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Super Precision Angular Contact Ball Bearings 71821 CDGB/P4

Super Precision Angular Contact Ball Bearings 71821 CDGB/P4

The 71821 CDGB/P4 is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. Its compact 13mm width makes it suitable for tight spaces while maintaining high performance.

With a 15° contact angle, it handles both radial and axial loads efficiently, supporting up to 5152 lbf dynamically. It spins smoothly at speeds up to 16,000 RPM, ideal for high-speed applications.

The open design allows easy lubrication, and the phenolic cage ensures quiet operation. It operates well in temperatures from -30°C to 110°C, offering reliable performance in various conditions.

This bearing is interchangeable with SKF models and comes in a set of three for universal matching. Perfect for precision machinery like spindles or CNC equipment where accuracy is key. Weighing just 0.32kg, it balances lightweight design with robust durability.

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Product Parameters

  • Part Number 71821 CDGB/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 15°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 3
  • 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 5152 lbf
  • Static Radial Load 6750 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 CDGB/P4 dimension drawing
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Features

Performance Features of 71821 CDGB/P4 Bearing

71821 CDGB/P4 Bearing is designed with a 15° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls ensure durability and smooth operation under high-speed conditions.

The phenolic cage in 71821 CDGB/P4 Bearing maintains ball alignment, reducing friction and wear.
With a maximum speed of 16,000 rpm, it delivers reliable performance in precision tasks.

71821 CDGB/P4 Bearing operates efficiently within a temperature range of -30°C to 110°C.
Its light preload design enhances stability, making it suitable for high-precision applications.

The dynamic radial load capacity of 5152 lbf ensures 71821 CDGB/P4 Bearing handles demanding conditions.
Its open design allows for easy lubrication, maintaining optimal performance over time.

Application

Industrial Uses of 71821 CDGB/P4 Bearing
This bearing is commonly used in high-speed machine tools, where its precision angular contact design ensures accurate performance. The open seal type allows for efficient lubrication, extending service life in demanding conditions.

Where Is 71821 CDGB/P4 Bearing Used?
You’ll often find it in automotive transmissions, supporting smooth operation under angular loads. Its light preload makes it suitable for applications requiring minimal friction and high rotational accuracy.

Built for Heavy-Duty Use: 71821 CDGB/P4 Bearing
The chrome steel construction handles dynamic radial loads well, making it reliable for industrial pumps and compressors. Its phenolic cage adds durability while reducing weight.

Automotive vs Aerospace: Applications of 71821 CDGB/P4 Bearing
In cars, it’s ideal for wheel hubs and gear systems, while aerospace applications benefit from its high-speed capabilities. The P4 tolerance class ensures consistent performance in both fields.

Perfect Fit for Automation: 71821 CDGB/P4 Bearing
Robotic arms and CNC machines use this bearing for its precise movement and low maintenance needs. The 15° contact angle provides stability during high-speed operations.

Q&A

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