NTN QJ 208 Bearing_NTN QJ 208 Size and Details

NTN QJ 208 bearing

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NTN QJ 208 Bearing Details：

Bearing Name	QJ 208
New Model	QJ208
Old Model	176208 bearing
product Model	QJ208
Category	Angular Contact Ball Bearings
Brand	NTN Bearing
Inner Diameter d ( mm )	40
Outer Diameter D ( mm )	80
Thickness B ( mm )	18

NTN QJ 208 Bearing Bearing Size and Drawing：

NTN QJ 208 Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
SNR 6208-RS Bearing	40	80	18	SNR	Deep Groove Ball Bearings
SNR 1208K Bearing	40	80	18	SNR	Self-aligning Ball Bearings
TBS 7208BEP Bearing	40	80	18	TBS	Angular Contact Ball Bearings
NTN NU 208 Bearing	40	80	18	NTN	Cylindrical Roller Bearings
TBS 7208BECBJ Bearing	40	80	18	TBS	Angular Contact Ball Bearings
KOYO 6208-2RZ Bearing	40	80	18	KOYO	Deep Groove Ball Bearings
TORRINGTON 6208 Bearing	40	80	18	TORRINGTON	Deep Groove Ball Bearings
TBS 6208N Bearing	40	80	18	TBS	Deep Groove Ball Bearings
FAG 6208-Z Bearing	40	80	18	FAG	Deep Groove Ball Bearings
NTN QJ208 Bearing	40	80	18	NTN	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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