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Super Precision Angular Contact Ball Bearings 71938 ACD/P4ADBB

Super Precision Angular Contact Ball Bearings 71938 ACD/P4ADBB

The 71938 ACD/P4ADBB is a super precision angular contact ball bearing with a 190mm bore and 260mm outer diameter, designed for high accuracy applications. Its 25° contact angle and light preload ensure smooth operation under radial and axial loads.

Made from chrome steel with a phenolic cage, it handles dynamic radial loads up to 58500 lbf and reaches speeds of 11000 RPM. The open design allows easy lubrication, while the matched pair arrangement (DB) enhances stability.

Ideal for machine tools or precision spindles where tight tolerances (P4A class) are crucial. It operates in temperatures from -30°C to 110°C and weighs 8.7kg, offering a robust yet precise solution.

This model is interchangeable with SKF bearings, making it a reliable choice for replacements or upgrades in demanding industrial settings.

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Product Parameters

  • Part Number 71938 ACD/P4ADBB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 190 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 260 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 66 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 28
  • 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 58500 lbf
  • Static Radial Load 93375 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 8.7 kg
Super Precision Angular Contact Ball Bearings 71938 ACD/P4ADBB dimension drawing
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Features

Performance Features of 71938 ACD/P4ADBB Bearing

71938 ACD/P4ADBB Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and noise.

The matched arrangement of two bearings provides balanced performance, suitable for high-precision tasks.
With a dynamic radial load capacity of 58,500 lbf, it handles demanding conditions reliably.

71938 ACD/P4ADBB Bearing operates smoothly at speeds up to 11,000 rpm, maintaining efficiency.
Its P4A tolerance class guarantees precision, making it ideal for applications requiring tight tolerances.

The open design allows for easy lubrication, ensuring consistent performance over time.
Weighing 8.7 kg, it offers a robust yet manageable solution for industrial machinery.

Application

Industrial Uses of 71938 ACD/P4ADBB Bearing
71938 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 industrial environments.

In automotive applications, 71938 ACD/P4ADBB Bearing supports high-performance gearboxes, handling both radial and axial loads efficiently. Its light preload and phenolic cage make it suitable for smooth, low-friction operation.

For medical imaging devices, 71938 ACD/P4ADBB Bearing’s chrome steel construction offers reliability and long service life. The P4A tolerance class ensures the precision needed for sensitive diagnostic equipment.

Automation systems benefit from 71938 ACD/P4ADBB Bearing’s ability to handle high speeds, making it ideal for robotic arms and CNC machinery. The open design allows for easy lubrication and maintenance.

In consumer electronics, 71938 ACD/P4ADBB Bearing can be found in high-end printers, where its durability and precision contribute to consistent performance. The metric sizing ensures compatibility with various European and Asian models.

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