NTN 3311A Bearing_NTN 3311A Size and Details

NTN 3311A bearing

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NTN 3311A Bearing Details：

Bearing Name	3311A
New Model	3311A
Old Model	3256311 bearing
product Model	3311A
Category	Angular Contact Ball Bearings
Brand	NTN Bearing
Inner Diameter d ( mm )	55
Outer Diameter D ( mm )	120
Thickness B ( mm )	49.2

NTN 3311A Bearing Bearing Size and Drawing：

NTN 3311A Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
KOYO 3311 A-2Z Bearing	55	120	49.2	KOYO	Angular Contact Ball Bearings
SNR 3311 Bearing	55	120	49.2	SNR	Angular Contact Ball Bearings
TBS *3311A-2Z Bearing	55	120	49.2	TBS	Angular Contact Ball Bearings
TBS 3311 D TN9 Bearing	55	120	49.2	TBS	Angular Contact Ball Bearings
TBS 3311 D M A Bearing	55	120	49.2	TBS	Angular Contact Ball Bearings
MRC 3311 Bearing	55	120	49.2	MRC	Angular Contact Ball Bearings
NTN 3311 A Bearing	55	120	49.2	NTN	Angular Contact Ball Bearings
TBS 3311 D M A Bearing	55	120	49.2	TBS	Angular Contact Ball Bearings
KOYO 3311A Bearing	55	120	49.2	KOYO	Angular Contact Ball Bearings
TBS 3311A-2Z/MT33* Bearing	55	120	49.2	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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