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Super Precision Angular Contact Ball Bearings S71911 ACD/P4ADBB

Super Precision Angular Contact Ball Bearings S71911 ACD/P4ADBB

The S71911 ACD/P4ADBB 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 6660 lbf and spins smoothly at speeds up to 34,000 RPM.

Its sealed design keeps grease in and contaminants out, while the phenolic cage ensures quiet, long-lasting performance. The 25° contact angle and light preload make it ideal for high-precision applications.

This matched set of two bearings (DB arrangement) offers excellent stability under angular loads. Perfect for machine tools or high-speed spindles where accuracy is key.

Weighing just 0.37kg, it’s lightweight yet robust. Compliant with P4A tolerance standards for reliable performance. Works in temperatures from -30°C to 110°C.

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Product Parameters

  • Part Number S71911 ACD/P4ADBB
  • 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 23
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Sealed
  • 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 6660 lbf
  • Static Radial Load 6188 lbf
  • Lubrication Grease
  • Temperature Range - 30°C to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.37 kg
Super Precision Angular Contact Ball Bearings S71911 ACD/P4ADBB dimension drawing
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Features

Performance Features of S71911 ACD/P4ADBB Bearing

S71911 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 6660 lbf.

Its phenolic cage ensures smooth operation at high speeds, reaching up to 34,000 rpm.
The sealed design and grease lubrication reduce maintenance needs while maintaining performance.

With a precision tolerance class of P4A, S71911 ACD/P4ADBB Bearing delivers reliable accuracy.
The matched arrangement of two bearings provides stability in demanding conditions.

Application

Industrial Uses of S71911 ACD/P4ADBB Bearing
S71911 ACD/P4ADBB Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction helps maintain performance in environments with dust or debris.

Where Is S71911 ACD/P4ADBB Bearing Used?
In robotics, S71911 ACD/P4ADBB Bearing provides smooth motion control for articulated arms, thanks to its light preload and matched arrangement. The phenolic cage reduces friction, enhancing efficiency in repetitive tasks.

Optimized for Performance: S71911 ACD/P4ADBB Bearing
For medical imaging devices, S71911 ACD/P4ADBB Bearing offers reliable support with minimal vibration, crucial for clear diagnostic results. Its chrome steel rings and balls ensure long-lasting durability in demanding settings.

Automotive vs Aerospace: Applications of S71911 ACD/P4ADBB Bearing
In automotive applications, S71911 ACD/P4ADBB Bearing is ideal for high-speed gearboxes, where its grease lubrication reduces wear. For aerospace, its precision tolerances make it suitable for navigation systems requiring exact alignment.

Practical Applications of S71911 ACD/P4ADBB Bearing
S71911 ACD/P4ADBB Bearing works well in 3D printers, providing smooth linear motion for precise layering. The matched bearing set ensures consistent performance across multiple axes.

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