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| KOYO 7938 CDB Bearing Details： |
| Bearing Name | 7938 CDB |
| New Model | 7938CDB |
| Old Model | 1236938 bearing |
| product Model | 7938CDB |
| Category | Angular Contact Ball Bearings |
| Brand | KOYO Bearing |
| Inner Diameter d ( mm ) | 190 |
| Outer Diameter D ( mm ) | 260 |
| Thickness B ( mm ) | 66 |
|
| KOYO 7938 CDB Bearing Bearing Size and Drawing： |
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KOYO 7938 CDB Bearing With size alternative model
| Model | Inner Diameter
d(mm) | Outer Diameter
D(mm) | thickness
B(mm) | Brand | Type |
| NTN 71938C/DT Bearing | 190 | 260 | 66 | NTN | Angular Contact Ball Bearings |
| NSK 71938C/DT Bearing | 190 | 260 | 66 | NSK | Angular Contact Ball Bearings |
| NSK 71938 C/ DB Bearing | 190 | 260 | 66 | NSK | Angular Contact Ball Bearings |
| GMN 71938 C/ DT Bearing | 190 | 260 | 66 | GMN | Angular Contact Ball Bearings |
| BARDEN 71938C/DB Bearing | 190 | 260 | 66 | BARDEN | Angular Contact Ball Bearings |
| NTN 71938 C/ DB Bearing | 190 | 260 | 66 | NTN | Angular Contact Ball Bearings |
| KOYO 7938 CDB Bearing | 190 | 260 | 66 | KOYO | Angular Contact Ball Bearings |
| FAG 71938 C/ DB Bearing | 190 | 260 | 66 | FAG | Angular Contact Ball Bearings |
| BARDEN 71938C/DT Bearing | 190 | 260 | 66 | BARDEN | Angular Contact Ball Bearings |
| TBS 71938 C/ DT Bearing | 190 | 260 | 66 | TBS | Angular Contact Ball Bearings |
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What are the structural components and design advantages of angular contact ball bearings?
Angular contact ball bearings consist of an inner ring, outer ring, steel balls, and a cage. The raceways of the raceways are designed with a contact angle (typically 15°, 25°, or 40°) between the bearing rings and the steel balls. They offer advantages such as the ability to simultaneously withstand radial and unidirectional axial loads, high limiting speed, high precision, good rigidity, and the ability to withstand bidirectional axial loads when installed in pairs.
What are the advantages of angular contact ball bearings compared to other similar bearings?
Compared to deep groove ball bearings, angular contact ball bearings have a higher axial load capacity and higher rigidity, making them suitable for precision positioning applications. Compared to tapered roller bearings, they have a higher limiting speed and lower friction, making them more suitable for high-speed operation. Compared to thrust ball bearings, they can simultaneously withstand combined radial and axial loads, and when used in pairs, they maintain high rigidity under bidirectional axial loads without the need for additional radial bearings.
What are the applicable applications and typical uses of angular contact ball bearings?
These bearings are suitable for high-speed, high-rigidity mechanical applications requiring precise positioning and subjected to combined loads. Typical applications include machine tool spindles, automobile wheel hubs, centrifugal pumps, high-speed electric spindles, industrial robot joints, aero-engine spindles, and precision instrument turntables.
