CRBTF305A 30X63X5mm Thin Wall Crossed Roller Bearing Compact Hand
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. Key features
include:
- 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.
| Part Number | CRBTF305A |
| Measurement System | Metric |
| Bearing Type | Roller Bearing |
| Roller Bearing Type | Crossed |
| For Load Direction | Combined Load |
| Construction | Single Row |
| Seal Type | Open |
| Bore Diameter | 30 mm |
| Outer Diameter | 63 mm |
| Width | 5 mm |
| Holes | With Holes |
| Ring Material | Steel |
| Roller Material | Steel |
| Basic Dynamic Load Rating(C) | 5040N |
| Basic Static Load Rating (Co) | 4500N |
| Lubrication | Required |
| Shaft Mount Type | Press Fit |
| Temperature Range | 0 -230 °F |
| ABEC Rating | ABEC5/7/9 (P5,P4,P2) |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.20kg |
What's the Performance Features of CRBTF305A Crossed Roller Bearing?
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.
What's the Applications of the CRBTF305A Crossed Roller Bearing?
The CRBTF305A cross roller bearing, with its compact structure, high rigidity, and stable rotational
accuracy, is widely used in the following fields:
1. Robotics
- 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.
2. Radar and Communication Equipment
- 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.
3. Precision Stages and Optical Equipment
- Supports high-precision linear or rotary motion, used in
semiconductor manufacturing equipment, optical alignment platforms,
microscope stages, etc.
4. Medical Devices
- Applied in surgical robots, medical testing equipment (e.g., CT
scanners), and precision instruments, ensuring reliable operation
and meeting sterile environment requirements.
5. CNC Machines and Direct Drive Motors
- 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.
6. Other High-Precision Equipment
- 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.
Technical Advantages
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.
CRB Series (Integrated Inner/Outer Ring Type) Crossed Roller
Bearing
I. Structural Characteristics
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.
II. Performance Advantages
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).
III. Typical Application Scenarios
Application Field | Suitable Equipment Examples | Key Matching Features |
|---|
Industrial Robotics | Joints, rotating parts of robotic arms | Lightweight, high precision, high rigidity |
Medical Equipment | Surgical robots, imaging equipment | Low noise, high rotational accuracy |
Heavy Machinery | Cranes, port equipment | High load capacity, anti-overturning ability |
Semiconductor Manufacturing | Precision rotary tables, IC manufacturing equipment | Ultra-thin structure, high stability |
Bearing Number | Dimensions(mm) | Mounting Size | Basic Load Rating(N) | Inner Ring Mounting Hole | Outer Ring Mounting Hole | Reference
Weight(Kg) |
| Inner Diameter | Outer Diameter | Width | Chamfer | Dynamic | Static | Hole Center | Hole size | Hole Center | Hole size |
| d | D | B | r(min) | da | Da | Cr | Cor | dn | do | Dn | Do | Wt ≈ |
| RJ40 | 8 | 40 | 8 | 0.3 | 26 | 28 | 3020 | 3780 | 20 | 4-M3 | 34 | 6-ф2.8-ф4.6/凵2.8 | 0.06 |
| RU208 | 8 | 44 | 8 | 0.3 | 26 | 32 | 3020 | 3780 | 16 | 4-M3 | 38 | 4-ф3-ф 5/凵3 | 0.08 |
| RU28 | 10 | 52 | 8 | 0.3 | 24 | 29.5 | 2900 | 3400 | 16 | 4-M3 | 42 | 6-ф3.4-ф6.5/凵3.3 | 0.12 |
| RU42 | 20 | 70 | 12 | 0.6 | 37 | 47 | 7350 | 8350 | 28 | 6-M3 | 57 | 6-ф3.4-ф6.5/凵3.3 | 0.29 |
| RU52 | 30 | 80 | 12 | 0.6 | 46.5 | 58.5 | 8610 | 10600 | 35 | 6-M3 | 67 | 6-ф3.4-ф6.5/凵3.3 | 0.40 |
| RU66 | 35 | 95 | 15 | 0.6 | 59 | 74 | 17500 | 22300 | 45 | 8-M4 | 83 | 8-Φ4.5-Φ 8/凵4.3 | 0.62 |
| RU85 | 55 | 120 | 15 | 0.6 | 79 | 93 | 20300 | 29500 | 65 | 8-M5 | 105 | 8-Φ5.5-Φ9.5/凵5.4 | 1.00 |
| RU124 | 80 | 165 | 22 | 1 | 114 | 134 | 33100 | 50900 | 97 | 10-M5 | 148 | 10-Φ5.5-Φ9.5/凵5.4 | 2.60 |
| RU178 | 115 | 240 | 28 | 1.5 | 161 | 195 | 80300 | 13500 | 139 | 12-M8 | 217 | 12-Φ8.6-Φ14/凵8.6 | 6.80 |
| CRBTF105A | 10 | 43 | 5 | 0.15 | 12.5 | 38.5 | 2800 | 2500 | 16 | 6-M2.5 | 35 | 6-ф2.8-ф4.6/凵2.8 | 0.09 |
| CRBTF305A | 30 | 63 | 5 | 0.15 | 33.5 | 58.5 | 5040 | 4500 | 36 | 8-M2.5 | 55 | 8-ф2.8-ф4.6/凵2.8 | 1.20 |
| CRBT305-41A | 30 | 41 | 5 | 0.15 | 33.5 | 36.5 | 3640 | 3250 | - | 0.08 |
| RA5008C | 50 | 66 | 8 | 0.5 | 53.5 | 60.5 | 5100 | 7190 | - | 0.08 |
| RA6008C | 60 | 76 | 8 | 0.5 | 63.5 | 70.5 | 5680 | 8680 | - | 0.09 |
| RA7008C | 70 | 86 | 8 | 0.5 | 73.5 | 80.5 | 5980 | 9800 | - | 0.10 |
| RA8008C | 80 | 96 | 8 | 0.5 | 83.5 | 90.5 | 6370 | 11300 | - | 0.11 |
| RA9008C | 90 | 106 | 8 | 0.5 | 93.5 | 100.5 | 6760 | 12400 | - | 0.12 |
| RA10008C | 100 | 116 | 8 | 0.5 | 103.5 | 110.5 | 7150 | 13900 | - | 0.14 |
| BNAT105 | 10 | 21 | 5 | 0.2 | 12.5 | 18.5 | 1100 | 800 | - | 0.009 |
| BNAT205 | 20 | 31 | 5 | 0.2 | 22.5 | 28.5 | 1500 | 1400 | - | 0.015 |
| BNAT305 | 30 | 41 | 5 | 0.2 | 32.5 | 38.5 | 1900 | 2100 | - | 0.021 |
| BNAT408 | 40 | 56 | 8 | 0.2 | 42.5 | 53.5 | 4200 | 5800 | - | 0.027 |
| BNAT505 | 50 | 61 | 5 | 0.2 | 52.5 | 58.5 | 2400 | 3400 | - | 0.032 |
| BNAT555 | 55 | 66 | 5 | 0.2 | 57.5 | 63.5 | 2500 | 3700 | - | 0.035 |
| BNAT805 | 80 | 91 | 5 | 0.2 | 82.5 | 88.5 | 3000 | 5400 | - | 0.05 |
| BNAT905 | 90 | 101 | 5 | 0.2 | 92.5 | 98.5 | 3100 | 6000 | - | 0.056 |
If you need more detailed information , feel free to ask!
