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Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADBB

Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADBB

The 7028 ACD/P4ADBB is a super precision angular contact ball bearing measuring 140mm by 210mm by 66mm, crafted from durable chrome steel. It features a 25° contact angle and comes as a matched pair for balanced performance.

This bearing handles radial loads up to 52650 lbf and operates smoothly at speeds up to 11000 RPM. Its phenolic cage ensures quiet running and long service life, even in demanding conditions.

The open design allows for easy lubrication, while the P4A tolerance class guarantees high precision. Ideal for machine tools or high-speed spindles where accuracy is crucial.

Weighing 6.84kg, this pair is robust yet manageable for installation. Suitable for temperatures from -30°C to 110°C, making it versatile for various industrial applications.

Compatible with SKF bearings, it offers a reliable replacement option. The light preload ensures smooth operation without excessive friction.

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Product Parameters

  • Part Number 7028 ACD/P4ADBB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 140 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 210 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 66 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 22
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 2 bearings <> DB
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing No
  • Preload Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 52650 lbf
  • Static Radial Load 70875 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 6.84 kg
Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADBB dimension drawing
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Features

Performance Features of 7028 ACD/P4ADBB Bearing

7028 ACD/P4ADBB Bearing is designed with a 25° contact angle, optimising load distribution for precision applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and noise.

The matched arrangement of two bearings enhances stability, making it suitable for high-speed operations.
With a maximum speed of 11,000 rpm, it delivers reliable performance in demanding conditions.

7028 ACD/P4ADBB Bearing’s light preload class B ensures smooth operation and extended service life.
Its dynamic radial load capacity of 52,650 lbf makes it ideal for heavy-duty applications.

Application

Industrial Uses of 7028 ACD/P4ADBB Bearing
This bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of two bearings provides stability in heavy cutting operations.

In aerospace applications, 7028 ACD/P4ADBB Bearing handles both radial and axial loads in aircraft landing gear systems. Its phenolic cage offers lightweight durability, which is essential for flight performance.

For robotics, 7028 ACD/P4ADBB Bearing’s light preload and P4A tolerance class make it ideal for articulated arms requiring smooth, precise movement. The chrome steel construction also resists wear in continuous operation.

Where Is 7028 ACD/P4ADBB Bearing Used?
You’ll often find this bearing in CNC lathes, where its high-speed capability and precision are crucial for fine machining. The open design allows for efficient lubrication during long runs.

In electric vehicle motors, 7028 ACD/P4ADBB Bearing supports high RPM performance while managing angular loads. Its metric sizing ensures compatibility with European and Asian motor designs.

Built for Heavy-Duty Use: 7028 ACD/P4ADBB Bearing
This bearing excels in industrial pumps, handling both radial and thrust loads with reliability. The chrome steel balls and rings provide long service life even in demanding conditions.

For wind turbine gearboxes, 7028 ACD/P4ADBB Bearing’s matched set design distributes loads evenly. Its temperature range also makes it suitable for outdoor applications in varying climates.

Automotive vs Aerospace: Applications of 7028 ACD/P4ADBB Bearing
In automotive testing equipment, this bearing ensures precise measurements due to its P4A tolerance class. The light preload reduces friction during high-speed testing.

For satellite positioning systems, 7028 ACD/P4ADBB Bearing’s angular contact design maintains accuracy under dynamic loads. The phenolic cage minimises weight without sacrificing strength.

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