RAU integrated crossed roller bearings, especially the RAU models, enable lightweight and compact installations due to their extremely small cross-sectional area. Because of their integrated inner and outer ring construction, they can be used for both outer and inner ring rotation. A thinner version with a 5mm width and a compatible RA type are also available. The thinner series is available starting from ultra-small sizes with an inner diameter of 10mm.
Bearing Features
·Stiffness: The force capacity per unit deformation. RAU types can reach 300–800 N/μm, far exceeding ordinary angular contact ball bearings (approximately 50–150 N/μm), and are less prone to clearance misalignment even under heavy load startup.
·Precision Class: Mainstream is P4/P5 (ISO standard), equivalent to ±2μm rotational error, an order of magnitude higher than general mechanical bearings, making it standard for precision measuring instruments and five-axis machining centers.
·Limiting Speed: Depending on size and lubrication method, typically between 2000–6000 rpm, stable operation is possible with low-friction grease.
·Wear Resistance: Made of GCr15 bearing steel with surface nitriding treatment, hardness HRC 60 or higher, wear life can reach over 10,000 hours (subject to significant influence from operating conditions).
Applications
Robot joints, medical equipment, aerospace equipment, multi-station welding machines, communication radar, weather radar, precision rotary indexing tables, precision machine tools, precision testing instruments, precision rotary tables, large radio and optical telescopes, etc.
| Bearing Type | Dimension | Shoulder size | Basic Load rating(radial) | Weight | ||||||
| Inner Diameter | Outside Diameter | Roller Pitch Diameter | High | Chamfer | Cr | Cor | ||||
| d | D | Dpw | B B1 | rmin | ds | Dn | KN | KN | kg | |
| RAU5008 | 50 | 66 | 57 | 8 | 0.5 | 53.5 | 60.5 | 5.1 | 7.19 | 0.08 |
| RAU6008 | 60 | 76 | 67 | 8 | 0.5 | 63.5 | 70.5 | 5.68 | 8.68 | 0.09 |
| RAU7008 | 70 | 86 | 77 | 8 | 0.5 | 73.5 | 80.5 | 5.98 | 9.8 | 0.1 |
| RAU8008 | 80 | 96 | 87 | 8 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
| RAU9008 | 90 | 106 | 97 | 8 | 0.5 | 93.5 | 100.5 | 6.76 | 12.4 | 0.12 |
| RAU10008 | 100 | 116 | 107 | 8 | 0.5 | 103.5 | 110.5 | 7.15 | 13.9 | 0.14 |
| RAU11008 | 110 | 126 | 117 | 8 | 0.5 | 113.5 | 120.5 | 7.45 | 15 | 0.15 |
| RAU12008 | 120 | 136 | 127 | 8 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
| RAU13008 | 130 | 146 | 137 | 8 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
| RAU14008 | 140 | 156 | 147 | 8 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
| RAU15008 | 150 | 166 | 157 | 8 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
| RAU16013 | 160 | 186 | 172 | 13 | 0.8 | 165 | 179 | 23.3 | 44.9 | 0.59 |
| RAU17013 | 170 | 196 | 182 | 13 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
| RAU18013 | 180 | 206 | 192 | 13 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
| RAU19013 | 190 | 216 | 202 | 13 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
| RAU20013 | 200 | 226 | 212 | 13 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |
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