We introduce you to the KOYO NJ221 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 KOYO NJ221, please contact us:
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| KOYO NJ221 Bearing Details： |
| Bearing Name | NJ221 |
| New Model | NJ221 |
| Old Model | 42221 bearing |
| product Model | NJ221 |
| Category | Cylindrical Roller Bearings |
| Brand | KOYO Bearing |
| Inner Diameter d ( mm ) | 105 |
| Outer Diameter D ( mm ) | 190 |
| Thickness B ( mm ) | 36 |
|
| KOYO NJ221 Bearing Bearing Size and Drawing： |
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KOYO NJ221 Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NTN NJ 221 E Bearing | 105 | 190 | 36 | NTN | Cylindrical Roller Bearings |
| NSK QJ221 Bearing | 105 | 190 | 36 | NSK | Angular Contact Ball Bearings |
| RHP 7221B Bearing | 105 | 190 | 36 | RHP | Angular Contact Ball Bearings |
| NSK NJ 221 Bearing | 105 | 190 | 36 | NSK | Cylindrical Roller Bearings |
| TBS NUP221ECP* Bearing | 105 | 190 | 36 | TBS | Cylindrical Roller Bearings |
| NSK NUP221 Bearing | 105 | 190 | 36 | NSK | Cylindrical Roller Bearings |
| NSK 6221-Z Bearing | 105 | 190 | 36 | NSK | Deep Groove Ball Bearings |
| NSK QJ 221 Bearing | 105 | 190 | 36 | NSK | Angular Contact Ball Bearings |
| TBS NU 221 E Bearing | 105 | 190 | 36 | TBS | Cylindrical Roller Bearings |
| STEYR NJ 221 Bearing | 105 | 190 | 36 | STEYR | Cylindrical Roller 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.
