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Super Precision Angular Contact Ball Bearings 71928 ACD/P4ADBB

Super Precision Angular Contact Ball Bearings 71928 ACD/P4ADBB

The 71928 ACD/P4ADBB is a super precision angular contact ball bearing with a 140mm bore and 190mm outer diameter, crafted from high-quality chrome steel. It measures 140mm by 190mm by 48mm, making it a compact yet robust unit for demanding applications.

This bearing handles radial loads up to 32850 lbf and operates smoothly at speeds up to 11000 RPM. Its 25° contact angle and light preload ensure stable performance under angular loads.

The open design allows for easy lubrication, while the phenolic cage enhances durability. It comes as a matched set of two bearings, ideal for applications requiring high precision.

Suitable for use in machine tools or high-speed spindles, it performs reliably in temperatures from -30°C to 110°C. Weighing 3.3kg, it’s a sturdy choice for industrial settings.

This model is interchangeable with SKF bearings, offering a practical replacement option. Compliant with precision class P4A, it meets stringent accuracy standards.

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Product Parameters

  • Part Number 71928 ACD/P4ADBB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 140 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 190 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 48 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 15.875 mm
  • Ball Qty 29
  • 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 Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 32850 lbf
  • Static Radial Load 49500 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 3.3 kg
Super Precision Angular Contact Ball Bearings 71928 ACD/P4ADBB dimension drawing
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Features

How Does 71928 ACD/P4ADBB Bearing Reduce Friction?

71928 ACD/P4ADBB Bearing features a 25° contact angle, optimised for smooth angular contact performance.
Its chrome steel construction ensures durability while maintaining low friction during operation.

The phenolic cage helps reduce weight and friction, enhancing efficiency in high-speed applications.
With a maximum speed of 11,000 rpm, it delivers reliable performance under demanding conditions.

Precision-matched as a duplex set, 71928 ACD/P4ADBB Bearing ensures consistent load distribution.
This design minimises wear, extending the bearing’s service life in precision machinery.

Application

Common Applications of 71928 ACD/P4ADBB Bearing
71928 ACD/P4ADBB Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of two bearings provides stability for demanding operations.

In automotive applications, 71928 ACD/P4ADBB Bearing supports high-speed gearboxes, thanks to its light preload and phenolic cage. The P4A tolerance class makes it suitable for performance vehicles requiring minimal vibration.

For robotics, 71928 ACD/P4ADBB Bearing’s chrome steel construction handles repetitive movements with precision. Its open design allows for easy lubrication, extending service life in automated systems.

Medical imaging devices benefit from 71928 ACD/P4ADBB Bearing’s smooth operation and low noise. The 25° contact angle ensures reliable performance in sensitive equipment like MRI scanners.

In aerospace systems, 71928 ACD/P4ADBB Bearing’s high dynamic load capacity makes it ideal for flight control mechanisms. The metric sizing ensures compatibility with international aircraft components.

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