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Super Precision Angular Contact Ball Bearings 71811 ACD/P4DBC

Super Precision Angular Contact Ball Bearings 71811 ACD/P4DBC

The 71811 ACD/P4DBC is a super precision angular contact ball bearing, measuring 55mm by 72mm by 18mm. Made from chrome steel, it features a 25° contact angle and comes as a matched pair for balanced performance.

It handles dynamic radial loads up to 3510 lbf and spins smoothly at speeds up to 34,000 RPM. The phenolic cage ensures quiet operation, while the open design allows easy lubrication.

This bearing is ideal for high-precision applications like machine tools or spindles, where moderate preload is needed. Its P4 tolerance class guarantees consistent accuracy under load.

Weighing just 0.16kg, it’s lightweight yet robust. Compatible with SKF bearings, it’s a reliable choice for replacements. Works well in temperatures from -30°C to 110°C.

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Product Parameters

  • Part Number 71811 ACD/P4DBC
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 72 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 18 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 29
  • Contact Angle 25°
  • Tolerance Class P4
  • 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 3510 lbf
  • Static Radial Load 4590 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.16 kg
Super Precision Angular Contact Ball Bearings 71811 ACD/P4DBC dimension drawing
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Features

Performance Features of 71811 ACD/P4DBC Bearing

71811 ACD/P4DBC 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 enhances performance at high speeds.

The bearing can handle dynamic radial loads up to 3510 lbf, making it suitable for demanding tasks.
With a maximum speed of 34,000 rpm, it balances efficiency and reliability.

71811 ACD/P4DBC Bearing operates in temperatures from -30°C to 110°C, ensuring versatility.
Its precision P4 tolerance class guarantees consistent performance in critical applications.

The matched arrangement of two bearings provides stability and reduces operational stress.
Moderate preload (Class C) ensures smooth operation and extended service life.

Application

Common Applications of 71811 ACD/P4DBC Bearing
71811 ACD/P4DBC Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The moderate preload helps maintain stability during heavy cutting operations.

In robotics, 71811 ACD/P4DBC Bearing supports articulated arms, providing smooth movement and long service life. Its phenolic cage reduces friction, making it ideal for repetitive motions.

For aerospace applications, 71811 ACD/P4DBC Bearing handles both radial and axial loads in components like landing gear systems. The P4 tolerance class guarantees consistent performance under demanding conditions.

Where Is 71811 ACD/P4DBC Bearing Used?
You’ll often find 71811 ACD/P4DBC Bearing in CNC machinery, where its high-speed capability and precision are essential. The matched bearing arrangement enhances load distribution for better durability.

In medical imaging devices, 71811 ACD/P4DBC Bearing ensures quiet and vibration-free operation. The chrome steel construction offers reliable performance in sensitive environments.

Designed for Versatility: 71811 ACD/P4DBC Bearing
71811 ACD/P4DBC Bearing works well in electric motors, thanks to its ability to handle combined loads. The open seal design allows for easy lubrication, extending its lifespan.

For packaging equipment, 71811 ACD/P4DBC Bearing provides the necessary precision for high-speed filling and sealing processes. Its temperature range makes it suitable for various industrial settings.

Automotive vs Aerospace: Applications of 71811 ACD/P4DBC Bearing
In automotive transmissions, 71811 ACD/P4DBC Bearing supports smooth gear shifts with its angular contact design. The phenolic cage reduces wear, even under constant use.

For aerospace actuators, 71811 ACD/P4DBC Bearing offers reliable performance in high-stress conditions. Its P4 tolerance ensures precision, which is critical for flight control systems.

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