NTN 7321AC Bearing_NTN 7321AC Size and Details

NTN 7321AC bearing

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NTN 7321AC Bearing Details：

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

NTN 7321AC Bearing Bearing Size and Drawing：

NTN 7321AC Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
KOYO NJ 321 +HJ 321 Bearing	105	225	49	KOYO	Cylindrical Roller Bearings
FAG NJ 321 E Bearing	105	225	49	FAG	Cylindrical Roller Bearings
TBS NJ 321 E CP* Bearing	105	225	49	TBS	Cylindrical Roller Bearings
NACHI NU 321 E Bearing	105	225	49	NACHI	Cylindrical Roller Bearings
NSK 6321 Bearing	105	225	49	NSK	Deep Groove Ball Bearings
TORRINGTON 6321 Bearing	105	225	49	TORRINGTON	Deep Groove Ball Bearings
NTN NF 321 Bearing	105	225	49	NTN	Cylindrical Roller Bearings
NACHI 7321B Bearing	105	225	49	NACHI	Angular Contact Ball Bearings
NACHI 6321-2Z Bearing	105	225	49	NACHI	Deep Groove Ball Bearings
NSK NU 321 Bearing	105	225	49	NSK	Cylindrical Roller 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：NTN 7311AC
Next：NTN 7312AC

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