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| NSK 21308 CC Bearing Details： |
| Bearing Name | 21308 CC |
| New Model | 21308CC |
| Old Model | 53308 bearing |
| product Model | 21308CC |
| Category | Spherical Roller Bearings |
| Brand | NSK Bearing |
| Inner Diameter d ( mm ) | 40 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
|
| NSK 21308 CC Bearing Bearing Size and Drawing： |
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NSK 21308 CC Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| TBS 7308 B EG AF Bearing | 40 | 90 | 23 | TBS | Angular Contact Ball Bearings |
| NSK NSK21308EAE4 Bearing | 40 | 90 | 23 | NSK | Spherical Roller Bearings |
| DKF 7308 AC Bearing | 40 | 90 | 23 | DKF | Angular Contact Ball Bearings |
| FAG 21308 CC Bearing | 40 | 90 | 23 | FAG | Spherical Roller Bearings |
| TBS 6308-RS Bearing | 40 | 90 | 23 | TBS | Deep Groove Ball Bearings |
| TBS 7308BECBJ Bearing | 40 | 90 | 23 | TBS | Angular Contact Ball Bearings |
| NTN 6308-2Z Bearing | 40 | 90 | 23 | NTN | Deep Groove Ball Bearings |
| NSK NSKBL308 Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball Bearings |
| NSK NJ308 Bearing | 40 | 90 | 23 | NSK | Cylindrical Roller Bearings |
| NSK 6308 NR Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball 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.
