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Super Precision Angular Contact Ball Bearings 71911 ACD/P4A

Super Precision Angular Contact Ball Bearings 71911 ACD/P4A

The 71911 ACD/P4A is a super precision angular contact ball bearing with a 55mm bore and 80mm outer diameter, crafted from high-quality chrome steel. Its 25° contact angle efficiently handles combined radial and thrust loads, making it versatile for demanding applications.

With a maximum speed of 24,000 RPM, it’s designed for high-speed operations while maintaining smooth performance. The phenolic cage ensures durability and reduces friction, enhancing its lifespan.

This open-type bearing comes pre-lubricated for immediate use and operates reliably in temperatures from -30°C to 110°C. Its P4 tolerance class (ABEC-7) guarantees exceptional precision.

Ideal for machine tools, spindles, or high-precision equipment where accuracy and speed are crucial. Weighing just 0.18kg, it’s lightweight yet robust for its size. Interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 71911 ACD/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.007mm to 0
  • Outer Dia 80 mm
  • Outer Dia Tolerance -0.007mm to 0
  • Width 13 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 23
  • Contact Angle 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 4095 lbf
  • Static Radial Load 3082 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 24000 rpm
  • Weight 0.18 kg
  • Price（$） 69.723
Super Precision Angular Contact Ball Bearings 71911 ACD/P4A dimension drawing
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Features

How Is 71911 ACD/P4A Bearing Engineered for Reliability?

71911 ACD/P4A Bearing features a 25° contact angle, optimised for handling combined radial and axial loads.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and wear.
With a dynamic radial load capacity of 4095 lbf, it performs reliably in demanding applications.
The P4 tolerance class guarantees high precision, making it suitable for critical tasks.

Application

Common Applications of 71911 ACD/P4A Bearing
71911 ACD/P4A Bearing is widely used in high-speed machine tools, where its precision angular contact design ensures accurate spindle rotation. The open seal type allows for efficient lubrication, making it suitable for continuous operation.

In robotics, 71911 ACD/P4A Bearing provides smooth motion control in articulated arms, thanks to its 25° contact angle. Its phenolic cage reduces friction, enhancing performance in automated systems.

For medical imaging devices, 71911 ACD/P4A Bearing’s P4 tolerance class guarantees minimal vibration, crucial for clear diagnostic results. The chrome steel construction also ensures long-term reliability in sterile environments.

Where Is 71911 ACD/P4A Bearing Used?
You’ll often find 71911 ACD/P4A Bearing in aerospace applications, such as helicopter rotor systems, where its high-speed capability is essential. The preload option further improves stability under varying loads.

In electric motors, 71911 ACD/P4A Bearing supports angular loads efficiently, reducing wear and tear. Its metric dimensions make it a versatile choice for both European and Asian motor designs.

Built for Heavy-Duty Use: 71911 ACD/P4A Bearing
71911 ACD/P4A Bearing excels in industrial pumps, handling radial and axial loads with ease. The lubricated design ensures consistent performance even in demanding conditions.

For CNC machinery, 71911 ACD/P4A Bearing’s precision engineering minimizes play, enhancing cutting accuracy. Its high dynamic radial load capacity makes it ideal for heavy milling operations.

Automotive vs Aerospace: Applications of 71911 ACD/P4A Bearing
In automotive transmissions, 71911 ACD/P4A Bearing manages angular loads smoothly, contributing to gear shifting precision. Its durability is key for high-mileage vehicles.

Aerospace systems benefit from 71911 ACD/P4A Bearing’s lightweight yet robust design, ensuring reliability in critical flight components. The temperature range suits both ground and high-altitude operations.

Q&A

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