CRBF crossed roller bearings|Cross Roller Bearings|Precision Bearings|Products|NewBee Transmission

Cross Roller Bearings

CRBF crossed roller bearings

CRBF crossed roller bearings are specifically designed for high-precision, high-speed rotary systems, featuring an integral outer ring, split inner ring, and precision-machined integrated flange with standard mounting holes. The 90° orthogonal "X"-shaped cylindrical rollers enable simultaneous bearing of radial, axial, and moment loads, ensuring excellent stability and rigidity. The flange-integrated design simplifies installation by eliminating the need for additional supports, making them ideal for industrial robots, precision rotary tables, high-speed machining centers, and automation machinery requiring compact structure and reliable high-speed operation.

Features:

Inner Ring: Split structure;

Outer Ring: Integral structure;

Flange: Integrated precision-machined flange with standard mounting holes (eliminates additional supports);

Roller Arrangement:

90° orthogonal "X"-shaped cylindrical rollers (simultaneously bears radial, axial, and moment loads)

Accuracy Classes: Rotational Accuracy: P5, P4, P2

Size:

Metric Series:

Inner Diameter: 10–115 mm;

Outer Diameter: 52–240 mm;

Cross-section Height: 8–28mm;

Materials:

Bearing Rings & Rollers: GCr15 high-carbon chromium steel (surface hardness HRC 60-62) or SUS440C stainless steel (corrosion-resistant);

Cages: Nylon 66 (lightweight, low friction), brass (high strength, high-speed adaptable), or custom composite materials

Sealing Options:

Open Type: Requires regular external lubrication, suitable for clean and high-speed working conditions;

Contact Rubber Seals (UU/U): Dustproof and splash-proof, suitable for complex industrial environments with dust and humidity

Delivery/Customization:

Standard models: 7–15 days;

Customized models (including flange size and hole diameter customization): Negotiated according to design complexity; OEM cooperation and import substitution solutions supported

Contact Expert Get a Quote

Techspecs

Cross Roller Bearing CRBF Series
MODELS		BOUNDARY DIMENSIONS					MOUNTING HOLES MM				MOUNTING DIMENSIONS		BASIC DYNAMIC LOAD RATING	BASIC STATIC LOAD RATING	WEIGHT
MODELS		D	D	B	R1	R2	PCD1	INNER RING	PCD2	OUTER RING	DA	DA	C	co	KG
Open Type	Sealed Type	mm	mm	mm	min	min		Mounting holes		Mounting holes	mm	mm	KN	Kn	KG
NB.CRBF108AT	NB.CRBF108ATUU	10	52	8	0.3	0.3	16	4-M3 through	42	6-φ3.4 throughφ6.5 counter bore depth 3.3	24	31	2.91	2.43	0.12
NB.CRBF2012AT	NB.CRBF2012ATUU	20	70	12	0.3	0.3	28	6-M3 through	57	6-φ3.4 throughφ6.5 counter bore depth 3.3	36.5	48.5	7.6	8.37	0.31
NB.CRBF2512AT	NB.CRBF2512ATUU	25	80	12	0.6	0.6	35	6-M3 through	67	6-φ3.4 throughφ6.5 counter bore depth 3.3	46.5	58.5	7.61	106	0.4
NB.CRBF3515AT	NB.CRBF3515ATUU	35	95	15	0.6	0.6	45	8-M4 through	83	8-Q4.5 throughφ8 counter bore depth 4.4	56	74	17.3	20.9	0.66
NB.CRBF5515AT	NB.CRBF5515ATUU	55	120	15	0.6	0.6	65	8-M5 through	105	8-φ5.5 throughφ9.5 counter bore depth 5.4	76	94	20.1	27.7	0.96
NB.CRBF8022AT	NB.CRBF8022ATUU	80	165	22	0.6	1	97	10-M5 through 10-φ5.5 through φ9.5 counter bore depth 5.4	148	10-5.5 throughqp9.5 counter bore depth 5.4	107	137	51.1	72	2.63
NB.CRBF8022A	NB.CRBF8022AUU	80	165	22	0.6	1	97	10-M5 through 10-φ5.5 through φ9.5 counter bore depth 5.4	148	10-5.5 throughqφ9.5 counter bore depth 5.4	107	137	51.1	72	2.6
NB.CRBF8022AD	NB.CRBF8022ADUU	80	165	22	0.6	1	97	10-M5 through 10-φ5.5 through φ9.5 counter bore depth 5.4	148	10-φ5.5 throughφ9.5 counter bore depth 5.4	107	137	51.1	72	2.6
NB.CRBF9025AT	NB.CRBF9025ATUU	90	210	25	1.5	1.5	112	12-M8 through	187	12-φ9 throughφ14 counter bore depth 12	132	168	73.4	108	4.83
NB.CRBF9025A	NB.CRBF9025AUU	90	210	25	1.5	1.5	112	12-φ9 through φ 14 counter bore depth 12	187	12-φ9 throughφ14 counter bore depth 12	132	168	73.4	108	4.67
NB.CRBF9025AD	NB.CRBF9025ADUU	90	210	25	1.5	1.5	112	12-φ9 through φ14 counter bore depth 12	187	12-p9 throughφ14 counter bore depth 12	132	168	73.4	108	4.67
NB.CRBF11528AT	NB.CRBF11528ATUU	115	240	28	1.5	1.5	139	12-M8 through 12-φ9 through φ 14 counter bore depth 13.5	217	12-p9 throughφ14 counter bore depth 13.5	162	198	84.3	138	6.81
NB.CRBF11528A	NB.CRBF11528AUU	115	240	28	1.5	1.5	139	12-M8 through 12-φ9 through φ14 counter bore depth 13.5	217	12-φ9 throughφ14 counter bore depth 13.5	162	198	84.3	138	6.63
NB.CRBF11528AD	NB.CRBF11528ADUU	115	240	28	1.5	1.5	139	12-M8 through 12-φ9 through φ 14 counter bore depth 13.5	217	12-φ9 throughφ14 counter bore depth 13.5	162	198	84.3	138	6.63

Description

Design Principles: The 90° orthogonal crossed arrangement of rollers forms a symmetrical contact line, evenly distributing radial, axial, and moment loads, avoiding local stress concentration, and improving stability at high speeds. The split inner ring design facilitates precise preload adjustment, while the integral outer ring + integrated flange structure reduces assembly steps, lowers cumulative errors, and enhances system rigidity and rotational accuracy. Performance Features: Flange Integration: Equipped with standard mounting holes, eliminating the need for additional supports, significantly simplifying the installation process and saving assembly space. High-Speed Adaptability: Optimized roller and cage design, with a maximum speed of 2800 rpm under grease lubrication and 3500 rpm under oil lubrication. High Rigidity and Precision: P2-class precision meets micron-level positioning requirements, and the crossed roller layout enhances deformation resistance by more than 3 times. Long Service Life and Stability: Surface hardening treatment of GCr15 material, precision polishing of roller end faces (Ra≤0.1μm), and fatigue life increased by 30%. Customization Options: Supports non-standard size customization, flange specification customization, hybrid design with ceramic rollers, corrosion-resistant material (SUS440C), and special lubrication solutions for high-temperature/vacuum environments.

Features

Convenient and Efficient Installation

The integrated flange design eliminates the need for additional flange seats, enabling direct fixation via mounting holes, which shortens the assembly cycle and reduces installation costs.

High Speed and High Rigidity

Meets ultra-high-speed operation requirements while maintaining ultra-high rigidity, satisfying severe working conditions such as high-speed cutting and precision rotation.

Precise and Stable Operation

P2-class high precision and low-friction design ensure micron-level positioning accuracy and stable rotational torque, reducing equipment operation errors.

Preferred Import Substitute

All technical indicators meet world-class standards, with stable supply and cost-effectiveness far exceeding that of imported products, lowering procurement costs.

Wide Application Adaptability

Compatible with various environments including clean, high-temperature, and humid conditions, supports non-standard customization, and adapts to the needs of multiple fields such as robotics, machine tools, and aerospace.

Working Principle

Roller Arrangement and Load Distribution: The rollers are arranged in a 90° orthogonal crossed pattern, forming "X"-shaped contact lines that evenly distribute radial, axial, and moment loads to each roller, avoiding local stress overload. Under high-speed operating conditions, the symmetrical distribution of contact lines effectively balances centrifugal forces, ensuring operational stability. Moment loads are transmitted through diagonal rollers, further improving load-bearing efficiency. Lubrication and Sealing: Sealing Protection: Double contact seals (UU/U) effectively block dust and liquid intrusion, adapting to complex industrial environments; the open-type design reduces resistance during high-speed operation, meeting the requirements of clean and high-speed scenarios. Thermal Management: Precision polishing of roller end faces and low-friction cage design effectively control operating temperature rise (typical temperature rise ≤13°C). Combined with the thermal conductivity of high-quality steel, it ensures the thermal stability of precision equipment under high-speed operation. Installation Compatibility: The integrated flange structure is compatible with standard mounting holes and can be directly fixed with bolts, simplifying the installation process. The split inner ring design allows precise control of preload by adding or removing adjustment shims. It is compatible with standard interference fits (shaft h6/housing bore H7) and meets the assembly tolerance requirements of most industrial equipment.

Application & Case

1. Robotics (Industrial & Collaborative Robots)

Robot arm joints (elbow, wrist, shoulder)

End-effector rotation units

Harmonic-drive input/output support
CRBF bearings’ bolt-through mounting and high moment stiffness reduce assembly thickness and improve robot precision.

2. Precision Rotary Tables

CNC indexing tables

Precision positioning rotaries

Laser processing rotary units
Since CRBF bearings mount directly to plates, they simplify rotary table design and deliver high rigidity + high accuracy.

3. Semiconductor Manufacturing Equipment

Wafer aligners

Inspection and lithography stages

Fine-positioning rotary actuators
Semiconductor systems rely on the bearings’ ultra-smooth rotation, low friction, and stable torque.

4. Medical Equipment

CT/MRI scanning components

Robotic surgical arms

High-precision positioning systems
Medical devices benefit from compact size, quiet operation, and repeatability.

5. Aerospace & Defense

Gimbal systems for UAVs, satellites, and targeting optics

Radar rotation mechanisms

Lightweight stabilization platforms
CRBF bearings offer low profile, high stiffness, and excellent resistance to combined loads.

6. Machine Tool Attachments

Tool changers

Probe heads

Small precision spindles
Their rigidity and accuracy improve machining precision where rotation accuracy matters.

7. Optical Systems

Telescope mounts

Laser beam steering

Pan-tilt units
CRBF bearings maintain alignment under small moment loads, preventing optical drift.

8. Automation & Inspection Systems

Positioning arms

Vision-inspection rotary units

Sorting/packaging rotary actuators
The integrated mounting holes greatly simplify assembly and reduce cost.

9. Light Slewing & Compact Turntables

Compact slewing mechanisms

Panoramic camera heads

Light industrial turntables
You get slewing-ring functionality with much higher precision in a smaller form factor.

RU Crossed Roller Bearings Help US Machine Tool Customer Enhance Rotational Precision

LCQJS/XCQJS Series Three-Point Contact Ball Bearings for Aero-Engines

ZARN70130-TN Ball Screw Support Bearings

KG200X/KG350X Specialized Bearings for Semiconductor Wafer Thinning Machines

FAQ

What is the core difference between CRBF type and CRBH type crossed roller bearings?

The CRBF type features an integral outer ring, split inner ring, and integrated flange design, which is easy to install without additional supports and suitable for high speeds; the CRBH type adopts an integral inner and outer ring ultra-thin design, focusing on compact space adaptation. The selection depends on the installation method, speed requirements and space conditions.

Which scenarios are the high-speed advantages of CRBF type bearings suitable for?

It is suitable for scenarios that require both high speed and high precision, such as high-speed CNC rotary tables, high-speed wafer transfer robots, and high-speed grinding machine spindles. The maximum speed can reach 2800 rpm with grease lubrication and 3500 rpm with oil lubrication.

What is the delivery time for non-standard sizes and flange customization?

Usually 6-10 weeks. Specifically, it needs to be determined according to the design complexity, material supply and production schedule. Urgent production services are supported to meet the needs of emergency projects.

How to select the model for high-temperature or corrosive environments?

For high-temperature environments, high-temperature special grease and GCr15 material should be selected; for corrosive environments, SUS440C stainless steel material, corrosion-resistant grease and UU/U sealing type should be selected to ensure the service life and stability of the bearing.

CNC Machinery

Precision Bearings

Non-standard Machinery Parts

Contact Info

Follow Us