrying capacity are critical. Here's a detailed explanation of cross roller bearings and their uses in different industrial sectors:

  • Robotics and Automation:
  • Cross roller bearings are extensively used in robotics and automation systems. These bearings provide high rigidity and precision, making them suitable for robotic joints, rotary tables, and linear motion systems. They can handle complex loads and moments, enabling smooth and accurate movement in robotic applications. Cross roller bearings are also preferred in industrial automation equipment such as pick-and-place machines, assembly systems, and semiconductor manufacturing equipment.

  • Machine Tools:
  • In machine tool applications, where high precision and rigidity are essential, cross roller bearings find wide usage. They are commonly employed in spindle units, rotary tables, and indexing heads of milling machines, lathes, and grinding machines. Cross roller bearings offer excellent rotational accuracy, enabling superior machining performance and surface finish. Their compact design allows for space optimization, making them suitable for machine tools with limited installation space.

  • Medical and Optical Equipment:
  • Cross roller bearings play a crucial role in medical and optical equipment that requires precise movement and stability. They are used in medical imaging devices, such as CT scanners and MRI machines, where the bearings support rotating components with high accuracy. Cross roller bearings are also found in optical instruments like telescopes, camera lenses, and precision measuring instruments, ensuring smooth rotation and precise positioning of optical components.

  • Aerospace and Defense:
  • In the aerospace and defense sectors, cross roller bearings are utilized in critical applications that demand high load capacity, rigidity, and reliability. They are used in aircraft landing gear systems, missile guidance systems, radar antennas, and satellite communication systems. Cross roller bearings are favored for their ability to accommodate both radial and axial loads, making them suitable for aerospace and defense applications with varying load requirements.

  • Industrial Robotics and Material Handling:
  • Cross roller bearings are integral components in industrial robotics and material handling equipment. They are commonly used in articulated robot arms, linear actuators, and conveyor systems. Cross roller bearings enable precise and smooth motion control, supporting heavy loads and withstanding dynamic forces. Their high stiffness and load capacity enhance the reliability and productivity of industrial robots and material handling systems.

  • Scientific and Research Instruments:
  • Cross roller bearings find applications in various scientific and research instruments that require precise positioning and smooth operation. They are used in electron microscopes, spectrometers, telescopes, and other scientific equipment. Cross roller bearings contribute to the stability and accuracy of these instruments, ensuring precise measurements and observations in research and scientific investigations.

In summary, cross roller bearings are specialized roller bearings that offer high load-carrying capacity, rigidity, and precision. They find diverse applications in industries such as robotics and automation, machine tools, medical and optical equipment, aerospace and defense, industrial robotics and material handling, as well as scientific and research instruments. The unique design and performance characteristics of cross roller bearings make them indispensable in industrial sectors that require precise motion control, high load capacity, and compact form factors.

China best Cross Roller Bearing Re20025 Multiple Load-Bearing High Rigidity Precision Instrument   bearing exampleChina best Cross Roller Bearing Re20025 Multiple Load-Bearing High Rigidity Precision Instrument   bearing example
editor by CX 2024-05-09