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Super Precision Angular Contact Ball Bearings 7028 CDGA/P4A

Super Precision Angular Contact Ball Bearings 7028 CDGA/P4A

The 7028 CDGA/P4A is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 34425 lbf and operates smoothly at speeds up to 6300 RPM.

With a 15° contact angle and open design, it offers excellent performance in high-precision applications. The phenolic cage ensures durability and reduces friction, while the extra light preload enhances stability.

This bearing is suitable for temperatures from -30°C to 110°C and comes lubricated for immediate use. Its P4A tolerance class guarantees precise alignment and reliable operation.

Ideal for machine tools or spindle applications where accuracy is key. Weighing 3.42kg, it’s robust yet manageable for its size. It can be arranged back-to-back, face-to-face, or tandem for versatile use.

Interchangeable with SKF bearings, it’s a practical choice for replacements or upgrades. Compliant with universal matching standards, it’s a dependable option for demanding setups.

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Product Parameters

  • Part Number 7028 CDGA/P4A
  • 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 33 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 22
  • Contact Angle 15°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 3
  • 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 34425 lbf
  • Static Radial Load 37350 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 6300 rpm
  • Weight 3.42 kg
  • Price（$） 689.571
Super Precision Angular Contact Ball Bearings 7028 CDGA/P4A dimension drawing
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Features

Performance Features of 7028 CDGA/P4A Bearing

7028 CDGA/P4A Bearing is crafted with chrome steel rings and balls, offering high precision and durability.
Its 15° contact angle ensures efficient handling of combined radial and axial loads.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance.
With a dynamic radial load capacity of 34425 lbf, it excels in demanding applications.

The P4A tolerance class guarantees superior precision, making it ideal for high-speed operations.
Its maximum speed of 6,300 rpm ensures reliable performance in various industrial settings.

Application

Industrial Uses of 7028 CDGA/P4A Bearing
This bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The extra light preload makes it suitable for applications requiring minimal friction and smooth operation.

In robotics, 7028 CDGA/P4A Bearing supports articulated arms, providing stability during precise movements. Its phenolic cage helps reduce weight while maintaining durability in continuous operation.

For aerospace components, 7028 CDGA/P4A Bearing handles radial loads efficiently, making it ideal for gearbox systems. The P4A tolerance class ensures consistent performance even under demanding conditions.

Automotive vs Aerospace: Applications of 7028 CDGA/P4A Bearing
In automotive systems, this bearing is often found in high-performance transmissions, where its chrome steel construction withstands heavy loads. The metric sizing ensures compatibility with various European designs.

For aerospace, 7028 CDGA/P4A Bearing excels in turbine engines, thanks to its ability to handle both radial and axial forces. The temperature range also makes it reliable in extreme operating environments.

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