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Super Precision Angular Contact Ball Bearings S7028 CD/P4A

Super Precision Angular Contact Ball Bearings S7028 CD/P4A

The S7028 CD/P4A is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from robust chrome steel. Its 15° contact angle efficiently handles both radial and axial loads, supporting up to 34425 lbf dynamically.

Sealed for protection, this bearing comes pre-lubricated and maintains smooth operation at speeds up to 6700 RPM. The phenolic cage enhances durability while keeping noise levels low.

With a tight P4 tolerance class, it ensures high accuracy for demanding applications. Ideal for machine tools or high-speed spindles where precision is key.

Weighing 3.44kg, it’s built to last in temperatures from -30°C to 110°C. Compatible with SKF models for easy replacement.

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Product Parameters

  • Part Number S7028 CD/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 140 mm
  • Bore Dia Tolerance -0.01mm to 0
  • Outer Dia 210 mm
  • Outer Dia Tolerance -0.011mm to 0
  • Width 33 mm
  • Width Tolerance -0.24mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 22
  • Contact Angle 15°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement No
  • Preload Available
  • 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° to 110 °C
  • Max Speed 6700 rpm
  • Weight 3.44 kg
  • Price（$） 286.731
Super Precision Angular Contact Ball Bearings S7028 CD/P4A dimension drawing
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Features

Performance Features of S7028 CD/P4A Bearing

S7028 CD/P4A Bearing is designed with a 15° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage enhances stability at high speeds.

The bearing’s P4 tolerance class (ABEC-7) guarantees precision, making it suitable for high-accuracy machinery.
With a dynamic radial load capacity of 34,425 lbf, it handles demanding operational conditions reliably.

S7028 CD/P4A Bearing operates smoothly at speeds up to 6,700 rpm, maintaining performance within -30° to 110°C.
Its sealed design and preload availability further enhance its suitability for precision engineering tasks.

Application

Common Applications of S7028 CD/P4A Bearing
S7028 CD/P4A Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction helps maintain lubrication, reducing maintenance needs in demanding industrial environments.

In aerospace applications, S7028 CD/P4A Bearing supports critical components like helicopter rotor systems, thanks to its ability to handle both radial and axial loads. The phenolic cage adds durability while keeping weight low, which is essential for flight performance.

For automation equipment, S7028 CD/P4A Bearing provides reliable performance in robotic arms and CNC machines. Its P4 tolerance class ensures minimal vibration, making it ideal for tasks requiring high precision and repeatability.

Medical imaging devices also benefit from S7028 CD/P4A Bearing’s smooth operation and low noise levels. The chrome steel construction offers long service life, even in continuous-use scenarios like MRI scanners.

In electric motors, S7028 CD/P4A Bearing’s lubricated design helps reduce friction, improving efficiency and extending operational life. Its 15° contact angle is particularly suited for high-speed applications, such as industrial fans or pumps.

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