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Super Precision Angular Contact Ball Bearings 71821 ACD/P4DGC

Super Precision Angular Contact Ball Bearings 71821 ACD/P4DGC

The 71821 ACD/P4DGC is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. Its 25° contact angle and moderate preload ensure smooth handling of radial and axial loads.

With a dynamic radial load capacity of 7898 lbf and a max speed of 16000 RPM, it performs reliably in high-speed applications. The open design and phenolic cage allow for easy lubrication and long service life.

This bearing comes in a matched set of two, suitable for universal mounting configurations like back-to-back or face-to-face. Ideal for precision machinery, spindles, or high-performance equipment where accuracy is key.

Weighing 0.64kg, it operates efficiently in temperatures from -30°C to 110°C, meeting P4 tolerance standards for exceptional performance.

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Product Parameters

  • Part Number 71821 ACD/P4DGC
  • 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 Moderate / Class C
  • 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/P4DGC dimension drawing
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Features

Performance Features of 71821 ACD/P4DGC Bearing

71821 ACD/P4DGC Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.

Its chrome steel rings and balls provide strong resistance to both dynamic and static radial loads, reaching up to 7898 lbf and 12825 lbf respectively.

The phenolic cage ensures smooth operation at high speeds, with a maximum rating of 16,000 rpm.

Universal matching allows flexible arrangement in back-to-back, face-to-face, or tandem configurations for varied precision needs.

Application

Industrial Uses of 71821 ACD/P4DGC Bearing
This bearing is commonly used in high-precision machine tools, where its moderate preload and universal matching ensure smooth operation. The 25° contact angle makes it suitable for handling combined radial and axial loads efficiently.

Where Is 71821 ACD/P4DGC Bearing Used?
You’ll often find it in automotive applications like high-performance gearboxes, where its P4 tolerance class guarantees accuracy. The chrome steel construction also provides durability under demanding conditions.

Built for Heavy-Duty Use: 71821 ACD/P4DGC Bearing
It’s a reliable choice for industrial robots, particularly in joints requiring precise movement. The phenolic cage reduces friction, enhancing performance in high-speed scenarios.

Automotive vs Aerospace: Applications of 71821 ACD/P4DGC Bearing
In automotive systems, it supports gear shafts, while in aerospace, it’s used in actuator mechanisms. The universal matching feature allows flexible installation in various configurations.

Perfect Fit for Automation: 71821 ACD/P4DGC Bearing
This bearing excels in automated production lines, especially in spindle units. Its lubricated design ensures long service life even in continuous operation.

Q&A

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