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| NACHI 1221 K Bearing Details： |
| Bearing Name | 1221 K |
| New Model | 1221K |
| Old Model | 111221 bearing |
| product Model | 1221K |
| Category | Self-aligning Ball Bearings |
| Brand | NACHI Bearing |
| Inner Diameter d ( mm ) | 105 |
| Outer Diameter D ( mm ) | 190 |
| Thickness B ( mm ) | 36 |
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| NACHI 1221 K Bearing Bearing Size and Drawing： |
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NACHI 1221 K Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| TBS 7221BECBP Bearing | 105 | 190 | 36 | TBS | Angular Contact Ball Bearings |
| TBS 6221-2RS1 Bearing | 105 | 190 | 36 | TBS | Deep Groove Ball Bearings |
| KOYO 7221C Bearing | 105 | 190 | 36 | KOYO | Angular Contact Ball Bearings |
| NACHI 6221 Bearing | 105 | 190 | 36 | NACHI | Deep Groove Ball Bearings |
| KOYO NUP221 Bearing | 105 | 190 | 36 | KOYO | Cylindrical Roller Bearings |
| ZKL N221 Bearing | 105 | 190 | 36 | ZKL | Cylindrical Roller Bearings |
| NTN 6221-Z Bearing | 105 | 190 | 36 | NTN | Deep Groove Ball Bearings |
| NTN N221 Bearing | 105 | 190 | 36 | NTN | Cylindrical Roller Bearings |
| RIV NJ221 Bearing | 105 | 190 | 36 | RIV | Cylindrical Roller Bearings |
| RHP 7221AC Bearing | 105 | 190 | 36 | RHP | Angular Contact Ball Bearings |
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What are the structural components and design advantages of self-aligning ball bearings?
Self-aligning ball bearings consist of an inner ring, an outer ring, two rows of steel balls, and a cage. The outer ring raceway is spherical, and the inner ring has a double-raceway design, providing excellent self-aligning performance. This effectively compensates for alignment errors between the shaft and the housing bore, as well as shaft deflection. They also have low friction and a high limiting speed, making them suitable for applications with installation misalignment or shaft deformation.
What are the advantages of self-aligning ball bearings compared to other similar bearings?
Compared to deep groove ball bearings, self-aligning ball bearings have self-aligning capabilities, accommodating greater alignment errors and shaft deflection. Compared to spherical roller bearings, they have a higher limiting speed and lower friction, but a lower load capacity, making them more suitable for medium to light load conditions. Compared to cylindrical roller bearings, they can withstand certain axial loads, and their self-aligning performance reduces the requirements for installation precision.
What are the applicable occasions and typical applications of self-aligning ball bearings?
These bearings are suitable for medium to light load applications where alignment precision requirements are not high and deflection or impact is present. Typical applications include textile machinery, agricultural equipment, conveyor rollers, small fans, crushers, vibrating screens, and woodworking machinery.
