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| NACHI 21308 CCK+H 308 Bearing Details： |
| Bearing Name | 21308 CCK+H 308 |
| New Model | 21308CCK+H308 |
| Old Model | 253307 bearing |
| product Model | 21308CCK+H308 |
| Category | Spherical Roller Bearings |
| Brand | NACHI Bearing |
| Inner Diameter d ( mm ) | 35 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
|
| NACHI 21308 CCK+H 308 Bearing Bearing Size and Drawing： |
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NACHI 21308 CCK+H 308 Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NTN 21308 CCK+H 308 Bearing | 35 | 90 | 23 | NTN | Spherical Roller Bearings |
| FAG 21308 CCK+H 308 Bearing | 35 | 90 | 23 | FAG | Spherical Roller Bearings |
| STEYR 1308K+H308 Bearing | 35 | 90 | 23 | STEYR | Self-aligning Ball Bearings |
| TBS 1308 K+H 308 Bearing | 35 | 90 | 23 | TBS | Self-aligning Ball Bearings |
| NTN 1308 K+H 308 Bearing | 35 | 90 | 23 | NTN | Self-aligning Ball Bearings |
| TBS 21308 E K+ AH 308* Bearing | 35 | 90 | 23 | TBS | Spherical Roller Bearings |
| TBS 21308EK+H308* Bearing | 35 | 90 | 23 | TBS | Spherical Roller Bearings |
| TBS 1308EKTN9+H308 Bearing | 35 | 90 | 23 | TBS | Self-aligning Ball Bearings |
| NTN 1308K+H308 Bearing | 35 | 90 | 23 | NTN | Self-aligning Ball Bearings |
| NACHI 21308 CCK+H 308 Bearing | 35 | 90 | 23 | NACHI | Spherical 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.
