MRC 7321 B Bearing_MRC 7321 B Size and Details

MRC 7321 B bearing

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MRC 7321 B Bearing Details：

Bearing Name	7321 B
New Model	7321B
Old Model	66321 bearing
product Model	7321B
Category	Angular Contact Ball Bearings
Brand	MRC Bearing
Inner Diameter d ( mm )	105
Outer Diameter D ( mm )	225
Thickness B ( mm )	49

MRC 7321 B Bearing Bearing Size and Drawing：

MRC 7321 B Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
TBS NUP 321 E Bearing	105	225	49	TBS	Cylindrical Roller Bearings
RIV NF321 Bearing	105	225	49	RIV	Cylindrical Roller Bearings
FAG NJ 2209 E +HJ 2210 E Bearing	105	225	49	FAG	Cylindrical Roller Bearings
NSK 7321AC Bearing	105	225	49	NSK	Angular Contact Ball Bearings
KOYO NU 321 Bearing	105	225	49	KOYO	Cylindrical Roller Bearings
NSK 7321 B Bearing	105	225	49	NSK	Angular Contact Ball Bearings
KOYO 6321-2RZ Bearing	105	225	49	KOYO	Deep Groove Ball Bearings
DKF 7321 AC Bearing	105	225	49	DKF	Angular Contact Ball Bearings
NACHI NJ321 Bearing	105	225	49	NACHI	Cylindrical Roller Bearings
RIV NJ 321 Bearing	105	225	49	RIV	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.

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