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| NTN 21308CC Bearing Details： |
| Bearing Name | 21308CC |
| New Model | 21308CC |
| Old Model | 53308 bearing |
| product Model | 21308CC |
| Category | Spherical Roller Bearings |
| Brand | NTN Bearing |
| Inner Diameter d ( mm ) | 40 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
|
| NTN 21308CC Bearing Bearing Size and Drawing： |
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NTN 21308CC Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| KOYO NJ308+HJ308 Bearing | 40 | 90 | 23 | KOYO | Cylindrical Roller Bearings |
| NSK 6308-Z Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball Bearings |
| RHP 6308-2RS Bearing | 40 | 90 | 23 | RHP | Deep Groove Ball Bearings |
| MRC 6308-2Z Bearing | 40 | 90 | 23 | MRC | Deep Groove Ball Bearings |
| NSK NSKBL308 Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball Bearings |
| KOYO 6308-2RZ Bearing | 40 | 90 | 23 | KOYO | Deep Groove Ball Bearings |
| FAG 1308K Bearing | 40 | 90 | 23 | FAG | Self-aligning Ball Bearings |
| NSK NSKBL308ZZ Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball Bearings |
| TBS NJ 2332 E +HJ 2334 E Bearing | 40 | 90 | 23 | TBS | Cylindrical Roller Bearings |
| TBS NJ 308 E Bearing | 40 | 90 | 23 | TBS | 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.
