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Super Precision Angular Contact Ball Bearings 71911 ACD/P4ADBA

Super Precision Angular Contact Ball Bearings 71911 ACD/P4ADBA

The 71911 ACD/P4ADBA is a super precision angular contact ball bearing with a 55mm bore and 80mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 6660 lbf and operates smoothly at speeds up to 34,000 RPM.

Its 25° contact angle and matched arrangement of two bearings (DB) provide excellent stability for angular loads. The phenolic cage ensures quiet operation and durability under high-speed conditions.

This bearing is preloaded for extra light performance, making it ideal for precision applications like machine tool spindles or high-speed motors. It works reliably in temperatures from -30°C to 110°C.

Weighing just 0.36kg, it’s lightweight yet robust. Compliant with P4A tolerance standards, it’s interchangeable with SKF bearings for easy replacements. A great choice for demanding industrial uses.

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Product Parameters

  • Part Number 71911 ACD/P4ADBA
  • 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 Extra light / Class A
  • 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/P4ADBA dimension drawing
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Features

How Does 71911 ACD/P4ADBA Bearing Ensure Precision in High-Speed Applications?

71911 ACD/P4ADBA Bearing features a 25° contact angle, optimised for angular contact loads and high-speed performance.
The chrome steel rings and balls provide durability, while the phenolic cage reduces friction and noise.

With a dynamic radial load capacity of 6660 lbf, it handles demanding applications with ease.
Its maximum speed of 34,000 rpm makes it suitable for precision machinery requiring smooth operation.

The extra-light preload (Class A) ensures minimal deflection, enhancing accuracy.
Its matched arrangement (DB) of two bearings improves stability and load distribution.

The P4A tolerance class guarantees tight dimensional control for consistent performance.
Lubricated for reduced wear, it operates efficiently within a temperature range of -30°C to 110°C.

Application

Where Is 71911 ACD/P4ADBA Bearing Used?
71911 ACD/P4ADBA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of two bearings provides stability in demanding industrial settings.

In automotive applications, 71911 ACD/P4ADBA Bearing supports high-speed components like turbochargers and gearbox systems. Its extra light preload helps reduce friction, improving overall efficiency.

For medical imaging devices, 71911 ACD/P4ADBA Bearing’s phenolic cage and chrome steel construction offer reliable performance. The P4A tolerance class ensures smooth operation in sensitive equipment.

Automation systems benefit from 71911 ACD/P4ADBA Bearing’s ability to handle both radial and axial loads. Its high-speed capability makes it suitable for robotic arms and CNC machinery.

In consumer electronics, 71911 ACD/P4ADBA Bearing can be found in precision devices like 3D printers. The lubricated design ensures quiet operation and long service life.

Q&A

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