We introduce you to the NTN NF 321 models bearing the relevant parameters, including the model, size, drawings and other models of the same size, if you have any do not understand or want to learn more parameters or would like to inquire about NTN NF 321, please contact us:
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| NTN NF 321 Bearing Details： |
| Bearing Name | NF 321 |
| New Model | NF321 |
| Old Model | 12321 bearing |
| product Model | NF321 |
| Category | Cylindrical Roller Bearings |
| Brand | NTN Bearing |
| Inner Diameter d ( mm ) | 105 |
| Outer Diameter D ( mm ) | 225 |
| Thickness B ( mm ) | 49 |
|
| NTN NF 321 Bearing Bearing Size and Drawing： |
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NTN NF 321 Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| KOYO 6321RU Bearing | 105 | 225 | 49 | KOYO | Deep Groove Ball Bearings |
| FAG QJ321 Bearing | 105 | 225 | 49 | FAG | Angular Contact Ball Bearings |
| NTN NUP321 Bearing | 105 | 225 | 49 | NTN | Cylindrical Roller Bearings |
| MRC NU 321 Bearing | 105 | 225 | 49 | MRC | Cylindrical Roller Bearings |
| SNR 1321 Bearing | 105 | 225 | 49 | SNR | Self-aligning Ball Bearings |
| KOYO 7321AC Bearing | 105 | 225 | 49 | KOYO | Angular Contact Ball Bearings |
| TBS 7321BEGAM Bearing | 105 | 225 | 49 | TBS | Angular Contact Ball Bearings |
| RHP 7321 B Bearing | 105 | 225 | 49 | RHP | Angular Contact Ball Bearings |
| TBS 7321BECBM Bearing | 105 | 225 | 49 | TBS | Angular Contact Ball Bearings |
| FAG 1321 Bearing | 105 | 225 | 49 | FAG | Self-aligning Ball Bearings |
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What are the structural components and design advantages of cylindrical roller bearings?
Cylindrical roller bearings consist of an inner ring, an outer ring, cylindrical rollers, and a cage (some models have full complement rollers or no inner or outer rings). The rollers and raceways are designed for line contact, offering advantages such as extremely high radial load capacity, good rigidity, low coefficient of friction, high limiting speed, and the ability to allow a certain degree of axial displacement of the shaft relative to the housing bore.
What are the advantages of cylindrical roller bearings compared to other similar bearings?
Compared to deep groove ball bearings, cylindrical roller bearings have significantly higher radial load capacity, making them more suitable for heavy-duty applications. Compared to tapered roller bearings, they have higher limiting speeds, lower frictional heat generation, and simplify system design when not subjected to axial loads. Compared to needle roller bearings, they offer superior rigidity and shock resistance, making them suitable for applications requiring higher stability.
What are the applicable occasions and typical applications of cylindrical roller bearings?
These bearings are suitable for heavy-duty, high-speed machinery requiring rigid support. Typical applications include large motors, machine tool spindles, gearboxes, rolling mills, industrial pumps, papermaking machinery, and mining crushing equipment.
