7222 CD/P4AQBCA

7222 CD/P4AQBCA

These sets of four matched super-precision angular contact ball bearings are available as universally matchable bearings or in preconfigured arrangements. Sets of four bearings arranged in tandem need to be mounted against a single bearing, or a set of bearings in tandem, to achieve the desired preload. All the other arrangements are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings.Very high running accuracyHigh axial and radial stiffnessHigh axial and radial load carrying capacity
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Dimensions - 7222 CD/P4AQBCA

d

110 mm

D

200 mm

B

152 mm

d1

138.7 mm

r1,2

min.2.1 mm

r3,4

min.1.1 mm

Abutment dimensions - 7222 CD/P4AQBCAAbutment dimensions - 7222 CD/P4AQBCA

da

min.122 mm

Db

max.193 mm

ra

max.2 mm

rb

max.1 mm

dn

145.9 mm

C

468 kN

C0

670 kN

Pu

22.4 kN

 

To be calculated: Single bearing (7000) x speed reduction factor (see table below)

Attainable speed for oil-air lubrication  

To be calculated: Single bearing (11000) x speed reduction factor (see table below)

15 degree

Dw

26.988 mm

i

4

z

16

G

54.15 cm³

Preload and stiffness (back-to-back, face-to-face)
 

A

G

1 340 N

 

270 N/µm

f

1.08

f1

1

f2A

1

f

1

 

Precision contact bearings are engineered with exceptional accuracy to ensure optimal performance in various mechanical applications. These bearings feature tight dimensional tolerances and precise geometric shapes, which contribute to their high rotational accuracy and low noise levels. The materials used in their construction, often high-quality steels or ceramics, are chosen for their durability and resistance to wear, ensuring long service life even under demanding conditions. Precision contact bearings typically include configurations such as ball bearings, roller bearings, and needle bearings, each designed to address specific load and speed requirements. Their design also incorporates advanced lubrication systems to reduce friction and heat generation, thereby enhancing efficiency and reliability.

The primary advantage of precision contact bearings lies in their ability to sustain high precision under various operating conditions. They offer superior load-carrying capacity, making them ideal for applications requiring heavy loads while maintaining high speeds. The precision of these bearings minimizes vibration and noise, which is critical in sensitive environments such as medical equipment or precision instruments. Additionally, their robust construction ensures reliability and longevity, reducing maintenance costs and downtime. The use of advanced materials and lubrication techniques further enhances their performance, providing resistance to corrosion and wear. This combination of features makes precision contact bearings an indispensable component in precision engineering and high-performance machinery.

Precision contact bearings are widely applied in a variety of industries due to their exceptional performance characteristics. In the automotive sector, they are crucial for the smooth operation of engines, transmissions, and suspension systems, ensuring reliability and fuel efficiency. Aerospace applications utilize these bearings for their ability to withstand extreme conditions and high speeds, contributing to the safety and efficiency of aircraft. Industrial machinery, such as CNC machines and robotics, benefit from the high precision and durability of these bearings, enabling consistent and accurate operations. Medical devices, which demand minimal noise and vibration, also rely on precision contact bearings to ensure patient comfort and device effectiveness. Overall, the versatility and reliability of precision contact bearings make them essential in numerous high-precision and high-performance applications across different sectors.

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