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| NTN 30308 Bearing Details： |
| Bearing Name | 30308 |
| New Model | 30308 |
| Old Model | 7308E bearing |
| product Model | 30308 |
| Category | Tapered Roller Bearings |
| Brand | NTN Bearing |
| Inner Diameter d ( mm ) | 40 |
| Outer Diameter D ( mm ) | 90 |
| Thickness B ( mm ) | 23 |
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| NTN 30308 Bearing Bearing Size and Drawing： |
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NTN 30308 Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| TBS 6308-RS Bearing | 40 | 90 | 23 | TBS | Deep Groove Ball Bearings |
| KOYO 6308 2RS Bearing | 40 | 90 | 23 | KOYO | Deep Groove Ball Bearings |
| TBS 7308BEGAM* Bearing | 40 | 90 | 23 | TBS | Angular Contact Ball Bearings |
| NACHI 6308-2RS Bearing | 40 | 90 | 23 | NACHI | Deep Groove Ball Bearings |
| TBS 1308K Bearing | 40 | 90 | 23 | TBS | Self-aligning Ball Bearings |
| FAG 21308 CCK Bearing | 40 | 90 | 23 | FAG | Spherical Roller Bearings |
| KOYO 6308 Bearing | 40 | 90 | 23 | KOYO | Deep Groove Ball Bearings |
| NSK 6308-RZ Bearing | 40 | 90 | 23 | NSK | Deep Groove Ball Bearings |
| NTN 30308 Bearing | 40 | 90 | 23 | NTN | Tapered Roller Bearings |
| FAG NJ308E.TVP2+HJ308E Bearing | 40 | 90 | 23 | FAG | Cylindrical Roller Bearings |
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What are the structural components and design advantages of tapered roller bearings?
Tapered roller bearings consist of an inner ring, an outer ring, tapered rollers, and a cage. The rollers and raceways have a tapered design, with the extensions of all the tapered surfaces converging on the bearing axis. They offer advantages such as the ability to simultaneously withstand radial and unidirectional axial loads, high load capacity, good rigidity, adjustable clearance, and are typically used in pairs.
What are the advantages of tapered roller bearings compared to other similar bearings?
Compared to cylindrical roller bearings, tapered roller bearings can withstand larger axial loads and have a higher load capacity. Compared to angular contact ball bearings, their radial and axial load capacities are significantly higher, making them more suitable for heavy-duty impact conditions. Compared to thrust bearings, they can simultaneously withstand combined radial and axial loads, have a more compact structure, and do not require additional radial bearings.
What are the applicable occasions and typical applications of tapered roller bearings?
These bearings are suitable for heavy-duty, impact-prone mechanical applications requiring precise positioning and adjustable clearance. Typical applications include automotive wheel hubs, gearboxes, rolling mill roll necks, machine tool spindles, engineering machinery drive axles, railway vehicle axles, and mining crushing equipment.
