• +86 13837949030 +86 15890619536
  • info@lymcbearings.com export@lymcbearings.com
  • Luoxin Industrial Cluster, Luoyang City,Henan Province,China
RA Series Crossed Roller Bearings - High Precision & Compact Design

RA Series Crossed Roller Bearings

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.

Product Details

RA Series Crossed Roller Bearings Introduction

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