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Super Precision Angular Contact Ball Bearings 71911 ACE/P4AH1DBA

Super Precision Angular Contact Ball Bearings 71911 ACE/P4AH1DBA

The 71911 ACE/P4AH1DBA is a super precision angular contact ball bearing with a 55mm bore and 80mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 5355 lbf and spins smoothly at speeds up to 39,000 RPM.

Its 25° contact angle and matched arrangement (2 bearings) provide excellent stability for angular loads. The phenolic cage ensures quiet operation and long service life.

This bearing comes pre-lubricated and operates in temperatures from -30°C to 110°C. With P4A tolerance class, it offers high precision for demanding applications.

Ideal for machine tools or high-speed spindles where accuracy is crucial. Weighing 0.34kg, it’s a robust yet lightweight solution for precision engineering.

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Product Parameters

  • Part Number 71911 ACE/P4AH1DBA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 80 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 26 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 21
  • 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 Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 5355 lbf
  • Static Radial Load 4500 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 39000 rpm
  • Weight 0.34 kg
Super Precision Angular Contact Ball Bearings 71911 ACE/P4AH1DBA dimension drawing
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Features

Performance Features of 71911 ACE/P4AH1DBA Bearing

71911 ACE/P4AH1DBA 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 for smoother operation.

The extra light preload (Class A) enhances precision, making it suitable for high-speed applications up to 39,000 rpm.

With a dynamic radial load capacity of 5355 lbf, it delivers reliable performance in demanding conditions.

Application

Common Applications of 71911 ACE/P4AH1DBA Bearing
71911 ACE/P4AH1DBA Bearing is widely used in machine tools, where its high precision and angular contact design ensure accurate spindle rotation. The matched arrangement of two bearings provides stability in high-speed operations.
In automotive applications, 71911 ACE/P4AH1DBA Bearing supports components like wheel hubs and transmissions, thanks to its extra light preload and durable chrome steel construction. The phenolic cage reduces friction, enhancing performance.
For robotics, 71911 ACE/P4AH1DBA Bearing’s open design and high-speed capability make it ideal for precise movements in robotic arms. The P4A tolerance class ensures consistent performance in demanding environments.

How Does 71911 ACE/P4AH1DBA Bearing Improve Performance?
71911 ACE/P4AH1DBA Bearing enhances performance in industrial fans by reducing vibration and noise, thanks to its balanced design and high-quality materials. The 25° contact angle helps manage both radial and axial loads effectively.
In medical imaging devices, 71911 ACE/P4AH1DBA Bearing’s precision and smooth operation contribute to clearer scans and reliable functionality. The lubricated design ensures long-term performance with minimal maintenance.

Built for Heavy-Duty Use: 71911 ACE/P4AH1DBA Bearing
71911 ACE/P4AH1DBA Bearing is a reliable choice for conveyor systems, where its dynamic radial load capacity handles continuous operation. The chrome steel rings and balls provide durability in harsh conditions.
For 3D printers, 71911 ACE/P4AH1DBA Bearing’s high-speed capability and precision ensure smooth and accurate print head movements. The matched set configuration adds extra stability for detailed prints.

Automotive vs Aerospace: Applications of 71911 ACE/P4AH1DBA Bearing
In automotive systems, 71911 ACE/P4AH1DBA Bearing is often used in transmissions for its ability to handle high speeds and loads. The phenolic cage reduces wear, extending the bearing’s lifespan.
In aerospace, 71911 ACE/P4AH1DBA Bearing’s precision and reliability make it suitable for flight control systems. The P4A tolerance class ensures it meets stringent industry standards for performance and safety.

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