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Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADBA

Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADBA

The 7028 ACD/P4ADBA is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, measuring 66mm in width. Made from chrome steel, it’s designed for high-performance applications with a 25° contact angle.

This bearing handles radial loads up to 52650 lbf and operates smoothly at speeds up to 11000 RPM. Its extra light preload (Class A) ensures minimal friction and precise movement.

The open design and phenolic cage make it easy to maintain, while the matched pair (DB arrangement) provides stability. It works in temperatures from -30°C to 110°C.

Ideal for machine tools or high-speed spindles where precision is key. Weighing 6.84kg, it’s robust yet manageable for its size. Interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 7028 ACD/P4ADBA
  • 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 Extra light / Class A
  • 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/P4ADBA dimension drawing
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Features

Performance Features of 7028 ACD/P4ADBA Bearing

7028 ACD/P4ADBA 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 provides extra stability, ideal for high-speed operations.
With a dynamic radial load capacity of 52,650 lbf, it handles demanding conditions effortlessly.

Operating at speeds up to 11,000 rpm, 7028 ACD/P4ADBA Bearing maintains performance in temperatures from -30°C to 110°C.
Its P4A tolerance class guarantees precision, making it suitable for critical applications.

The open design allows easy lubrication, ensuring smooth operation and extended service life.
Weighing 6.84 kg, it balances strength and efficiency without compromising on reliability.

Application

Industrial Uses of 7028 ACD/P4ADBA Bearing
The 7028 ACD/P4ADBA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. Its phenolic cage and chrome steel construction provide stability under heavy radial loads.

In robotics, 7028 ACD/P4ADBA Bearing supports articulated arms, offering smooth movement and long service life. The matched arrangement of two bearings enhances load distribution in dynamic applications.

For aerospace components, 7028 ACD/P4ADBA Bearing’s P4A tolerance class makes it suitable for navigation systems requiring minimal vibration. The extra light preload further optimises performance in high-speed scenarios.

Where Is 7028 ACD/P4ADBA Bearing Used?
You’ll often find 7028 ACD/P4ADBA Bearing in CNC machining centres, where its 25° contact angle improves rigidity during cutting operations. The open seal design allows for efficient lubrication management.

In electric vehicle motors, 7028 ACD/P4ADBA Bearing handles combined loads while maintaining energy efficiency. Its metric dimensions make it a straightforward replacement for various European-designed systems.

Built for Heavy-Duty Use: 7028 ACD/P4ADBA Bearing
The 7028 ACD/P4ADBA Bearing excels in industrial pumps, withstanding constant radial forces without compromising precision. Its 11,000 rpm maximum speed suits demanding fluid handling applications.

For printing machinery, 7028 ACD/P4ADBA Bearing’s consistent performance ensures accurate colour registration. The phenolic cage reduces friction during high-speed paper feed operations.

Automotive vs Aerospace: Applications of 7028 ACD/P4ADBA Bearing
In automotive testing equipment, 7028 ACD/P4ADBA Bearing provides reliable support for dynamometer shafts. Its temperature range accommodates both cold starts and prolonged high-load sessions.

For satellite antenna mechanisms, 7028 ACD/P4ADBA Bearing’s precision maintains signal alignment. The matched bearing set eliminates play in critical positioning systems.

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