KOYO 6221 BI Bearing_KOYO 6221 BI Size and Details

KOYO 6221 BI bearing

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KOYO 6221 BI Bearing Details：

Bearing Name	6221 BI
New Model	6221BI
Old Model	176221 bearing
product Model	6221BI
Category	Angular Contact Ball Bearings
Brand	KOYO Bearing
Inner Diameter d ( mm )	105
Outer Diameter D ( mm )	190
Thickness B ( mm )	36

KOYO 6221 BI Bearing Bearing Size and Drawing：

KOYO 6221 BI Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
FAG QJ221 Bearing	105	190	36	FAG	Angular Contact Ball Bearings
TBS NUP221ECP* Bearing	105	190	36	TBS	Cylindrical Roller Bearings
NSK NSK7221CTY Bearing	105	190	36	NSK	Angular Contact Ball Bearings
TBS *6221-2RS1 Bearing	105	190	36	TBS	Deep Groove Ball Bearings
RHP 7221 C Bearing	105	190	36	RHP	Angular Contact Ball Bearings
KOYO NJ221E Bearing	105	190	36	KOYO	Cylindrical Roller Bearings
FAG NU221E.TVP2 Bearing	105	190	36	FAG	Cylindrical Roller Bearings
NTN N221 Bearing	105	190	36	NTN	Cylindrical Roller Bearings
NSK NSK7221BG Bearing	105	190	36	NSK	Angular Contact Ball Bearings
KOYO 6221-2RZ Bearing	105	190	36	KOYO	Deep Groove 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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