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| FAG NA 4904 Bearing Details： |
| Bearing Name | NA 4904 |
| New Model | NA4904 |
| Old Model | 4544904 bearing |
| product Model | NA4904 |
| Category | Needle Roller Bearing |
| Brand | FAG Bearing |
| Inner Diameter d ( mm ) | 20 |
| Outer Diameter D ( mm ) | 37 |
| Thickness B ( mm ) | 17 |
|
| FAG NA 4904 Bearing Bearing Size and Drawing： |
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FAG NA 4904 Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| IKO NA4904 Bearing | 20 | 37 | 17 | IKO | Needle Roller Bearing |
| INA NA 4904 Bearing | 20 | 37 | 17 | INA | Needle Roller Bearing |
| INA NA4904 Bearing | 20 | 37 | 17 | INA | Needle Roller Bearing |
| FAG NA4904 Bearing | 20 | 37 | 17 | FAG | Needle Roller Bearing |
| NTN RNA 4904 Bearing | 20 | 37 | 17 | NTN | Needle Roller Bearing |
| INA NA 4904.2RS Bearing | 20 | 37 | 17 | INA | Needle Roller Bearing |
| TBS RNA 4904 Bearing | 20 | 37 | 17 | TBS | Needle Roller Bearing |
| TBS NA 4904 Bearing | 20 | 37 | 17 | TBS | Needle Roller Bearing |
| TBS NA4904 Bearing | 20 | 37 | 17 | TBS | Needle Roller Bearing |
| FAG RNA4904 Bearing | 20 | 37 | 17 | FAG | Needle Roller Bearing |
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What are the structural components and design advantages of needle roller bearings?
Needle roller bearings consist of slender needle rollers, a cage, and rings (or ringless bearings) typically with a thin-walled design. The needle rollers and raceways have a line contact design, offering advantages such as extremely small radial cross-section, high load capacity, good rigidity, and a low coefficient of friction. They are suitable for compact structures with limited radial space and the need to withstand high loads.
What are the advantages of needle roller bearings compared to other similar bearings?
Compared to cylindrical roller bearings, needle roller bearings have a significantly smaller radial cross-section, making them more suitable for space-constrained compact designs. Compared to deep groove ball bearings, they have a higher radial load capacity and offer greater shaft diameter design flexibility for the same outer diameter. Compared to sliding bearings, they have lower starting friction, higher running accuracy, and require no complex lubrication system.
What are the application scenarios and typical applications of needle roller bearings?
These bearings are suitable for mechanical applications with limited radial space, high load capacity, and compact structure requirements. Typical applications include automotive transmissions, engine connecting rods, universal joints, textile machinery, industrial robot joints, motorcycle engines, and aviation hydraulic pumps.
