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Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBB

Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBB

The 71948 ACD/P4ADBB is a super precision angular contact ball bearing with a 240mm bore and 320mm outer diameter, crafted from high-quality chrome steel. Its 25° contact angle and matched arrangement of two bearings ensure smooth handling of radial loads up to 78975 lbf.

Designed for high-speed operations, it spins efficiently at up to 7500 RPM and works in temperatures from -30°C to 110°C. The phenolic cage adds durability while keeping the bearing lightweight for its size.

This bearing is ideal for precision applications like machine tool spindles or high-performance industrial equipment. Its P4A tolerance class guarantees exceptional accuracy and reliability.

Weighing 17kg, it’s robust yet manageable for installation. The open design allows easy lubrication, extending its service life. Compatible with SKF bearings, it’s a practical choice for replacements or upgrades.

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Product Parameters

  • Part Number 71948 ACD/P4ADBB
  • 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 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 78975 lbf
  • Static Radial Load 137250 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 7500 rpm
  • Weight 17 kg
Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBB dimension drawing
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Features

Performance Features of 71948 ACD/P4ADBB Bearing

71948 ACD/P4ADBB 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 78,975 lbf.

With a phenolic cage, it ensures smooth operation and reduced friction at high speeds.

Its precision P4A tolerance class guarantees reliable performance in demanding conditions.

Application

Key Fields for 71948 ACD/P4ADBB Bearing
71948 ACD/P4ADBB 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 demanding machining operations.

In aerospace applications, 71948 ACD/P4ADBB Bearing handles radial and axial loads in turbine systems, thanks to its chrome steel construction. Its light preload setting helps maintain performance under varying operational conditions.

For robotics, 71948 ACD/P4ADBB Bearing offers smooth motion in articulated arms, with its phenolic cage reducing friction. The P4A tolerance class ensures consistent precision in automated tasks.

Automotive vs Aerospace: Applications of 71948 ACD/P4ADBB Bearing
In automotive systems, 71948 ACD/P4ADBB Bearing supports high-performance gearboxes, where its dynamic load capacity is essential. The metric sizing makes it compatible with European engineering standards.

Aerospace applications benefit from 71948 ACD/P4ADBB Bearing’s ability to withstand extreme temperatures and loads. Its open design allows for effective lubrication in critical flight components.

Industrial Uses of 71948 ACD/P4ADBB Bearing
71948 ACD/P4ADBB Bearing is ideal for heavy-duty pumps, where its phenolic cage resists corrosion in wet environments. The 25° contact angle optimises load distribution for longer service life.

In printing machinery, 71948 ACD/P4ADBB Bearing ensures precise paper handling with minimal vibration. Its high-speed capability makes it suitable for modern, fast-paced production lines.

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