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Super Precision Angular Contact Ball Bearings 71821 ACDGC/P4

Super Precision Angular Contact Ball Bearings 71821 ACDGC/P4

The 71821 ACDGC/P4 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 4860 lbf and operates smoothly at speeds up to 16,000 RPM.

Its 25° contact angle and moderate preload (Class C) ensure stable performance under angular loads. The open design and phenolic cage make it lightweight yet robust, suitable for high-speed applications.

This bearing is ideal for precision machinery like spindles or CNC tools, where accuracy and speed are crucial. It works in temperatures from -30°C to 110°C and comes lubricated for immediate use.

Weighing just 0.32kg, it’s part of a universal matching set, allowing flexible arrangements (back-to-back, face-to-face, or tandem). Compliant with P4 tolerance standards for reliable performance.

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Product Parameters

  • Part Number 71821 ACDGC/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 No
  • 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 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 ACDGC/P4 dimension drawing
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Features

Engineered for Precision: 71821 ACDGC/P4 Bearing

71821 ACDGC/P4 Bearing features 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, it handles demanding conditions reliably.

The P4 tolerance class guarantees high precision, making it suitable for critical tasks.

Application

Industrial Uses of 71821 ACDGC/P4 Bearing
71821 ACDGC/P4 Bearing is commonly used in high-precision machine tools, where its moderate preload and 25° contact angle ensure accurate spindle rotation. The open design and phenolic cage make it suitable for environments requiring minimal friction and heat buildup.

Where Is 71821 ACDGC/P4 Bearing Used?
In automotive applications, 71821 ACDGC/P4 Bearing supports high-speed components like turbochargers and transmission systems. Its P4 tolerance class and chrome steel construction provide the durability needed for demanding conditions.

Built for Heavy-Duty Use: 71821 ACDGC/P4 Bearing
71821 ACDGC/P4 Bearing excels in robotics and automation, particularly in robotic arms and CNC machines. The tandem arrangement option allows for versatile load distribution, enhancing performance in complex setups.

Medical vs Industrial: Where 71821 ACDGC/P4 Bearing Excels
For medical imaging devices, 71821 ACDGC/P4 Bearing offers reliable precision with its P4 tolerance and lubricated design. In industrial settings, it handles radial loads efficiently, making it a go-to for pumps and compressors.

Q&A

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