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Super Precision Angular Contact Ball Bearings S7028 ACD/P4AQBCA

Super Precision Angular Contact Ball Bearings S7028 ACD/P4AQBCA

The S7028 ACD/P4AQBCA is a super precision angular contact ball bearing with a 140mm bore and 210mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 84825 lbf and operates smoothly at speeds up to 11000 RPM.

Its sealed design and phenolic cage ensure low friction and long service life, even in demanding conditions. The bearing comes preloaded for extra light performance, ideal for high-precision applications.

This set includes four matched bearings (QBC arrangement) for balanced load distribution. Suitable for machine tools or spindle systems where accuracy and reliability are crucial.

Weighing 13.8kg, it’s built to withstand temperatures from -30°C to 110°C. Compliant with P4A tolerance standards for consistent performance.

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Product Parameters

  • Part Number S7028 ACD/P4AQBCA
  • 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 132 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 Sealed
  • Matched Arrangement 4 bearings <<>> QBC
  • Number Of Bearings In Matched Set 4
  • 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 84825 lbf
  • Static Radial Load 141750 lbf
  • Lubrication Grease
  • Temperature Range - 30°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 13.8 kg
Super Precision Angular Contact Ball Bearings S7028 ACD/P4AQBCA dimension drawing
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Features

Performance Features of S7028 ACD/P4AQBCA Bearing

S7028 ACD/P4AQBCA Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
The chrome steel rings and balls enhance durability, supporting dynamic radial loads up to 84,825 lbf.

Its phenolic cage ensures smooth operation, reducing friction at high speeds up to 11,000 rpm.
The sealed design protects against contaminants, maintaining performance in various environments.

With a P4A tolerance class, S7028 ACD/P4AQBCA Bearing offers high precision for demanding tasks.
The extra light preload (Class A) ensures minimal resistance, improving efficiency.

S7028 ACD/P4AQBCA Bearing operates reliably in temperatures from -30°C to 110°C.
Its matched arrangement of four bearings provides balanced performance for complex applications.

Application

Industrial Uses of S7028 ACD/P4AQBCA Bearing
S7028 ACD/P4AQBCA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction keeps contaminants out, extending service life in demanding workshop conditions.

What Makes S7028 ACD/P4AQBCA Bearing a Preferred Choice?
In robotics, S7028 ACD/P4AQBCA Bearing provides smooth motion control for articulated arms, thanks to its phenolic cage reducing friction. The matched set of four bearings offers consistent performance in automated assembly lines.

Built for Heavy-Duty Use: S7028 ACD/P4AQBCA Bearing
This bearing handles substantial radial loads in industrial gearboxes, with its chrome steel construction standing up to continuous operation. The extra light preload makes it suitable for applications requiring minimal vibration.

Medical vs Industrial: Where S7028 ACD/P4AQBCA Bearing Excels
While S7028 ACD/P4AQBCA Bearing performs well in medical imaging equipment, its true strength lies in heavy industrial machinery. The P4A tolerance class ensures precision in both environments, but its grease lubrication suits factory settings better.

Automotive vs Aerospace: Applications of S7028 ACD/P4AQBCA Bearing
S7028 ACD/P4AQBCA Bearing finds use in performance car transmissions, though its high-speed capabilities make it equally valuable in aircraft auxiliary systems. The 25° contact angle balances thrust and radial load capacity effectively.

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