RA series thin-profile crossed roller bearings feature smaller outer diameter and width dimensions, making them suitable for space-constrained applications. This series is available in cage, separator, and full complement types to suit various needs.
Load Capacity:
Basic Dynamic Load Rating (Ca): 234,000 N
Basic Axial Static Load Rating (C0a): 690,000 N
Basic Axial Dynamic Load Rating (Cr): 166,000 N
Basic Radial Static Load Rating (C0r): 340,000 N
Bearing Features:
1. Excellent Rotational Accuracy: High speed capability, able to withstand large axial and radial loads.
2. Easy Installation: Saves installation space, reduces shaft length and machining costs.
3. Low Thermal Expansion: Minimal dimensional changes, suitable for high-precision applications.
4. Low Starting Torque: Nylon separators reduce rotational inertia and facilitate angular indexing control.
5. High rigidity and precision: Optimized preload enhances rigidity and roller running accuracy.
6. Wear and corrosion resistance: Constructed with high-carbon chromium steel (GCr15) and TN engineering plastics, providing excellent impact resistance and surface wear resistance.
Applications:
RA series crossed roller bearings are widely used in robot hand rotary joints, precision testing instruments, direct-drive torque motors, high-precision turntables, and other applications requiring high precision and rigidity.
| Bearing Type | Dimension | Shoulder Size | Basic Load rating(radial) | Weight | ||||||
| Inner Diameter | Outside Diameter | Roller Pitch Diameter | Height | Chamfer | Cr | Cor | ||||
| d | D | Dpw | B B1 | Rmin | ds | Dh | KN | KN | kg | |
| RA 5008 | 50 | 66 | 57 | 8 | 0.5 | 53.5 | 60.5 | 5.1 | 7.19 | 0.08 |
| RA6008 | 60 | 76 | 67 | 8 | 0.5 | 63.5 | 70.5 | 5.68 | 8.68 | 0.09 |
| RA7008 | 70 | 86 | 77 | 8 | 0.5 | 73.5 | 80.5 | 5.98 | 9.8 | 0.1 |
| RA 8008 | 80 | 96 | 87 | 8 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
| RA 9008 | 90 | 106 | 97 | 8 | 0.5 | 93.5 | 100.5 | 6.76 | 12.4 | 0.12 |
| RA10008 | 100 | 116 | 107 | 8 | 0.5 | 103.5 | 110.5 | 7.15 | 13.9 | 0.14 |
| RA11008 | 110 | 126 | 117 | 8 | 0.5 | 113.5 | 120.5 | 7.45 | 15 | 0.15 |
| RA 12008 | 120 | 136 | 127 | 8 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
| RA 13008 | 130 | 146 | 137 | 8 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
| RA 14008 | 140 | 156 | 147 | 8 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
| RA 15008 | 150 | 166 | 157 | 8 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
| RA 16013 | 160 | 186 | 172 | 13 | 0.8 | 165 | 179 | 23.3 | 44.9 | 0.59 |
| RA 17013 | 170 | 196 | 182 | 13 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
| RA 18013 | 180 | 206 | 192 | 13 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
| RA 19013 | 190 | 216 | 202 | 13 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
| RA 20013 | 200 | 226 | 212 | 13 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |
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