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| NACHI 1321 K Bearing Details： |
| Bearing Name | 1321 K |
| New Model | 1321K |
| Old Model | 111321 bearing |
| product Model | 1321K |
| Category | Self-aligning Ball Bearings |
| Brand | NACHI Bearing |
| Inner Diameter d ( mm ) | 105 |
| Outer Diameter D ( mm ) | 225 |
| Thickness B ( mm ) | 49 |
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| NACHI 1321 K Bearing Bearing Size and Drawing： |
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NACHI 1321 K Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NACHI 1321K Bearing | 105 | 225 | 49 | NACHI | Self-aligning Ball Bearings |
| NSK 7321AC Bearing | 105 | 225 | 49 | NSK | Angular Contact Ball Bearings |
| KOYO 7321C Bearing | 105 | 225 | 49 | KOYO | Angular Contact Ball Bearings |
| KOYO NJ 321 +HJ 321 Bearing | 105 | 225 | 49 | KOYO | Cylindrical Roller Bearings |
| TBS NJ 321 E CP* Bearing | 105 | 225 | 49 | TBS | Cylindrical Roller Bearings |
| FAG 1321 Bearing | 105 | 225 | 49 | FAG | Self-aligning Ball Bearings |
| FAG N 321 Bearing | 105 | 225 | 49 | FAG | Cylindrical Roller Bearings |
| ZKL NJ 321 Bearing | 105 | 225 | 49 | ZKL | Cylindrical Roller Bearings |
| NSK NSKNU321ECP Bearing | 105 | 225 | 49 | NSK | Cylindrical Roller Bearings |
| TBS *NU321ECP Bearing | 105 | 225 | 49 | TBS | Cylindrical Roller 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.
