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Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADGA

Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADGA

The 7028 ACD/P4ADGA is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from high-quality chrome steel. It measures 66mm in width and is designed for angular contact loads, offering smooth operation at speeds up to 11,000 RPM.

With a 25° contact angle and universal matching arrangement, this bearing provides excellent radial load capacity (52,650 lbf dynamic, 70,875 lbf static). The open design and phenolic cage ensure durability and easy maintenance.

Ideal for high-precision applications like machine tool spindles or robotics, this bearing works in temperatures from -30°C to 110°C. Its P4A tolerance class guarantees consistent performance.

Weighing 6.84kg, it comes in a matched set of two, suitable for back-to-back, face-to-face, or tandem arrangements. Compliant with industry standards, it’s interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 7028 ACD/P4ADGA
  • 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 Universal matching
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • 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
  • Price（$） 1185.651
Super Precision Angular Contact Ball Bearings 7028 ACD/P4ADGA dimension drawing
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Features

Performance Features of 7028 ACD/P4ADGA Bearing

7028 ACD/P4ADGA Bearing is crafted with chrome steel rings and balls, offering high precision for angular contact applications.

Its dynamic radial load capacity of 52,650 lbf ensures reliable performance under stress.

The phenolic cage maintains ball alignment, reducing friction and enhancing durability.

With a maximum speed of 11,000 rpm, it excels in high-speed operations while maintaining stability.

Application

Industrial Uses of 7028 ACD/P4ADGA Bearing
This bearing is commonly used in high-precision machine tools, where its 25° contact angle ensures accurate radial and axial load handling. The universal matching design allows for flexible arrangements in complex setups.

In robotics, 7028 ACD/P4ADGA Bearing supports articulated arms, providing smooth movement and low friction. Its phenolic cage helps reduce weight while maintaining durability in continuous operation.

For aerospace applications, 7028 ACD/P4ADGA Bearing’s P4A tolerance class makes it suitable for critical components like gyroscopes. The chrome steel construction ensures reliability under varying temperatures and loads.

Where Is 7028 ACD/P4ADGA Bearing Used?
You’ll find this bearing in CNC spindles, where its extra light preload enhances precision during high-speed cutting. The open seal design simplifies lubrication for extended service life.

In medical imaging devices, 7028 ACD/P4ADGA Bearing’s low vibration characteristics improve scan accuracy. Its matched set configuration ensures consistent performance in sensitive equipment.

Built for Heavy-Duty Use: 7028 ACD/P4ADGA Bearing
This model excels in industrial gearboxes, handling both radial and thrust loads with ease. The 22.225 mm balls distribute stress evenly for long-lasting performance.

In automation systems, 7028 ACD/P4ADGA Bearing’s tandem arrangement supports high-speed conveyor belts. The lubricated design reduces maintenance needs in dusty environments.

Automotive vs Aerospace: Applications of 7028 ACD/P4ADGA Bearing
In automotive testing rigs, this bearing withstands rigorous vibration analysis thanks to its phenolic cage. The 11,000 rpm rating suits dynamic simulation requirements.

For aircraft landing gear mechanisms, 7028 ACD/P4ADGA Bearing’s temperature tolerance ensures reliability from -30°C to 110°C. The matched set configuration provides balanced load distribution.

Q&A

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