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.

 

 


 

 

 

 

 

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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)

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Request Sample

Customization:
Available

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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

How do cross roller bearings improve the functionality of industrial machinery like CNC machines?

Cross roller bearings play a significant role in improving the functionality of industrial machinery, particularly CNC (Computer Numerical Control) machines. These precision bearings offer several advantages that enhance the performance and capabilities of CNC machines:

  • Precision Positioning:
  • Cross roller bearings are known for their exceptional positioning accuracy. They have a unique design that allows for point contact between the rollers and raceways, resulting in minimal elastic deformation and reduced clearance. This enables CNC machines to achieve highly precise positioning and motion control. The low friction characteristics of cross roller bearings also contribute to smoother and more accurate movements, ensuring precise machining and tight tolerances.

  • Rigidity and Stability:
  • Cross roller bearings exhibit high rigidity and stability due to their compact design and the elimination of clearance. This is crucial in CNC machines, where maintaining stability and rigidity during machining operations is essential. The high rigidity of cross roller bearings helps minimize vibrations, deflections, and deformations, ensuring precise and repeatable machining results. It enhances the overall stability of the machine, enabling it to handle high cutting forces and maintain dimensional accuracy even during heavy-duty operations.

  • Load Capacity:
  • Cross roller bearings have a unique structure that allows them to support high loads in all directions, including radial, axial, and moment loads. This makes them suitable for handling the heavy loads encountered in CNC machines. The ability of cross roller bearings to distribute and carry loads evenly helps prevent premature wear and prolong the service life of the machine. It also allows CNC machines to handle a wide range of machining tasks, from light-duty precision work to heavy-duty milling and cutting operations.

  • Compact Design:
  • Cross roller bearings have a compact and space-saving design. This is advantageous in CNC machines, where space can be limited, especially in multi-axis configurations. The compact design of cross roller bearings allows for efficient use of available space, enabling CNC machines to have a smaller footprint while maintaining high functionality and performance. It also facilitates easier integration of the bearings into the machine structure, simplifying assembly and reducing overall weight.

  • High-Speed Capability:
  • Cross roller bearings are capable of operating at high speeds due to their low friction characteristics and optimized design. This is crucial in CNC machines, where high-speed machining and rapid positioning are often required to improve productivity. The low friction of cross roller bearings minimizes heat generation and allows for smooth and efficient operation at high rotational speeds. It ensures that CNC machines can achieve fast and accurate movements, reducing cycle times and increasing overall machining efficiency.

  • Long Service Life:
  • The robust construction and high-quality materials used in cross roller bearings contribute to their long service life. CNC machines often operate in demanding environments and undergo continuous use. The durability and reliability of cross roller bearings help minimize downtime and maintenance requirements, ensuring uninterrupted operation of the CNC machine. The extended service life of cross roller bearings also leads to cost savings by reducing the need for frequent bearing replacements.

In summary, cross roller bearings improve the functionality of industrial machinery like CNC machines by providing precision positioning, rigidity and stability, high load capacity, a compact design, high-speed capability, and long service life. These advantages enable CNC machines to achieve highly accurate and repeatable machining, handle heavy loads, operate at high speeds, and maintain stability during demanding operations. By incorporating cross roller bearings into CNC machines, manufacturers can enhance productivity, improve machining quality, and achieve greater efficiency in their manufacturing processes.

cross roller bearing

How does proper lubrication impact the performance and longevity of cross roller bearings?

Proper lubrication plays a crucial role in the performance and longevity of cross roller bearings. It ensures smooth operation, reduces friction and wear, minimizes heat generation, and protects the bearing surfaces. Here's a detailed explanation of how proper lubrication impacts the performance and longevity of cross roller bearings:

  • Reduces Friction and Wear:
  • Lubrication forms a thin film between the rolling elements (rollers) and the raceways of the cross roller bearing. This film reduces direct contact between the surfaces, minimizing friction and wear. By providing a lubricating layer, proper lubrication helps to prevent metal-to-metal contact, which can lead to surface damage and premature failure of the bearing.

  • Minimizes Heat Generation:
  • During operation, cross roller bearings can generate heat due to friction between the rolling elements and the raceways. Proper lubrication helps dissipate this heat by reducing friction. The lubricating film acts as a thermal barrier, carrying away heat from the bearing surfaces. Effective heat dissipation ensures that the bearing operates within the desired temperature range, preventing overheating and potential damage.

  • Prevents Contamination:
  • Lubrication also helps to prevent the ingress of contaminants such as dust, dirt, moisture, and other particles into the bearing. The lubricant forms a protective barrier, sealing the bearing components and preventing external contaminants from entering. Contamination can cause abrasion, corrosion, and accelerated wear, leading to reduced performance and shortened bearing life. Proper lubrication minimizes the risk of contamination and maintains the integrity of the bearing's internal components.

  • Improves Corrosion Resistance:
  • Cross roller bearings are often exposed to various environmental conditions that can lead to corrosion. The right lubricant creates a protective layer on the bearing surfaces, acting as a barrier against moisture and corrosive agents. This helps to prevent corrosion and maintain the structural integrity of the bearing, ensuring its long-term performance and longevity.

  • Enhances Load Distribution:
  • Proper lubrication optimizes the load distribution within the cross roller bearing. The lubricant helps to separate the rolling elements and distribute the applied load evenly across the raceways. This ensures that the bearing can effectively handle radial, axial, and moment loads without excessive stress concentration on specific areas. Improved load distribution minimizes the risk of premature wear, fatigue, and failure under heavy loads.

  • Preserves Precision and Accuracy:
  • Cross roller bearings are often used in applications that require high precision and accuracy. Proper lubrication helps maintain the bearing's precision by reducing friction and minimizing variations in motion. It ensures smooth and consistent operation, allowing the bearing to deliver accurate positioning and motion control. Lubrication also helps to dampen vibration and noise, contributing to improved performance in precision applications.

  • Extends Service Life:
  • By reducing friction, minimizing wear, preventing contamination, and enhancing load distribution, proper lubrication significantly extends the service life of cross roller bearings. The lubricant acts as a protective agent, preserving the integrity of the bearing components and reducing the risk of premature failure. With regular lubrication maintenance, the bearing can achieve its expected operational lifespan, providing reliable performance over an extended period.

In summary, proper lubrication is essential for maximizing the performance and longevity of cross roller bearings. It reduces friction and wear, minimizes heat generation, prevents contamination and corrosion, enhances load distribution, preserves precision and accuracy, and extends the service life of the bearings. Regular lubrication maintenance, using the appropriate lubricant in the correct quantity, is crucial for ensuring optimal performance and reliability of cross roller bearings in various industrial applications.

China manufacturer Crossed Roller Bearing Slewing Bearing Ru66 Crbfv3515at Cylindrical Cross Roller Bearing   bearing airChina manufacturer Crossed Roller Bearing Slewing Bearing Ru66 Crbfv3515at Cylindrical Cross Roller Bearing   bearing air
editor by CX 2024-04-10