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Super Precision Angular Contact Ball Bearings 71921 ACDGA/P4

Super Precision Angular Contact Ball Bearings 71921 ACDGA/P4

The 71921 ACDGA/P4 is a super precision angular contact ball bearing with a 280mm bore and 380mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 12870 lbf and operates smoothly at speeds up to 7500 RPM.

With a 25° contact angle and open design, it offers excellent performance in high-precision applications. The phenolic cage ensures quiet operation and long service life.

This bearing comes in a matched set of three, suitable for back-to-back, face-to-face, or tandem arrangements. Ideal for machine tools or spindle systems where precision and reliability are key.

Weighing 0.82kg, it works in temperatures from -30°C to 110°C and is interchangeable with SKF bearings for easy replacement. Compliant with P4 tolerance class for superior accuracy.

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Product Parameters

  • Part Number 71921 ACDGA/P4
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 280 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 380 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 27
  • Contact Angle 25°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Available
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 12870 lbf
  • Static Radial Load 14738 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 7500 rpm
  • Weight 0.82 kg
Super Precision Angular Contact Ball Bearings 71921 ACDGA/P4 dimension drawing
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Features

Performance Features of 71921 ACDGA/P4 Bearing

71921 ACDGA/P4 Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls ensure high durability under dynamic radial loads up to 12870 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing operational smoothness.
With a P4 tolerance class, it delivers precision performance in high-speed applications up to 7,500 rpm.

71921 ACDGA/P4 Bearing operates efficiently in temperatures ranging from -30°C to 110°C.
Its matched arrangement options (back-to-back, face-to-face, or tandem) provide flexibility for various setups.

Application

Common Applications of 71921 ACDGA/P4 Bearing
71921 ACDGA/P4 Bearing is widely used in high-precision machine tools, where its 25° contact angle ensures accurate radial and axial load handling. The phenolic cage reduces friction, making it suitable for high-speed operations.

In robotics, 71921 ACDGA/P4 Bearing supports articulated arms, providing smooth movement and durability. Its matched arrangement allows for back-to-back or face-to-face configurations, adapting to various load requirements.

For aerospace applications, 71921 ACDGA/P4 Bearing’s P4 tolerance class guarantees reliability in critical systems. The chrome steel construction withstands extreme temperatures, ensuring consistent performance.

Where Is 71921 ACDGA/P4 Bearing Used?
You’ll often find 71921 ACDGA/P4 Bearing in CNC spindles, where its extra light preload enhances precision. The open design simplifies lubrication, extending service life in demanding environments.

In medical imaging devices, 71921 ACDGA/P4 Bearing’s low vibration characteristics improve scan accuracy. Its universal matching feature makes it versatile for different assembly needs.

Built for Heavy-Duty Use: 71921 ACDGA/P4 Bearing
71921 ACDGA/P4 Bearing excels in industrial pumps, handling both radial and thrust loads effortlessly. The 27-ball design distributes loads evenly, reducing wear over time.

For wind turbine systems, 71921 ACDGA/P4 Bearing’s phenolic cage resists moisture, ideal for outdoor applications. Its metric sizing ensures compatibility with global equipment standards.

Automotive vs Aerospace: Applications of 71921 ACDGA/P4 Bearing
In automotive transmissions, 71921 ACDGA/P4 Bearing’s high dynamic load capacity ensures smooth gear shifts. The tandem configuration option suits compact spaces.

For aircraft landing gear, 71921 ACDGA/P4 Bearing’s temperature resilience and P4 precision are crucial. Its lightweight design also helps reduce overall system weight.

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