RA Series Crossed Roller Bearings are a type of precision bearing characterized by an ultra-thin, lightweight design with high rigidity and rotational accuracy. The RA Series is specifically designed for applications where space is limited, and weight needs to be minimized without compromising performance. These bearings are ideal for high-precision machinery, robotics, medical devices, and other applications requiring compactness and high load-bearing capabilities. The RA Series has an extremely thin profile, making it suitable for applications where space-saving and weight reduction are critical. Despite their slim design, they maintain high rigidity and load capacity. This lightweight construction reduces the inertia of moving parts, which is beneficial in high-speed applications and precision equipment.
The Small Crossed Roller Bearing RA Series is a highly efficient and versatile bearing solution widely used in various industrial applications. This article aims to provide an overview of the RA Series, highlighting its advantages and common application areas.
Overview of the RA Series
The RA Series belongs to a family of small-sized crossed roller bearings known for their compact design and optimal load distribution capabilities. These bearings are characterized by their unique structure, which enables them to withstand both radial and axial loads simultaneously. The RA Series exhibits exceptional accuracy, high rotational speeds, and superior rigidity, making it a preferred choice for demanding applications.
Advantages of the RA Series
1. Compact Design: The small size and compactness of the RA Series make it suitable for equipment with limited space, allowing for more flexible design options.
2. High Load Capacity: Despite their compact size, RA Series bearings can handle significant radial, axial, and moment loads due to their optimized load-carrying capacity. This feature ensures reliable performance and extended service life.
3. Rigidity: The crossed roller structure of the RA Series provides excellent resistance to deflection, resulting in enhanced positioning accuracy and stability, even under heavy loads.
4. High Rotational Speed: The low frictional properties of the RA Series contribute to its ability to operate at high speeds without compromising performance or durability.
Common Applications
The versatile design and exceptional performance of the RA Series make it suitable for a wide range of applications across various industries. Some common application areas include:
1. Robotics and Automation: The RA Series plays a crucial role in robotic systems, providing smooth motion control and precise positioning in applications such as robot arms, robotic joints, and end-effectors.
2. Semiconductor Manufacturing: In the semiconductor industry, the RA Series is utilized in wafer handling, pick-and-place machines, and inspection equipment. Its high accuracy and rigidity ensure precise and consistent operations.
3. Machine Tools: The RA Series is widely incorporated into machine tools, including milling machines, lathes, and grinding machines. Its high load capacity and rigidity contribute to stable and precise machining processes.
4. Medical Equipment: Medical imaging devices, surgical robots, and diagnostic equipment often rely on the RA Series for their compactness, precision, and reliability.
5. Aerospace: The RA Series finds applications in aerospace equipment, such as satellite tracking mechanisms and guidance systems, thanks to its ability to withstand extreme conditions and maintain accuracy.
Shaft Diameter | Model No. | Major Dimensions | Shoulder Dimensions | Basic Load Rating(Radial) | Weight | ||||||||
Inner Diameter | Outer Diameter | Roller Pitch Circle Diameter | Width | Greasing Hole | r min | ||||||||
C | C0 | Mass | |||||||||||
d | D | dp | BB1 | a | b | ds | Dh | kN | kN | kg | |||
50 | RA5008 | 50 | 66 | 57 | 8 | 2 | 0.8 | 0.5 | 53.5 | 60.5 | 5.1 | 7.19 | 0.08 |
60 | RA6008 | 60 | 76 | 67 | 8 | 2 | 0.8 | 0.5 | 63.5 | 70.5 | 5.68 | 8.68 | 0.09 |
70 | RA7008 | 70 | 86 | 77 | 8 | 2 | 0.8 | 0.5 | 73.5 | 80.5 | 5.98 | 9.8 | 0.1 |
80 | RA8008 | 80 | 96 | 87 | 8 | 2 | 0.8 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
90 | RA9008 | 90 | 106 | 97 | 8 | 2 | 0.8 | 0.5 | 93.5 | 100.5 | 6.76 | 12.4 | 0.12 |
100 | RA10008 | 100 | 116 | 107 | 8 | 2 | 0.8 | 0.5 | 103.5 | 110.5 | 7.15 | 13.9 | 0.14 |
110 | RA11008 | 110 | 126 | 117 | 8 | 2 | 0.8 | 0.5 | 113.5 | 120.5 | 7.45 | 15 | 0.15 |
120 | RA12008 | 120 | 136 | 127 | 8 | 2 | 0.8 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
130 | RA13008 | 130 | 146 | 137 | 8 | 2 | 0.8 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
140 | RA14008 | 140 | 156 | 147 | 8 | 2 | 0.8 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
150 | RA15008 | 150 | 166 | 157 | 8 | 2 | 0.8 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
160 | RA16013 | 160 | 186 | 172 | 13 | 2.5 | 1.6 | 0.8 | 165 | 179 | 23.3 | 44.9 | 0.59 |
170 | RA17013 | 170 | 196 | 182 | 13 | 2.5 | 1.6 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
180 | RA18013 | 180 | 206 | 192 | 13 | 2.5 | 1.6 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
190 | RA19013 | 190 | 216 | 202 | 13 | 2.5 | 1.6 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
200 | RA20013 | 200 | 226 | 212 | 13 | 2.5 | 1.6 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |