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Super Precision Angular Contact Ball Bearings 71948 CD/P4ADBA

Super Precision Angular Contact Ball Bearings 71948 CD/P4ADBA

The 71948 CD/P4ADBA is a super precision angular contact ball bearing with a 240mm bore and 320mm outer diameter, designed for high-performance applications. Its 15° contact angle and extra-light preload ensure smooth operation under radial loads up to 144,000 lbf.

Made from chrome steel with a phenolic cage, it offers durability and can handle speeds up to 7500 RPM. The open design allows for easy lubrication, extending its service life.

This matched set of two bearings (DB arrangement) is ideal for machine tools or spindles requiring tight tolerances (P4A class). It operates reliably in temperatures from -30°C to 110°C.

Weighing 17kg, it’s a robust choice for heavy-duty machinery. Interchangeable with SKF bearings, it simplifies replacements while maintaining precision.

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Product Parameters

  • Part Number 71948 CD/P4ADBA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 240 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 320 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 76 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 25.4 mm
  • Ball Qty 31
  • Contact Angle 15°
  • 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 Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 83475 lbf
  • Static Radial Load 144000 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 7500 rpm
  • Weight 17 kg
Super Precision Angular Contact Ball Bearings 71948 CD/P4ADBA dimension drawing
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Features

How Does 71948 CD/P4ADBA Bearing Ensure Precision in High-Speed Applications?

71948 CD/P4ADBA Bearing features a 15° contact angle, optimised for angular contact loads and high-speed performance.
The chrome steel rings and balls provide excellent durability, supporting dynamic radial loads up to 83,475 lbf.

With a phenolic cage, 71948 CD/P4ADBA Bearing maintains ball alignment, reducing friction and wear.
Its P4A tolerance class ensures consistent precision, even at speeds up to 7,500 rpm.

The matched arrangement of two bearings enhances stability, making it suitable for demanding applications.
Operating between -30°C to 110°C, it performs reliably in varied temperature conditions.

Application

Industrial Uses of 71948 CD/P4ADBA Bearing
71948 CD/P4ADBA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of two bearings provides stability in heavy cutting operations.

In aerospace applications, 71948 CD/P4ADBA Bearing supports components like helicopter transmissions, thanks to its extra light preload and high dynamic radial load capacity. The phenolic cage reduces friction, making it suitable for high-speed scenarios.

For automation systems, 71948 CD/P4ADBA Bearing is ideal for robotic arms, where its P4A tolerance class guarantees consistent performance. The chrome steel construction ensures durability in continuous operation.

Medical imaging devices benefit from 71948 CD/P4ADBA Bearing’s precision, as it maintains smooth rotation in MRI scanners. The open design allows for easy lubrication, extending service life in critical environments.

In wind turbines, 71948 CD/P4ADBA Bearing handles radial and axial loads efficiently, thanks to its 15° contact angle. The metric sizing ensures compatibility with European and Asian turbine designs.

Q&A

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