NSK 7321 AC Bearing_NSK 7321 AC Size and Details

NSK 7321 AC bearing

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NSK 7321 AC Bearing Details：

Bearing Name	7321 AC
New Model	7321AC
Old Model	46321 bearing
product Model	7321AC
Category	Angular Contact Ball Bearings
Brand	NSK Bearing
Inner Diameter d ( mm )	105
Outer Diameter D ( mm )	225
Thickness B ( mm )	49

NSK 7321 AC Bearing Bearing Size and Drawing：

NSK 7321 AC Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
FAG QJ321 Bearing	105	225	49	FAG	Angular Contact Ball Bearings
SNR 6321 Bearing	105	225	49	SNR	Deep Groove Ball Bearings
NSK 7321AC Bearing	105	225	49	NSK	Angular Contact Ball Bearings
TBS NJ321ECJ* Bearing	105	225	49	TBS	Cylindrical Roller Bearings
ZKL N321 Bearing	105	225	49	ZKL	Cylindrical Roller Bearings
NACHI NJ 321 +HJ 321 Bearing	105	225	49	NACHI	Cylindrical Roller Bearings
NACHI NU 321 E Bearing	105	225	49	NACHI	Cylindrical Roller Bearings
FAG NJ321E+HJ321E Bearing	105	225	49	FAG	Cylindrical Roller Bearings
NSK 6321-Z Bearing	105	225	49	NSK	Deep Groove Ball Bearings
NTN 7321AC Bearing	105	225	49	NTN	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.

Preview：NSK 7340 AC
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