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| NACHI 21308 CCK Bearing Details： |
| Bearing Name | 21308 CCK |
| New Model | 21308CCK |
| Old Model | 53308 bearing |
| product Model | 21308CCK |
| Category | Spherical Roller Bearings |
| Brand | NACHI Bearing |
| Inner Diameter d ( mm ) | 40 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
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| NACHI 21308 CCK Bearing Bearing Size and Drawing： |
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NACHI 21308 CCK Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| FAG NJ 308 E Bearing | 40 | 90 | 23 | FAG | Cylindrical Roller Bearings |
| KOYO NU 308 Bearing | 40 | 90 | 23 | KOYO | Cylindrical Roller Bearings |
| KOYO 6308RS Bearing | 40 | 90 | 23 | KOYO | Deep Groove Ball Bearings |
| MRC NF 308 Bearing | 40 | 90 | 23 | MRC | Cylindrical Roller Bearings |
| FAG N308E.TVP2 Bearing | 40 | 90 | 23 | FAG | Cylindrical Roller Bearings |
| KOYO 6308BI Bearing | 40 | 90 | 23 | KOYO | Angular Contact Ball Bearings |
| TORRINGTON 6308-2Z Bearing | 40 | 90 | 23 | TORRINGTON | Deep Groove Ball Bearings |
| NTN NJ 303 E +HJ 304 E Bearing | 40 | 90 | 23 | NTN | Cylindrical Roller Bearings |
| TBS 7308 BEC BM Bearing | 40 | 90 | 23 | TBS | Angular Contact Ball Bearings |
| FAG NJ308E+HJ308E Bearing | 40 | 90 | 23 | FAG | 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.
