ZKL 7221 B Bearing_ZKL 7221 B Size and Details

ZKL 7221 B bearing

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ZKL 7221 B Bearing Details：

Bearing Name	7221 B
New Model	7221B
Old Model	66221 bearing
product Model	7221B
Category	Angular Contact Ball Bearings
Brand	ZKL Bearing
Inner Diameter d ( mm )	105
Outer Diameter D ( mm )	190
Thickness B ( mm )	36

ZKL 7221 B Bearing Bearing Size and Drawing：

ZKL 7221 B Bearing With size alternative model

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
NSK 6221-2Z Bearing	105	190	36	NSK	Deep Groove Ball Bearings
FAG 7221AC Bearing	105	190	36	FAG	Angular Contact Ball Bearings
NSK QJ221 Bearing	105	190	36	NSK	Angular Contact Ball Bearings
KOYO N221 Bearing	105	190	36	KOYO	Cylindrical Roller Bearings
NTN 1221 Bearing	105	190	36	NTN	Self-aligning Ball Bearings
FAG NJ 315 +HJ 317 Bearing	105	190	36	FAG	Cylindrical Roller Bearings
FAG NUP221E Bearing	105	190	36	FAG	Cylindrical Roller Bearings
KOYO 6221-2RS Bearing	105	190	36	KOYO	Deep Groove Ball Bearings
NSK 7221 C Bearing	105	190	36	NSK	Angular Contact Ball Bearings
NTN NF221 Bearing	105	190	36	NTN	Cylindrical 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.

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