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CRBF Crossed Roller Bearings

CRBF Crossed Roller Bearing with compact integrated design
CRBF Crossed Roller Bearings feature an integrated structure of inner and outer rings, significantly reducing installation time and errors. These bearings provide high rotation accuracy, ideal for limited-space environments requiring both rigidity and precision. The thin section design makes them well-suited for robots, measuring instruments, and rotary tables.
Total 28 Results
Part Number
Size
Seal Type
Bore Dia
Outer Dia
Width
Inner Ring PCD1
Outer Ring PCD2
Inner Ring Mounting Hole
Outer Ring Mounting Hole
Basic Load Rating C
Basic Load Rating Co
Weight
CRBFV108AT
10 mm x 52 mm x 8 mm
Open
10 mm
52 mm
8 mm
16 mm
42 mm
4-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
2.91 kN
2.43 kN
0.12 Kg
CRBFV108ATUU
10 mm x 52 mm x 8 mm
Double Seal
10 mm
52 mm
8 mm
16 mm
42 mm
4-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
2.91 kN
2.43 kN
0.12 Kg
CRBFV2012AT
20 mm x 70 mm x 12 mm
Open
20 mm
70 mm
12 mm
28 mm
57 mm
6-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
7.35 kN
8.35 kN
0.29 Kg
CRBFV2012ATUU
20 mm x 70 mm x 12 mm
Double Seal
20 mm
70 mm
12 mm
28 mm
57 mm
6-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
7.35 kN
8.35 kN
0.31 Kg
CRBFV2512AT
25 mm x 80 mm x 12 mm
Open
25 mm
80 mm
12 mm
35 mm
67 mm
6-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
8.61 kN
10.6 kN
0.4 Kg
CRBFV2512ATUU
25 mm x 80 mm x 12 mm
Double Seal
25 mm
80 mm
12 mm
35 mm
67 mm
6-M3 through
6-φ3.4 through φ6.5 counter bore depth 3.3
8.61 kN
10.6 kN
0.4 Kg
CRBFV3515AT
35 mm x 95 mm x 15 mm
Open
35 mm
95 mm
15 mm
45 mm
83 mm
8-M4 through
8-φ4.5 through φ8 counter bore depth 4.4
17.5 kN
22.3 kN
0.62 Kg
CRBFV3515ATUU
35 mm x 95 mm x 15 mm
Double Seal
35 mm
95 mm
15 mm
45 mm
83 mm
8-M4 through
8-φ4.5 through φ8 counter bore depth 4.4
17.5 kN
22.3 kN
0.62 Kg
CRBFV5515AT
55 mm x 120 mm x 15 mm
Open
55 mm
120 mm
15 mm
65 mm
105 mm
8-M5 through
8-φ5.5 through φ9.5 counter bore depth 5.4
20.3 kN
29.5 kN
1 Kg
CRBFV5515ATUU
55 mm x 120 mm x 15 mm
Double Seal
55 mm
120 mm
15 mm
65 mm
105 mm
8-M5 through
8-φ5.5 through φ9.5 counter bore depth 5.4
20.3 kN
29.5 kN
1 Kg
CRBFV8022A
80 mm x 165 mm x 22 mm
Open
80 mm
165 mm
22 mm
97 mm
148 mm
10- φ 5.5 through φ 9.5 counter bore depth 5.4
10-φ5.5 through φ9.5 counter bore depth 5.4
51.1 kN
72 kN
2.6 Kg
CRBFV8022AD
80 mm x 165 mm x 22 mm
Open
80 mm
165 mm
22 mm
97 mm
148 mm
10- φ 5.5 through φ 9.5 counter bore depth 5.4
10-φ5.5 through φ9.5 counter bore depth 5.4
51.1 kN
72 kN
2.6 Kg
CRBFV8022ADUU
80 mm x 165 mm x 22 mm
Double Seal
80 mm
165 mm
22 mm
97 mm
148 mm
10- φ 5.5 through φ 9.5 counter bore depth 5.4
10-φ5.5 through φ9.5 counter bore depth 5.4
51.1 kN
72 kN
2.6 Kg
CRBFV8022AT
80 mm x 165 mm x 22 mm
Open
80 mm
165 mm
22 mm
97 mm
148 mm
10-M5 through
10-φ5.5 through φ9.5 counter bore depth 5.4
33.1 kN
50.9 kN
2.6 Kg
1 / 2
A cutaway diagram illustrating the internal structure of a CRBF crossed roller bearing, showing the crossed rollers and integrated mounting holes.

The Unique Structure of CRBF Bearings

CRBF Crossed Roller Bearings stand out due to their unique, space-saving structure. Unlike traditional bearings, the CRBF series has an integrated design. The inner and outer rings are solid, with precision-drilled mounting holes. This eliminates the need for separate flanges or support rings, which simplifies the surrounding machine structure.
 
The arrangement of the cylindrical rollers at a 90-degree angle allows this single bearing to handle radial, axial, and moment loads simultaneously. This is a significant advantage over conventional ball bearings, which often require multiple bearings to manage similar loads. This compact design is what makes CRBF bearings a top choice for robot bearings and other applications where space is at a premium.

CRBF Bearing Applications and Benefits

The design of CRBF Crossed Roller Bearings makes them highly versatile for various applications that demand high precision and rigidity. They are frequently used in precision rotary tables, especially for machine tools and measuring instruments. Their ability to handle heavy and complex loads from all directions makes them ideal for industrial robot bearings.
 
In the field of medical equipment and automation, these bearings provide the stability and accuracy needed for precise movements. The main benefit is the ability to achieve a rigid, compact, and highly precise bearing solution with a single component. This not only simplifies machine design but also reduces assembly time and costs.
A diagram comparing a CRBF crossed roller bearing with other types of crossed roller bearings.

Comparison: CRBF vs. Other Crossed Roller Bearings

While all crossed roller bearings share the fundamental principle of crossed cylindrical rollers, the CRBF series has its own unique characteristics. For example, the RU Crossed Roller Bearings and RA Crossed Roller Bearings are also popular, but they have different mounting configurations.
 
The CRBF series is specifically designed for applications where the bearing needs to be mounted directly to the machine structure without the need for additional housing or support rings. This is in contrast to bearings like the RB Crossed Roller Bearings, which require a separate housing. The integrated mounting holes in the CRBF series provide a clean, space-saving solution that is particularly beneficial for compact designs and high-speed applications where minimal eccentricity is critical.

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FREQUENTLY ASKED QUESTIONS

What are the main applications of CRBF Crossed Roller Bearings?

CRBF bearings are ideal for applications that require compact size, high rigidity, and excellent rotational accuracy. Common industries include industrial automation, robotics, aerospace, and precision optical systems. They are often found in robotic joints, rotary indexing tables, satellite antennas, and CT scanning equipment, where motion control is critical.

How does CRBF differ from RB or RU type crossed roller bearings?

Unlike RB and RU types, which may require more complex housing or have thicker outer rings, CRBF bearings feature an integrated structure with a slim profile. This makes them easier to install and better suited for compact spaces. Additionally, CRBF bearings reduce the risk of misalignment and require less adjustment during assembly, offering better consistency in high-volume production lines.

Are CRBF bearings suitable for high-speed or dynamic applications?

While CRBF Crossed Roller Bearings are not primarily designed for high-speed rotation, their low friction and precise roller alignment allow moderate-speed dynamic use. They are ideal for systems where precision is more critical than speed, such as measurement and inspection systems, laser equipment, and surgical machinery. Proper lubrication and preload adjustment are key to optimizing their performance in dynamic applications.

What maintenance is required for CRBF Crossed Roller Bearings?

CRBF bearings are designed for low-maintenance operation. However, periodic checks of preload, lubrication condition, and cleanliness are essential to ensure long life and consistent performance. Depending on the working environment, it's recommended to use cleanroom-compatible grease or oil. In dusty or high-vibration environments, protective sealing and regular inspections are necessary to prevent premature wear.
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