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| TBS 21308 E K Bearing Details： |
| Bearing Name | 21308 E K |
| New Model | 21308EK |
| Old Model | bearing |
| product Model | 21308EK |
| Category | Spherical Roller Bearings |
| Brand | TBS Bearing |
| Inner Diameter d ( mm ) | 40 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
|
| TBS 21308 E K Bearing Bearing Size and Drawing： |
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TBS 21308 E K Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NTN 30308 Bearing | 40 | 90 | 23 | NTN | Tapered Roller Bearings |
| NSK NJ308+HJ308 Bearing | 40 | 90 | 23 | NSK | Cylindrical Roller Bearings |
| NSK NU308 Bearing | 40 | 90 | 23 | NSK | Cylindrical Roller Bearings |
| TBS NUP 308 ECP Bearing | 40 | 90 | 23 | TBS | Cylindrical Roller Bearings |
| TBS 308-2ZNR Bearing | 40 | 90 | 23 | TBS | Deep Groove Ball Bearings |
| RIV N308 Bearing | 40 | 90 | 23 | RIV | Cylindrical Roller Bearings |
| TBS 7308 BEC BPH* Bearing | 40 | 90 | 23 | TBS | Angular Contact Ball Bearings |
| TBS 30308 Bearing | 40 | 90 | 23 | TBS | Tapered Roller Bearings |
| NSK NUP308 Bearing | 40 | 90 | 23 | NSK | Cylindrical Roller Bearings |
| NSK 6308-2RZ 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.
