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Super Precision Angular Contact Ball Bearings 71911 ACD/P4ADBC

Super Precision Angular Contact Ball Bearings 71911 ACD/P4ADBC

The 71911 ACD/P4ADBC 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 operates smoothly at speeds up to 34,000 RPM.

With a 25° contact angle and moderate preload, it offers excellent stability for high-precision applications. The open design and phenolic cage ensure reliable performance under demanding conditions.

This matched set of two bearings (DB arrangement) is ideal for machine tools or spindle drives where accuracy is key. It works in temperatures from -30°C to 110°C.

Weighing 0.36kg, it’s a robust yet lightweight choice for industrial use. Compatible with SKF bearings for easy replacement, and meets P4A tolerance standards.

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Product Parameters

  • Part Number 71911 ACD/P4ADBC
  • 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 Open
  • Matched Arrangement 2 bearings <> DB
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing No
  • Preload Moderate / Class C
  • 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 Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.36 kg
Super Precision Angular Contact Ball Bearings 71911 ACD/P4ADBC dimension drawing
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Features

Performance Features of 71911 ACD/P4ADBC Bearing

71911 ACD/P4ADBC Bearing is designed with a 25° contact angle, ideal for handling combined radial and axial loads.
Its chrome steel construction ensures durability and resistance to wear in high-speed applications.

The matched arrangement of two bearings provides balanced load distribution and improved stability.
With a maximum speed of 34,000 rpm, it delivers reliable performance in precision tasks.

Phenolic cage material reduces friction and enhances smooth operation.
Moderate preload (Class C) ensures consistent performance under varying load conditions.

The P4A tolerance class guarantees high precision and tight dimensional control.
Its open design allows for easy lubrication, maintaining optimal performance over time.

Application

Industrial Uses of 71911 ACD/P4ADBC Bearing
71911 ACD/P4ADBC Bearing is commonly used in high-precision machine tools, where its moderate preload and 25° contact angle ensure accurate spindle rotation. The matched arrangement of two bearings provides stability in demanding industrial environments.

What Makes 71911 ACD/P4ADBC Bearing a Preferred Choice?
In robotics and automation, 71911 ACD/P4ADBC Bearing excels in robotic arms and CNC machinery due to its phenolic cage and chrome steel construction. The open design allows for easy lubrication, extending service life in continuous operation.

Perfect Fit for Automation: 71911 ACD/P4ADBC Bearing
For 3D printers and automated production lines, 71911 ACD/P4ADBC Bearing offers reliable performance with its P4A tolerance class. The high-speed capability makes it suitable for applications requiring both precision and speed.

Automotive vs Aerospace: Applications of 71911 ACD/P4ADBC Bearing
In automotive transmissions, 71911 ACD/P4ADBC Bearing handles angular loads efficiently, while in aerospace, its lightweight design and high-speed performance are valued. The metric sizing ensures compatibility across various industries.

Where Is 71911 ACD/P4ADBC Bearing Used?
Medical imaging devices benefit from 71911 ACD/P4ADBC Bearing’s smooth operation and low vibration. The chrome steel balls and rings provide durability in critical healthcare equipment.

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