TBS 71921 AC Bearing_TBS 71921 AC Size and Details

TBS 71921 AC bearing

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TBS 71921 AC Bearing Details：

Bearing Name	71921 AC
New Model	71921AC
Old Model	1046921 bearing
product Model	71921AC
Category	Angular Contact Ball Bearings
Brand	TBS Bearing
Inner Diameter d ( mm )	105
Outer Diameter D ( mm )	145
Thickness B ( mm )	20

TBS 71921 AC Bearing Bearing Size and Drawing：

TBS 71921 AC Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
FAG B71921AC-2RZ/HQ1 Bearing	105	145	20	FAG	Angular Contact Ball Bearings
NTN 61921-2RZ Bearing	105	145	20	NTN	Deep Groove Ball Bearings
FAG B71921C-2RZ/HQ1 Bearing	105	145	20	FAG	Angular Contact Ball Bearings
KOYO 6921 ZZ Bearing	105	145	20	KOYO	Deep Groove Ball Bearings
KOYO 6921ZZ Bearing	105	145	20	KOYO	Deep Groove Ball Bearings
NSK 61921-RZ Bearing	105	145	20	NSK	Deep Groove Ball Bearings
TBS 71921 C Bearing	105	145	20	TBS	Angular Contact Ball Bearings
GMN 71921C Bearing	105	145	20	GMN	Angular Contact Ball Bearings
KOYO 61921-RS Bearing	105	145	20	KOYO	Deep Groove Ball Bearings
KOYO 61921 Bearing	105	145	20	KOYO	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：NSK 71908 AC
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