TBS QJ 311 N2 M A* Bearing_TBS QJ 311 N2 M A* Size and Details

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TBS QJ 311 N2 M A* bearing

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TBS QJ 311 N2 M A* Bearing Details：

Bearing Name	QJ 311 N2 M A*
New Model	QJ311N2MA*
Old Model	bearing
product Model	QJ311N2MA*
Category	Angular Contact Ball Bearings
Brand	TBS Bearing
Inner Diameter d ( mm )	55
Outer Diameter D ( mm )	120
Thickness B ( mm )	29

TBS QJ 311 N2 M A* Bearing Bearing Size and Drawing：

TBS QJ 311 N2 M A* Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
NSK NU311 Bearing	55	120	29	NSK	Cylindrical Roller Bearings
NTN 6311 Bearing	55	120	29	NTN	Deep Groove Ball Bearings
TBS 1311 E TN9 Bearing	55	120	29	TBS	Self-aligning Ball Bearings
NACHI 6311-Z Bearing	55	120	29	NACHI	Deep Groove Ball Bearings
FLT NU 311 Bearing	55	120	29	FLT	Cylindrical Roller Bearings
ZKL NJ 311 Bearing	55	120	29	ZKL	Cylindrical Roller Bearings
TBS NU311ECML* Bearing	55	120	29	TBS	Cylindrical Roller Bearings
NACHI 31311 Bearing	55	120	29	NACHI	Tapered Roller Bearings
TBS *NJ311ECP Bearing	55	120	29	TBS	Cylindrical Roller Bearings
TBS 7311 BEC BJ Bearing	55	120	29	TBS	Angular Contact 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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