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CRBS Crossed Roller Bearings

A close-up of a CRBS ultra-thin wall crossed roller bearing, showing its compact design and roller arrangement, used for a robot joint.
CRBS Crossed Roller Bearings are an ultra-thin wall, high precision bearings with an integrated inner and outer ring design. This unique structure allows them to achieve extreme compactness while maintaining very high rigidity and rotational accuracy. Compared to conventional crossed roller bearings, the CRBS series, with its ultra-thin wall feature, is particularly suited for space-constrained applications with demanding performance requirements, such as robot bearings, high precision bearings, and aerospace bearings. The one-piece inner and outer ring design simplifies installation and ensures outstanding performance.
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Ultra-thin wall structure and integrated ring design of CRBS crossed roller bearings

CRBS: Slim Type Crossed Roller Bearings

The CRBS series features an ultra-thin wall structure, allowing it to fit into compact systems and reduce overall weight. This makes it ideal for robotic joints and compact medical devices.
 
Its integrated inner and outer rings provide higher rigidity and minimize assembly errors. Additionally, a filler plug in the outer ring ensures that rollers stay in place during transport or installation, maintaining consistent precision.

Wide Range of Applications: From Robotics to Precision Manufacturing

Because CRBS Crossed Roller Bearings integrate features like an ultra-thin wall, high rigidity, and high precision, they are widely used in a variety of cutting-edge technological fields. In the robotics industry, the CRBS series is a core component of robot joints and robot arms. Their compact design and high load capacity enable robots to achieve precise and smooth movements, greatly improving the efficiency and flexibility of automated production lines. In the medical equipment sector, CRBS bearings are used in surgical robots and medical imaging devices, where their high precision ensures the accuracy and safety of operations.

In addition to robotics and medical equipment, the CRBS series is also commonly used in various precision instruments, such as optical and measuring devices. Their stability and high precision are crucial for ensuring the reliability of measurement results. Furthermore, in the aerospace field, where lightweight design is paramount, CRBS is an ideal choice for aerospace bearings. They are used in satellite solar panel deployment mechanisms and space station mechanical arms, providing reliable rotational support for these critical systems.

A collage showing applications of CRBS bearings in different scenarios, such as a robot arm, medical equipment, and a satellite.

Installation Tips and Best Practices

When installing CRBS Crossed Roller Bearings, it is critical to maintain a clean and controlled working environment. All contact surfaces, including shafts, housings, and surrounding components, should be thoroughly cleaned and inspected before installation. Remove any dust, oil, or debris to prevent contamination that could impair the bearing’s performance or shorten its service life.

During installation, ensure accurate alignment of both the inner and outer rings. Proper concentricity and parallelism are vital to avoid uneven load distribution and ensure smooth, high-precision rotation. Misalignment can cause abnormal noise, increased torque, and premature wear.

For CRBS types with filler plugs, double-check that the plug is properly positioned and securely fixed. This ensures that the cross-arranged cylindrical rollers remain accurately aligned during operation and that the bearing retains its high rotational precision.

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FREQUENTLY ASKED QUESTIONS

What is the main difference between CRBS and other types of crossed roller bearings?

The most significant features of the CRBS series are its "ultra-thin wall" and "integrated inner and outer ring" design. Compared to other crossed roller bearings like the RB or RA series, the CRBS series has thinner rings and is lighter. Its one-piece inner and outer rings also simplify installation, as no fixing flanges or clamping covers are required. This makes them especially suitable for robot bearings and precision instruments where space and weight are critical factors.

What are the specific applications of CRBS crossed roller bearings in robotics?

In the field of robotics, the CRBS series are ideal robot bearings. They are widely used in robot joints, the rotating bases of robotic arms, and end effectors. Due to their compact size and high load capacity, CRBS bearings provide smooth, precise rotational motion for robots, ensuring the accuracy and repeatability of their movements. This is essential for automated assembly and handling tasks.

Why is the CRBS series considered a "high precision" bearing?

The CRBS series is classified as high precision bearings due to its unique design and manufacturing processes. First, the rollers are arranged at a 90-degree angle, which effectively eliminates clearance and provides extremely high rigidity. Second, the one-piece inner and outer ring design ensures concentricity and axial accuracy after installation. Furthermore, strict manufacturing tolerances and quality control ensure that each bearing has very low rotational runout and vibration, meeting the stringent requirements for motion accuracy in precision instruments and high-end equipment.

What should be noted during the installation of CRBS crossed roller bearings?

Proper installation is crucial for ensuring the performance and longevity of CRBS bearings. Thanks to their integrated design, the installation process is relatively simple. Before installation, ensure that the shaft and housing surfaces are clean and free of contaminants. It is recommended to use professional tools and avoid striking the rollers or cage directly. For models with plugs, confirm that the plug is correctly installed. If in doubt, it is best to consult the manufacturer's installation manual or contact technical support to ensure correct installation.