This series represents a compact Slewing Ring Bearing (SRB) where the thickness of both the inner and outer rings has been reduced to the absolute limit. It is suitable for applications that require a lightweight, compact design, such as the rotating sections of industrial production robots and mechanical manipulators in fields like China's manufacturing industry.
Common Problems and Causes
·Inadequate Lubrication: The use of an unsuitable lubricant, improper lubricant quantity, or an unreasonable lubrication interval are the main causes of bearing failure.
·Fatigue: Approximately one-third of bearing failures are caused by material fatigue.
·Contaminants: Seal failure can allow contaminants to enter the bearing, leading to damage.
·Installation Errors: Errors or improper operations during the installation process can lead to premature bearing failure.
·Excessive Load: If the bearing is subjected to a load exceeding its designed load capacity, its damage will be accelerated.
·Other Causes: Including improper transportation, incorrect fit (mating), etc.
Symptoms of Failure
·The bearing emits a "squeaking" or "grinding" metallic friction sound during operation.
·In severe cases, this will be accompanied by vibration in the steering wheel or mechanical components.
·In vehicles, a damaged wheel bearing will produce a humming or buzzing abnormal noise.
Solutions
·Ensure Correct Lubrication: Use a suitable lubricant and follow the manufacturer's recommended lubrication procedure and intervals.
·Inspection and Cleaning: Regularly inspect the bearing and ensure the seals are intact to prevent the ingress of contaminants.
·Proper Installation: Follow the instruction manual for installation, avoiding operating errors and improper fits.
·Select Appropriate Bearings: Ensure the selected bearing's load capacity meets your application requirements to avoid overloading.
·Timely Replacement: If the bearing is damaged, it should be replaced immediately. For example, if a wheel bearing is damaged, it must be replaced promptly to ensure driving safety.

| 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 | |
| RA5008 | 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 |
| RA8008 | 80 | 96 | 87 | 8 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
| RA9008 | 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 |
| RA12008 | 120 | 136 | 127 | 8 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
| RA13008 | 130 | 146 | 137 | 8 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
| RA14008 | 140 | 156 | 147 | 8 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
| RA15008 | 150 | 166 | 157 | 8 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
| RA16013 | 160 | 186 | 172 | 13 | 0.8 | 165 | 179 | 23.3 | 44.9 | 0.59 |
| RA17013 | 170 | 196 | 182 | 13 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
| RA18013 | 180 | 206 | 192 | 13 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
| RA19013 | 190 | 216 | 202 | 13 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
| RA20013 | 200 | 226 | 212 | 13 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |
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