The 63 series is one of the highest load-carrying specifications among deep groove ball bearings, constructed from SUS420 stainless steel and designed specifically for harsh operating conditions. Its large ball diameter and deep grooves enable it to withstand impact loads. In terms of material mechanics, the martensitic structure of SUS420 ensures extremely high rigidity under heavy loads, reducing the risk of structural damage.
Bearing Features
This series features enhanced sealing performance, resisting the intrusion of external particles and liquids. From a fatigue perspective, the specially heat-treated 420 steel possesses excellent contact fatigue strength, maintaining long-term operational stability even in harsh environments. It is widely used in outdoor power machinery, agricultural machinery, and transmission systems, solving the problem of ordinary steel bearings seizing due to rain or soil moisture by improving the material's rust resistance.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | ||||||||||
| Flange | Open | Shield | d mm |
D mm |
Df mm |
B mm |
Bf mm |
B1 mm |
Bf1 mm |
rsmin mm |
Cr(kN) | Cor(kN) | Grease | Oil |
| - | S633 | ZZ | 3 | 13 | - | 5 | - | 5 | - | 0.2 | 1.3 | 0.49 | 4.1 | 4.6 |
| F | S634 | ZZ | 4 | 16 | 18 | 5 | 1 | 5 | 1 | 0.3 | 1.34 | 0.519 | 3.3 | 3.7 |
| F | S635 | ZZ | 5 | 19 | 22 | 6 | 1.5 | 6 | 1.5 | 0.3 | 2.33 | 0.892 | 2.8 | 3.1 |
| - | S636 | ZZ | 6 | 22 | - | 7 | - | 7 | - | 0.3 | 3.33 | 1.42 | 2.4 | 2.6 |
| - | S637 | ZZ | 7 | 26 | - | 9 | - | 9 | - | 0.3 | 4.57 | 1.98 | 2 | 2.2 |
| - | S638 | ZZ | 8 | 28 | - | 9 | - | 9 | - | 0.3 | 4.57 | 1.98 | 1.8 | 2.1 |
| - | S639 | ZZ | 9 | 30 | - | 10 | - | 10 | - | 0.6 | 4.66 | 2.08 | 1.7 | 1.9 |

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