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| KOYO NUP 321 R Bearing Details： |
| Bearing Name | NUP 321 R |
| New Model | NUP321R |
| Old Model | 92321E bearing |
| product Model | NUP321R |
| Category | Cylindrical Roller Bearings |
| Brand | KOYO Bearing |
| Inner Diameter d ( mm ) | 105 |
| Outer Diameter D ( mm ) | 225 |
| Thickness B ( mm ) | 49 |
|
| KOYO NUP 321 R Bearing Bearing Size and Drawing： |
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KOYO NUP 321 R Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NSK NSKNJ321ECP Bearing | 105 | 225 | 49 | NSK | Cylindrical Roller Bearings |
| FLT N321 Bearing | 105 | 225 | 49 | FLT | Cylindrical Roller Bearings |
| KOYO 6321-Z Bearing | 105 | 225 | 49 | KOYO | Deep Groove Ball Bearings |
| NSK NJ 321 E Bearing | 105 | 225 | 49 | NSK | Cylindrical Roller Bearings |
| TBS NJ321ECJ* Bearing | 105 | 225 | 49 | TBS | Cylindrical Roller Bearings |
| TBS N 321 E Bearing | 105 | 225 | 49 | TBS | Cylindrical Roller Bearings |
| KOYO N321 Bearing | 105 | 225 | 49 | KOYO | Cylindrical Roller Bearings |
| KOYO 1321 Bearing | 105 | 225 | 49 | KOYO | Self-aligning Ball Bearings |
| FAG NUP321E Bearing | 105 | 225 | 49 | FAG | Cylindrical Roller Bearings |
| STEYR 1321 Bearing | 105 | 225 | 49 | STEYR | 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.
