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Super Precision Angular Contact Ball Bearings 71921 ACDGB/P4A

Super Precision Angular Contact Ball Bearings 71921 ACDGB/P4A

The 71921 ACDGB/P4A is a super precision angular contact ball bearing with a 105mm bore and 145mm outer diameter, crafted from sturdy chrome steel. It handles radial loads up to 12870 lbf and operates smoothly at speeds up to 16000 RPM.

With a 25° contact angle and light preload, it offers excellent accuracy for high-performance applications. The phenolic cage ensures durability while keeping the weight low at just 0.82kg.

This open-design bearing works in temperatures from -30°C to 110°C and comes lubricated for immediate use. It’s part of a universal matching set, suitable for back-to-back, face-to-face, or tandem arrangements.

Ideal for precision machinery like spindles or CNC equipment where tight tolerances (P4A class) and high speeds are required. Interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 71921 ACDGB/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 145 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 27
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 12870 lbf
  • Static Radial Load 14738 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.82 kg
Super Precision Angular Contact Ball Bearings 71921 ACDGB/P4A dimension drawing
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Features

Performance Features of 71921 ACDGB/P4A Bearing

71921 ACDGB/P4A Bearing is crafted with a 25° contact angle, ideal for handling combined radial and axial loads.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction for smoother operation.

The bearing’s P4A tolerance class guarantees high precision, making it suitable for demanding applications.
With a dynamic radial load capacity of 12870 lbf, it performs reliably under heavy loads.

71921 ACDGB/P4A Bearing can operate at speeds up to 16,000 rpm, balancing speed and stability.
Its universal matching capability allows flexible arrangement in back-to-back, face-to-face, or tandem configurations.

Application

Industrial Uses of 71921 ACDGB/P4A Bearing
71921 ACDGB/P4A Bearing is commonly used in high-speed machine tools, where its precision angular contact design ensures accurate spindle rotation. The light preload and P4A tolerance class make it suitable for applications demanding minimal vibration.

In automotive systems, 71921 ACDGB/P4A Bearing supports components like turbochargers and electric motors, handling both radial and axial loads efficiently. Its chrome steel construction provides durability under high-speed conditions.

For robotics, 71921 ACDGB/P4A Bearing’s phenolic cage reduces friction, making it ideal for articulated arms and precision movements. The open design allows for easy lubrication, extending service life in continuous operation.

Medical imaging devices benefit from 71921 ACDGB/P4A Bearing’s consistent performance and low noise levels. The 25° contact angle ensures smooth rotation in sensitive equipment like CT scanners.

In aerospace applications, 71921 ACDGB/P4A Bearing’s ability to handle tandem or back-to-back arrangements makes it versatile for flight control systems. The metric sizing ensures compatibility with international standards.

Q&A

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