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What is the RA-type crossed roller bearing?

The RA-type crossed roller bearing (RA cross roller bearing) is a high-precision rolling bearing. Its rollers are arranged orthogonally at 90°, and the inner ring adopts an integrated structure. It can bear radial loads, axial loads and overturning moments at the same time, and is a core component of precision transmission systems. NewBee Transmission's RA cross roller bearing, with its ultra-thin section design, greatly reduces the installation space while ensuring high rigidity, and is widely used in equipment with strict requirements on precision and compactness.

Features of the RA-type crossed roller bearing

1.Strong composite load-bearing capacity: The orthogonal roller layout of the RA cross roller bearing can simultaneously bear radial, axial and moment loads, eliminating the need to combine other bearings and simplifying the equipment structure.

2.Ultra-high rigidity: The large-area contact design between the rollers and the raceway reduces deformation. NewBee Transmission's RA cross roller bearing undergoes surface hardening treatment (HRC 60-62), resulting in better fatigue resistance.

3. Precise rotation performance: The rotation accuracy of the RA cross roller bearing reaches P4/P2 grade, with radial runout ≤ 0.002mm, suitable for high-precision positioning scenarios.

4.Long service life design: Using GCr15 high-carbon chromium steel or 440C stainless steel as the base material, NewBee Transmission's RA cross roller bearing extends its service life through homogeneous materials and precision grinding processes. 5. Convenient installation: The integrated inner ring design of the RA cross roller bearing reduces cumulative assembly errors, and optional preload configuration eliminates gaps, improving system stability.

Applications of the RA-type crossed roller bearing

With its advantages of high precision and composite load-bearing, the RA cross roller bearing is widely used in the following fields:

Industrial robots: Robot joints and harmonic reducer supports. The RA cross roller bearing ensures the accuracy of the arm rotation.

Precision machine tools: Rotating axes of five-axis machining centers and CNC turntables. The RA cross roller bearing meets the rigidity requirements of high-speed cutting.

Medical equipment: Rotating frames of CT scanners and driving units of surgical robots. The low-vibration characteristic of the RA cross roller bearing ensures imaging accuracy.

Optical instruments: Rotating platforms of laser cutting machines and equatorial mounts of astronomical telescopes. The RA cross roller bearing supports nanoscale positioning.

Semiconductor manufacturing: Wafer handling robotic arms and alignment mechanisms of lithography machines. The RA cross roller bearing is suitable for clean room environments.

Factors affecting the price of the RA-type crossed roller bearing

The price of the RA cross roller bearing is affected by many factors:

1. Material selection: The price of the RA cross roller bearing made of 440C stainless steel is 20%-30% higher than that of the standard GCr15 steel, which is suitable for corrosive environments.

2.Precision grade: Due to the high processing difficulty, the price of the P2 grade RA cross roller bearing is 15%-25% higher than that of the P4 grade.

3.Specification and size: The price of the RA cross roller bearing with an inner diameter of 50-100mm is relatively low, while the price of those with an inner diameter > 150mm or custom sizes increases with the processing cost.

4.Customization requirements: The price of the RA cross roller bearing with special grease (for high temperature/vacuum use) and ceramic rollers increases by 10%-20%. For the specific model price of the RA cross roller bearing, you can contact NewBee Transmission for the latest quotation.

What factors need to be considered when purchasing the RA-type crossed roller bearing

1. Size matching: Accurately measure the inner diameter (d), outer diameter (D) and width (B) of the RA cross roller bearing. NewBee Transmission provides RA series with inner diameters ranging from 50mm to 200mm, suitable for different equipment.

2. Precision requirements: For high-precision scenarios (such as semiconductor equipment), choose P2 grade RA cross roller bearing; for general industrial scenarios, P4 grade is sufficient.

3. Environmental adaptation: For humid environments, give priority to 440C stainless steel RA cross roller bearing; for vacuum environments, custom degassing treatment versions are required.

4. Supplier qualifications: Choose a supplier like NewBee Transmission that can provide material certificates and technical support to ensure the reliability of the RA cross roller bearing.

5.Price rationality: Compare the prices of RA cross roller bearings from different suppliers. NewBee Transmission's factory direct supply model can reduce procurement costs.

A high-quality supplier of RA-type crossed roller bearings

NewBee Transmission is a professional manufacturer of RA cross roller bearings. Having been engaged in the field of crossed roller bearings for many years, its RA series products cover inner diameters from 50mm to 200mm and section heights from 8mm to 13mm, and can be customized with ceramic rollers, special lubrication and other solutions according to needs. Relying on advanced precision grinding equipment and ISO9001 quality system, NewBee Transmission's RA cross roller bearings have passed strict inspections and are widely used in robotics, medical treatment, semiconductors and other fields. For detailed parameters or prices of RA cross roller bearings, you can contact us directly.

Precautions for using the RA-type crossed roller bearing

1. When installing the RA cross roller bearing, use special tools to evenly apply pressure to the inner ring to avoid raceway deformation caused by knocking.

2. Inject an appropriate amount of grease before operation (the filling amount is 1/3-1/2 of the internal space). For high-temperature scenarios, it is recommended to use Krytox® long-acting grease.

3. Regularly check the temperature (normal ≤ 70℃) and vibration value of the RA cross roller bearing. Stop the machine for inspection in case of abnormalities to prolong its service life.

For the latest price, customization plans or technical data of the RA cross roller bearing, please contact NewBee Transmission:

Email: paul@newbeetrans.com

Official website: www.newbeetrans.com