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NSK 7021AC/DF bearing

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NSK 7021AC/DF Bearing Details:
Bearing Name7021AC/DF
New Model7021AC/DF
Old Model346121 bearing
product Model7021AC/DF
CategoryAngular Contact Ball Bearings
BrandNSK Bearing
Inner Diameter d ( mm ) 105
Outer Diameter D ( mm )160
Thickness B ( mm )52
NSK 7021AC/DF Bearing   Bearing Size and Drawing:
7021AC/DF
NSK 7021AC/DF Bearing With size alternative model
ModelInner Diameter
d(mm)
Outer Diameter
D(mm)
thickness
B(mm)
BrandType
NACHI 7021 AC/ DF Bearing10516052NACHIAngular Contact Ball Bearings
KOYO 7021 C/ DT Bearing10516052KOYOAngular Contact Ball Bearings
KOYO 7021 AC/ DT Bearing10516052KOYOAngular Contact Ball Bearings
TBS 7021C/DF Bearing10516052TBSAngular Contact Ball Bearings
NTN 7021AC/DT Bearing10516052NTNAngular Contact Ball Bearings
KOYO 7021 AC/ DF Bearing10516052KOYOAngular Contact Ball Bearings
FAG 7021C/DT Bearing10516052FAGAngular Contact Ball Bearings
SNR 7021 AC/ DT Bearing10516052SNRAngular Contact Ball Bearings
NTN 7021AC/DB Bearing10516052NTNAngular Contact Ball Bearings
SNR 7021 AC/ DB Bearing10516052SNRAngular 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.

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