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Super Precision Angular Contact Ball Bearings 71821 ACD/P4DGB

Super Precision Angular Contact Ball Bearings 71821 ACD/P4DGB

The 71821 ACD/P4DGB is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 7898 lbf and operates smoothly at speeds up to 16,000 RPM.

With a 25° contact angle and universal matching design, it offers flexibility for back-to-back, face-to-face, or tandem arrangements. The phenolic cage ensures quiet and efficient performance.

Ideal for high-precision applications like machine tools or spindles, this bearing works in temperatures from -30°C to 110°C. Its light preload (Class B) ensures smooth operation under angular loads.

Weighing 0.64kg, it comes as a matched set of two bearings, interchangeable with SKF models. The open design allows easy lubrication for long-lasting use.

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Product Parameters

  • Part Number 71821 ACD/P4DGB
  • 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 Universal matching
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Light / Class B
  • 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/P4DGB dimension drawing
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Features

Performance Features of 71821 ACD/P4DGB Bearing

71821 ACD/P4DGB Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel construction ensures durability and resistance to wear under dynamic radial loads up to 7898 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance at high speeds up to 16,000 rpm.
Universal matching allows flexible arrangement options, including back-to-back, face-to-face, or tandem configurations.

With a precision tolerance class of P4, 71821 ACD/P4DGB Bearing delivers reliable operation in temperatures from -30°C to 110°C.
Its lubricated design minimises maintenance needs while ensuring smooth and efficient performance.

Application

Key Fields for 71821 ACD/P4DGB Bearing
71821 ACD/P4DGB Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The light preload and P4 tolerance class make it suitable for applications demanding minimal vibration.

In robotics, 71821 ACD/P4DGB Bearing supports articulated arms, providing smooth movement and long service life. The universal matching feature allows flexible arrangement in complex assemblies.

For medical imaging devices, 71821 ACD/P4DGB Bearing’s phenolic cage reduces friction, ensuring quiet operation. Its chrome steel construction maintains reliability in sterile environments.

Automotive testing equipment benefits from 71821 ACD/P4DGB Bearing’s high-speed capability, handling radial and axial loads simultaneously. The metric dimensions ensure compatibility with European-designed systems.

In aerospace applications, 71821 ACD/P4DGB Bearing’s temperature stability performs well in avionics systems. The matched set configuration simplifies installation in tight spaces.

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