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| KOYO 30309 D JR Bearing Details： |
| Bearing Name | 30309 D JR |
| New Model | 30309DJR |
| Old Model | 27309E bearing |
| product Model | 30309DJR |
| Category | Tapered Roller Bearings |
| Brand | KOYO Bearing |
| Inner Diameter d ( mm ) | 45 |
| Outer Diameter D ( mm ) | 100 |
| Thickness B ( mm ) | 27.25 |
|
| KOYO 30309 D JR Bearing Bearing Size and Drawing： |
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KOYO 30309 D JR Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NSK NSK31309J2/QCL7C Bearing | 45 | 100 | 27.25 | NSK | Tapered Roller Bearings |
| KOYO 30309 Bearing | 45 | 100 | 27.25 | KOYO | Tapered Roller Bearings |
| KOYO 30309 JR Bearing | 45 | 100 | 27.25 | KOYO | Tapered Roller Bearings |
| KOYO 31309 Bearing | 45 | 100 | 27.25 | KOYO | Tapered Roller Bearings |
| TBS 30309J2/Q Bearing | 45 | 100 | 27.25 | TBS | Tapered Roller Bearings |
| TBS 31309 J2/Q CL7 C Bearing | 45 | 100 | 27.25 | TBS | Tapered Roller Bearings |
| TBS 30309 J2/Q Bearing | 45 | 100 | 27.25 | TBS | Tapered Roller Bearings |
| TBS 31309J2/QCL7C* Bearing | 45 | 100 | 27.25 | TBS | Tapered Roller Bearings |
| KOYO 30309 D JR Bearing | 45 | 100 | 27.25 | KOYO | Tapered Roller Bearings |
| CHINA 30309 Bearing | 45 | 100 | 27.25 | CHINA | Tapered 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.
