MRC QJ 311 Bearing_MRC QJ 311 Size and Details

MRC QJ 311 bearing

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MRC QJ 311 Bearing Details：

Bearing Name	QJ 311
New Model	QJ311
Old Model	176311 bearing
product Model	QJ311
Category	Angular Contact Ball Bearings
Brand	MRC Bearing
Inner Diameter d ( mm )	55
Outer Diameter D ( mm )	120
Thickness B ( mm )	29

MRC QJ 311 Bearing Bearing Size and Drawing：

MRC QJ 311 Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
NSK NSKBL311Z Bearing	55	120	29	NSK	Deep Groove Ball Bearings
NACHI 30311 Bearing	55	120	29	NACHI	Tapered Roller Bearings
KOYO NJ311 Bearing	55	120	29	KOYO	Cylindrical Roller Bearings
FAG 6311-ZN Bearing	55	120	29	FAG	Deep Groove Ball Bearings
KOYO 6311-2RS Bearing	55	120	29	KOYO	Deep Groove Ball Bearings
FAG 1311K Bearing	55	120	29	FAG	Self-aligning Ball Bearings
KOYO 6311-2Z Bearing	55	120	29	KOYO	Deep Groove Ball Bearings
RIV NF311 Bearing	55	120	29	RIV	Cylindrical Roller Bearings
KOYO 31311 Bearing	55	120	29	KOYO	Tapered Roller Bearings
TBS 21311E Bearing	55	120	29	TBS	Spherical 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：TBS 7009 C/ DB
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