MRC QJ308 Bearing_MRC QJ308 Size and Details

MRC QJ308 bearing

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MRC QJ308 Bearing Details：

Bearing Name	QJ308
New Model	QJ308
Old Model	176308 bearing
product Model	QJ308
Category	Angular Contact Ball Bearings
Brand	MRC Bearing
Inner Diameter d ( mm )	40
Outer Diameter D ( mm )	90
Thickness B ( mm )	23

MRC QJ308 Bearing Bearing Size and Drawing：

MRC QJ308 Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
KOYO NJ308 R+HJ308 R Bearing	40	90	23	KOYO	Cylindrical Roller Bearings
TORRINGTON 6308 Bearing	40	90	23	TORRINGTON	Deep Groove Ball Bearings
FAG 6308-RS Bearing	40	90	23	FAG	Deep Groove Ball Bearings
NACHI 31308 Bearing	40	90	23	NACHI	Tapered Roller Bearings
NSK 6308N Bearing	40	90	23	NSK	Deep Groove Ball Bearings
NSK 6308-2Z Bearing	40	90	23	NSK	Deep Groove Ball Bearings
NTN 6308-2ZN Bearing	40	90	23	NTN	Deep Groove Ball Bearings
KOYO NJ 308 +HJ 308 Bearing	40	90	23	KOYO	Cylindrical Roller Bearings
TBS 21308 E K* Bearing	40	90	23	TBS	Spherical Roller Bearings
TBS 6308-2RZ Bearing	40	90	23	TBS	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.

Preview：MRC QJ317
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