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Super Precision Angular Contact Ball Bearings 71821 ACD/P4DBA

Super Precision Angular Contact Ball Bearings 71821 ACD/P4DBA

The 71821 ACD/P4DBA is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. It features a 25° contact angle and comes in a matched pair for balanced performance.

Designed for angular contact loads, it handles up to 7898 lbf dynamically and spins smoothly at speeds up to 16000 RPM. The phenolic cage ensures quiet operation and longevity, even under demanding conditions.

Its open design allows easy lubrication, while the P4 tolerance class guarantees high precision. Ideal for applications like machine tool spindles or high-speed rotary systems where accuracy is key.

Weighing 0.64kg, this bearing operates reliably in temperatures from -30°C to 110°C. It’s interchangeable with SKF bearings, making it a practical choice for replacements or upgrades.

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Product Parameters

  • Part Number 71821 ACD/P4DBA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 130 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 26 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 35
  • 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 Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 7898 lbf
  • Static Radial Load 12825 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.64 kg
Super Precision Angular Contact Ball Bearings 71821 ACD/P4DBA dimension drawing
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Features

How Is 71821 ACD/P4DBA Bearing Engineered for Reliability?

71821 ACD/P4DBA Bearing features a 25° contact angle, optimised for handling combined radial and axial loads.
The chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and wear.

With a dynamic radial load capacity of 7898 lbf, it delivers consistent performance in precision applications.
Its extra-light preload (Class A) enhances smooth operation, making it suitable for high-speed use.

The open design allows for easy lubrication, maintaining efficiency even at speeds up to 16,000 rpm.
Its P4 tolerance class ensures high precision, ideal for demanding industrial or machinery applications.

Application

Industrial Uses of 71821 ACD/P4DBA Bearing
The 71821 ACD/P4DBA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. Its extra light preload makes it ideal for applications requiring minimal friction and smooth operation.

In automotive systems, 71821 ACD/P4DBA Bearing supports components like wheel hubs and transmissions, where its durability and precision are key. The matched arrangement of two bearings enhances stability under heavy loads.

For medical imaging devices, 71821 ACD/P4DBA Bearing’s phenolic cage and chrome steel construction provide reliable performance in high-speed scenarios. Its P4 tolerance class ensures consistent accuracy in critical applications.

Automation and robotics benefit from 71821 ACD/P4DBA Bearing’s ability to handle combined loads in robotic arms and CNC machines. The open design allows for easy lubrication, extending service life in demanding environments.

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