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:

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

Technological Process

All the forging will be inspected to ensure there is no defect in the material.

Rough Turning with 2-3mm allowance according to the drawing, at the same time every parts will be inspected to ensure the dimension is satisfy with the drawing requirements.

Finish lathing with 2-5mm allowance according to the drawing, all the parts will be inspected to ensure the dimension is satisfy with the drawing requirements

The tolerance of center diameter shall be 0.05mm, and the holes shall meet the drawing requirements . The holes of each part shall be tested to ensure that they meet the requirements of the drawing.

Quenching will be done on the raceway of the bearing to improve the hardness, CZPT resistance and fatigue strength of the bearing. The hardness will be satisfy with customer's requirements after quenching. after quenching,the outer diameter,ovality will be inspected.

Grinding include rough grinding,regrinding and finished grinding. After each grinding processing, the bearing will be tempered to prevent the deformation and cracking, and release the internal stress to make the material stable,and ensure the processing accuracy, then the next grinding will be done, Top and bottom surface,inner and outer diameter, raceway will be grinded to make the dimension and the precision meet the drawing requirements, every parts will be inspected to ensure all the bearing meet the drawing requirements

100% inspection shall be carried out on each part to ensure the inner diameter, outer diameter, surface and raceway of the bearing ring can satisfy the drawing requirements, and ready for assembly.

 

Final inspection will be done after assembly to ensure all the bearing are 100% qualified.

Typing according to the customer's requirements, or typing our company's brand, and the bearing will be packaged by Plastic film+plywood case, or according to the customer's requirements.

 

 


 

 

 

 

 

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Standard or Nonstandard: Standard
Feature: High Speed, Vacuum, Antimagnetic, Cold-Resistant, Corrosion-Resistant, Heat-Resistant
Sealing Gland: Sealed On One Side
Rolling-Element Number: Single-Row
Material: Bearing Steel
Type: No Gear
Samples:
US$ 10/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

|

Customized Request

cross roller bearing

What are the signs of wear or damage in cross roller bearings, and when should they be replaced?

Identifying signs of wear or damage in cross roller bearings is crucial for ensuring the proper functioning and reliability of machinery. Regular inspection and maintenance can help detect these issues early and prevent potential failures. Here are the common signs of wear or damage in cross roller bearings and guidelines for determining when they should be replaced:

  • Abnormal Noise:
  • Unusual noises such as grinding, clicking, or rumbling sounds during operation can indicate bearing wear or damage. These noises often result from rough or pitted bearing surfaces, insufficient lubrication, or the presence of foreign particles. If abnormal noise is observed, it is advisable to inspect the bearing and consider replacement if necessary.

  • Increased Vibration:
  • An increase in vibration levels during equipment operation can indicate bearing wear or misalignment. Excessive vibration may lead to premature wear of the bearing surfaces and other components. If the vibration levels exceed acceptable limits or show a significant increase compared to normal operation, a thorough inspection should be conducted to determine the cause. If bearing wear or damage is identified as the source, replacement is recommended.

  • Irregular Movement or Stiffness:
  • If the cross roller bearing exhibits irregular movement, stiffness, or resistance during rotation, it may be a sign of wear or damage. This can result from insufficient lubrication, contamination, or excessive internal clearance. Any noticeable change in the smoothness of rotation or resistance to movement should be investigated, and replacement should be considered if the bearing is found to be compromised.

  • Visible Damage:
  • Visual inspection of the cross roller bearing is essential to identify visible signs of damage. These can include chipped or cracked bearing surfaces, excessive wear, corrosion, or deformation. If any visible damage is detected, the bearing should be replaced promptly to prevent further deterioration and potential system failure.

  • Lubrication Issues:
  • Problems related to lubrication can affect the performance and lifespan of cross roller bearings. Insufficient or contaminated lubricant can lead to increased friction, wear, and heat generation. If there are signs of inadequate lubrication (e.g., dry or discolored bearing surfaces) or if contamination is observed (e.g., presence of dirt, debris, or water), the bearing should be inspected, and appropriate measures such as relubrication or replacement should be taken.

  • Operational Conditions:
  • The operational conditions and service life of cross roller bearings vary depending on factors such as load, speed, temperature, and environment. Bearings that are subjected to heavy loads, high speeds, extreme temperatures, or harsh environments may experience accelerated wear or damage. Regular monitoring and periodic replacement based on the manufacturer's recommendations and guidelines for specific operating conditions can help ensure the reliability and longevity of the bearing.

It is important to note that the signs of wear or damage mentioned above are general indicators, and the specific conditions and requirements of each application may vary. Therefore, it is advisable to consult the manufacturer's documentation and guidelines for the cross roller bearing being used to determine the recommended inspection intervals and replacement criteria based on the specific operating conditions.

In summary, signs of wear or damage in cross roller bearings include abnormal noise, increased vibration, irregular movement or stiffness, visible damage, and lubrication issues. The appropriate time for replacement depends on the severity of the wear or damage, as well as the specific operational conditions of the bearing. Regular inspection, adherence to maintenance schedules, and following manufacturer recommendations are crucial for ensuring the optimal performance and longevity of cross roller bearings.

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 factors should be considered when selecting a cross roller bearing for a specific application?

When selecting a cross roller bearing for a specific application, several factors need to be carefully considered. These factors ensure that the chosen bearing meets the requirements of the application in terms of performance, reliability, and longevity. Here are the key factors to consider when selecting a cross roller bearing:

  • Load Requirements:
  • First and foremost, the load requirements of the application must be assessed. Consider the magnitude and direction of the loads, including radial, axial, and moment loads. Determine the maximum load capacity needed and ensure that the selected cross roller bearing can handle the anticipated loads without excessive deflection or premature failure.

  • Precision and Accuracy:
  • If the application requires precise positioning or motion control, the level of required precision and accuracy should be evaluated. Cross roller bearings are known for their excellent rotational accuracy, but the specific requirements of the application should be matched with the bearing's precision level. Consider factors such as the permissible deviation, repeatability, and smoothness of operation.

  • Space Limitations:
  • Assess the available installation space in the application. Cross roller bearings are compact and space-saving, making them suitable for applications with limited space. Measure the dimensions and ensure that the selected bearing can be accommodated without interference or compromising other components.

  • Environmental Conditions:
  • Consider the environmental conditions in which the cross roller bearing will operate. Evaluate factors such as temperature, humidity, dust, chemicals, and potential exposure to contaminants. Choose a bearing that is designed to withstand the specific environmental conditions to ensure optimal performance and longevity.

  • Speed and Acceleration:
  • Assess the required speed and acceleration parameters of the application. Cross roller bearings have speed limitations, and exceeding these limits can lead to increased friction, heat generation, and premature wear. Consider the rotational speed and acceleration requirements and select a bearing that can operate within the desired speed range without compromising performance or reliability.

  • Mounting and Integration:
  • Consider the mounting and integration aspects of the cross roller bearing. Evaluate the mounting method, available space for mounting components, and the overall system design. Ensure that the selected bearing can be easily integrated into the application with appropriate mounting options and compatibility with other system components.

  • Maintenance and Service Life:
  • Assess the maintenance requirements and expected service life of the cross roller bearing. Consider factors such as lubrication needs, accessibility for maintenance, and the desired operating lifespan. Choose a bearing that aligns with the maintenance capabilities and longevity expectations of the application.

  • Cost and Availability:
  • Evaluate the cost-effectiveness and availability of the cross roller bearing. Consider the budget constraints of the application and compare the pricing of different bearing options. Additionally, ensure that the selected bearing is readily available from reliable suppliers to avoid delays or difficulties in sourcing replacements or spare parts.

By carefully considering these factors, it is possible to select the most suitable cross roller bearing for a specific application. Taking into account the load requirements, precision needs, space limitations, environmental conditions, speed and acceleration parameters, mounting considerations, maintenance requirements, and cost-effectiveness ensures that the chosen bearing will deliver optimal performance, reliability, and longevity in the intended application.

China Hot selling High Quality Cross Roller Excavator Slew Ring Slewing Bearing Factory Direct Sales   double row ball bearingChina Hot selling High Quality Cross Roller Excavator Slew Ring Slewing Bearing Factory Direct Sales   double row ball bearing
editor by CX 2024-05-07