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Super Precision Angular Contact Ball Bearings 71821 ACDGB/P4

Super Precision Angular Contact Ball Bearings 71821 ACDGB/P4

The 71821 ACDGB/P4 is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 4860 lbf and operates smoothly at speeds up to 16,000 RPM.

With a 25° contact angle and open design, it offers excellent performance in high-speed applications. The phenolic cage ensures durability and reduces friction for smoother rotation.

This bearing comes in a matched set of two, suitable for back-to-back, face-to-face, or tandem arrangements. Ideal for precision machinery like spindles or CNC equipment where accuracy is key.

Weighing just 0.32kg, it’s lightweight yet robust, and works well in temperatures from -30°C to 110°C. Compliant with P4 tolerance class for superior precision.

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Product Parameters

  • Part Number 71821 ACDGB/P4
  • 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 13 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 Available
  • 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 4860 lbf
  • Static Radial Load 6412 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.32 kg
Super Precision Angular Contact Ball Bearings 71821 ACDGB/P4 dimension drawing
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Features

Performance Features of 71821 ACDGB/P4 Bearing

71821 ACDGB/P4 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 reduces friction and noise.

With a dynamic radial load capacity of 4860 lbf, 71821 ACDGB/P4 Bearing handles demanding conditions reliably.
The P4 tolerance class guarantees high precision, making it suitable for super precision tasks.

71821 ACDGB/P4 Bearing operates smoothly at speeds up to 16,000 rpm, balancing performance and efficiency.
Its matched arrangement options (back-to-back, face-to-face, or tandem) provide flexibility for various setups.

The open design allows for easy lubrication, ensuring consistent performance across a temperature range of -30°C to 110°C.
Weighing just 0.32 kg, it offers a lightweight yet robust solution for precision machinery.

Application

Common Applications of 71821 ACDGB/P4 Bearing
In industrial settings, 71821 ACDGB/P4 Bearing is commonly used in high-speed spindles and machine tools, where its precision and angular contact design ensure accurate performance. The open seal type allows for efficient lubrication, extending its service life in demanding conditions.

Where Is 71821 ACDGB/P4 Bearing Used?
You’ll often find 71821 ACDGB/P4 Bearing in automotive transmissions and electric motors, where its light preload and high-speed capability are ideal. The phenolic cage material reduces friction, making it a reliable choice for smooth operation.

Ideal for Precision: 71821 ACDGB/P4 Bearing
For medical imaging devices like MRI machines, 71821 ACDGB/P4 Bearing offers the stability needed for precise movements. Its chrome steel construction ensures durability, even in continuous use scenarios.

Automotive vs Aerospace: Applications of 71821 ACDGB/P4 Bearing
In automotive systems, 71821 ACDGB/P4 Bearing handles high radial loads in gearboxes, while in aerospace, its matched arrangement supports critical flight components. The P4 tolerance class guarantees consistent performance in both fields.

Practical Applications of 71821 ACDGB/P4 Bearing
Robotic arms and automation systems benefit from 71821 ACDGB/P4 Bearing’s ability to manage combined loads. Its universal matching feature simplifies installation in complex setups, saving time and effort.

Q&A

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