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| KOYO 21311 CC Bearing Details： |
| Bearing Name | 21311 CC |
| New Model | 21311CC |
| Old Model | 53311 bearing |
| product Model | 21311CC |
| Category | Spherical Roller Bearings |
| Brand | KOYO Bearing |
| Inner Diameter d ( mm ) | 55 |
| Outer Diameter D ( mm ) | 120 |
| Thickness B ( mm ) | 29 |
|
| KOYO 21311 CC Bearing Bearing Size and Drawing： |
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KOYO 21311 CC Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| FAG 21311CC Bearing | 55 | 120 | 29 | FAG | Spherical Roller Bearings |
| NSK 6311 NR Bearing | 55 | 120 | 29 | NSK | Deep Groove Ball Bearings |
| NSK NU311 Bearing | 55 | 120 | 29 | NSK | Cylindrical Roller Bearings |
| KOYO NJ311+HJ311 Bearing | 55 | 120 | 29 | KOYO | Cylindrical Roller Bearings |
| KOYO 6311-2Z Bearing | 55 | 120 | 29 | KOYO | Deep Groove Ball Bearings |
| NSK 6311-2RZ Bearing | 55 | 120 | 29 | NSK | Deep Groove Ball Bearings |
| TBS NU 311 E Bearing | 55 | 120 | 29 | TBS | Cylindrical Roller Bearings |
| STEYR 30311 Bearing | 55 | 120 | 29 | STEYR | Tapered Roller Bearings |
| NACHI 6311-2RS Bearing | 55 | 120 | 29 | NACHI | Deep Groove Ball Bearings |
| RIV NJ 311 Bearing | 55 | 120 | 29 | RIV | Cylindrical Roller Bearings |
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What are the structural components and design advantages of spherical roller bearings?
Spherical roller bearings consist of an inner ring, an outer ring, spherical rollers, and a cage. The inner ring has two raceways, and the outer ring has a spherical raceway. The rollers have a drum-shaped design, providing self-aligning capability, effectively compensating for misalignment between the shaft and the housing bore, as well as shaft deflection. They also offer extremely high load-bearing capacity, shock resistance, and vibration resistance.
What are the advantages compared to other similar bearings?
Compared to self-aligning ball bearings, spherical roller bearings have significantly higher radial and axial load-bearing capacity, making them suitable for heavy-duty applications. Compared to cylindrical roller bearings, they have self-aligning capabilities, accommodating installation errors and shaft deformation. Compared to tapered roller bearings, their self-aligning performance is superior, making them more suitable for long shafts or applications with high flexibility.
What are the applicable occasions and typical applications?
These bearings are suitable for heavy-duty machinery applications involving heavy loads, vibration, shock, or misalignment. Typical applications include mining conveying equipment, wind turbine main shafts, paper calenders, large speed reducers, vibrating screens, ship propulsion systems, and metallurgical rolling mills.
