The R8 is commonly used in heavy-load, low-to-medium-speed rotating mechanisms. Due to its larger dimensions, the bearing features a greater number of balls and larger ball diameters. Fabricated from SUS304 stainless steel, it offers excellent overall mechanical properties; in the large pan-tilt mechanisms of outdoor surveillance cameras, the flanged design allows it to directly bear vertical gravity loads, thereby simplifying bracket design.
Bearing Features
In environments free from strong acids or alkalis, SUS304 generally requires no additional anti-rust lubrication, providing the material basis for "maintenance-free" or "low-maintenance" designs—particularly for remote installation points that are difficult to access. The R8’s flange surface is precision-machined to ensure perpendicularity between the rotating shaft and the mounting base after installation, thereby enhancing the precision of the entire drive system.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | ||||||||||||||||||
| Flange | Open | Shield | d inch |
d mm |
D inch |
D mm |
Df inch |
Df mm |
B inch |
B mm |
Bf inch |
Bf mm |
B1 inch |
B1 mm |
Bf1 inch |
Bf1 mm |
rsmin inch |
rsmin mm |
Cr kN |
Cor kN |
Grease | Oil |
| - | SFR8 | ZZ | 0.5 | 12.7 | 1.125 | 28.575 | 1.2252 | 31.12 | 0.25 | 6.35 | 0.062 | 1.575 | 0.3125 | 7.938 | 0.062 | 1.575 | 0.0157 | 0.4 | 5.11 | 2.41 | 1.6 | 1.8 |

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