Shaft Diameter 20 mm BNAT205 Crossed Roller Bearing 20X31X5mm
Precision Robot bearing Joints
BNAT205 ,Ultra-Thin Section Type Both the inner and outer rings are of an integral structure. This
series minimizes axial and radial section dimensions to the extreme
(with a minimum section of just 5mm), featuring an ultra-thin
design. It is most suitable for applications requiring lightweight
and compact structures in rotating parts, such as collaborative
robots, service robots, special-purpose robots, and alignment
platforms.. Key features include:
- Outer Diameter: 31 mm
- Bore Diameter: 20 mm
- Width:5mm
The BNAT205 bearing excels in applications requiring high performance and
reliability, offering superior stiffness and load capacity while
simplifying installation.
| Part Number | BNAT205 |
| Measurement System | Metric |
| Bearing Type | Roller Bearing |
| Roller Bearing Type | Crossed |
| For Load Direction | Combined Load |
| Construction | Single Row |
| Seal Type | Open |
| Bore Diameter | 20 mm |
| Outer Diameter | 31 mm |
| Width | 5 mm |
| Holes | With Holes |
| Ring Material | Steel |
| Roller Material | Steel |
| Basic Dynamic Load Rating(C) | 1500N |
| Basic Static Load Rating (Co) | 1400N |
| 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 | 0.015kg |
What's the Performance Features of BNAT205 Crossed Roller Bearing?
- Ultra-Thin Profile: Minimized axial and radial dimensions for compact, space-saving
applications.
- High Precision: Ensures accurate rotation, ideal for robotics and precision
machinery.
- Lightweight: Reduces overall weight, perfect for robotic joints and portable
devices.
- Versatile Load Capacity: Handles radial, axial, and moment loads efficiently.
- Integral Structure: Single-piece inner and outer rings enhance rigidity and stability.
What's the Applications of the BNAT205 Crossed Roller Bearing?
The application areas of the BNAT205 bearing are primarily concentrated in scenarios that demand high
precision, lightweight design, and compact structure. These include
the following fields:
1. Robotics Field
The ultra-thin structure characteristics of the BNAT205 bearing
make it lightweight and compact, making it highly suitable for
various types of robots. For instance, collaborative robots,
service robots, and special-purpose robots often have high
requirements for the weight and size of components to achieve
flexible movement and operation. The BNAT205 bearing meets the
needs of lightweight and compact structures for rotating parts in
robots, ensuring their efficient operation.
2. Alignment Platform Field
In alignment platforms, precise rotation and positioning functions
are required. The high precision and compact design of the BNAT205
bearing can provide stable rotational support for alignment
platforms, ensuring accuracy and reliability during operation. This
results in precise alignment operations.
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!
