CRBTF305A 30mm Bore 5mm Width Crossed Roller Bearing High Rigidity Robot Joint Bearing

The CRBTF305A bearing is designed for high-precision rotational motion, featuring crossed cylindrical rollers arranged at right angles to provide exceptional rigidity and load-bearing capacity.

• Outer Diameter: 63 mm
• Bore Diameter: 30 mm
• Width: 5 mm
• Structure: Integrated compact design supporting radial, axial, and moment loads in any direction
• Installation: Simplified by eliminating the need for a mounting flange

The CRBTF305A bearing excels in applications requiring high performance and reliability, offering superior stiffness and load capacity while simplifying installation.

CRBTF305A is a thin-walled cross roller bearing, primarily used in industrial scenarios that demand high precision and lightweight design.

• Lightweight Design: Compared to traditional models, its weight is reduced by approximately 62%, with a cross-section height of only 5 mm, making it suitable for compact space applications
• High Rigidity: The cross-roller structure can withstand axial, radial, and overturning moment loads, offering 3-4 times higher rigidity than traditional bearings
• High Precision: The precision grade can reach P2/P4/P5 levels, making it ideal for precision equipment such as robotic joints, medical instruments, and more

The CRBTF305A cross roller bearing, with its compact structure, high rigidity, and stable rotational accuracy, is widely used in the following fields:

• Industrial Robots: Used in joints, rotating parts, or robotic arms to support high-precision motion control. Suitable for collaborative robots, AGVs, SCARA robots, etc.
• Lightweight Robots: Such as quadruped/hexapod robots, humanoid robots, etc., meeting the demands of compact space and lightweight design.

• Used in radar antenna rotation mechanisms or displacement platforms, ensuring high stability and low-friction operation. Suitable for mobile radar vehicles, satellite communication, and other scenarios.

• Supports high-precision linear or rotary motion, used in semiconductor manufacturing equipment, optical alignment platforms, microscope stages, etc.

• Applied in surgical robots, medical testing equipment (e.g., CT scanners), and precision instruments, ensuring reliable operation and meeting sterile environment requirements.

• Acts as a core component in CNC rotary tables and direct drive motors (DD motors), improving machining accuracy and dynamic response speed. Suitable for five-axis machining centers, mill-turn composite machines, etc.

• Harmonic Reducers/Planetary Reducers: Enhances the rigidity and positioning accuracy of transmission systems.
• Hollow Rotary Platforms: Used for indexing or rotating stations in automated production lines.

The CRBTF305A bearing features an integrated inner and outer ring design with built-in mounting holes, eliminating the need for additional flange support. With a thickness of only 5mm, it is particularly suitable for applications sensitive to space and weight. Its cross-roller arrangement allows it to withstand radial, axial, and moment loads simultaneously, ensuring long-term stable operation.

Split Outer Ring and Integral Inner Ring Design

• The outer ring is divided into two parts, while the inner ring is a single-piece structure, facilitating installation and clearance adjustment
• Features an equal cross-section thin-walled design, with both inner and outer ring thickness minimized to suit compact space applications

Rolling Element Arrangement

• Cylindrical rollers are arranged in a 90° cross pattern, with spacers maintaining their spacing to prevent friction and locking phenomena

• High Load-Carrying Capacity: Capable of simultaneously withstanding radial, axial loads, and overturning moments, making it suitable for heavy-load applications (e.g., cranes, construction machinery)
• High Rigidity and Precision: Offers 3-4 times higher rigidity than traditional bearings, with rotational accuracy reaching P4 and P2 levels, ideal for precision equipment (e.g., CNC machine tools, medical instruments)
• Lightweight and Compactness: Extremely thin walls and reduced weight make it suitable for weight-sensitive applications such as robotic joints and manipulators
• High-Speed Performance: Low-friction design supports high-speed rotation (e.g., DD motors, high-speed indexing tables)