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Super Precision Angular Contact Ball Bearings 71820 CD/P4DGB

Super Precision Angular Contact Ball Bearings 71820 CD/P4DGB

The 71820 CD/P4DGB is a super precision angular contact ball bearing with a 100mm bore and 125mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 8348 lbf and spins smoothly at speeds up to 15000 RPM, thanks to its 15° contact angle.

Its open design and phenolic cage ensure low friction and easy maintenance, while the universal matching feature allows flexible arrangements like back-to-back or face-to-face. The bearing operates reliably in temperatures from -30°C to 110°C.

With a P4 tolerance class and light preload, it offers high accuracy for demanding applications. Ideal for machine tools, spindles, or other high-precision machinery where stability and speed are key.

Weighing 0.62kg, it’s robust yet manageable for its size. This model is interchangeable with SKF bearings, making it a practical choice for replacements or upgrades.

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Product Parameters

  • Part Number 71820 CD/P4DGB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 100 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 125 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 26 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 34
  • Contact Angle 15°
  • 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 Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 8348 lbf
  • Static Radial Load 13162 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 15000 rpm
  • Weight 0.62 kg
Super Precision Angular Contact Ball Bearings 71820 CD/P4DGB dimension drawing
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Features

How Does 71820 CD/P4DGB Bearing Ensure Precision in High-Speed Applications?

71820 CD/P4DGB Bearing features a 15° contact angle, optimised for angular contact loads and high-speed performance.
Its chrome steel rings and balls provide durability, while the phenolic cage ensures smooth operation.

With a dynamic radial load capacity of 8348 lbf, it handles demanding applications with ease.
The P4 tolerance class guarantees precision, making it ideal for tasks requiring high accuracy.

Designed for universal matching, it supports back-to-back, face-to-face, or tandem arrangements.
This versatility allows for flexible installation in various configurations.

The bearing operates efficiently at speeds up to 15,000 rpm, maintaining performance in a wide temperature range.
Its lubricated design reduces friction, ensuring long-lasting reliability.

Application

Ideal for Precision: 71820 CD/P4DGB Bearing
71820 CD/P4DGB Bearing is widely used in high-precision machine tools, where its 15° contact angle ensures accurate radial and axial load distribution. The universal matching design allows flexible arrangements like back-to-back or face-to-face setups.

In robotics, 71820 CD/P4DGB Bearing enhances the smooth movement of robotic arms, thanks to its phenolic cage reducing friction. Its P4 tolerance class makes it suitable for applications demanding tight precision.

For aerospace components, 71820 CD/P4DGB Bearing’s chrome steel construction handles high-speed rotations reliably. The light preload ensures consistent performance in critical flight systems.

Automotive vs Aerospace: Applications of 71820 CD/P4DGB Bearing
In automotive systems, 71820 CD/P4DGB Bearing supports gearbox shafts, where its dynamic radial load capacity ensures durability. The metric sizing fits seamlessly into European and Asian vehicle designs.

Aerospace applications benefit from 71820 CD/P4DGB Bearing’s ability to withstand extreme speeds and temperatures. Its matched set configuration provides stability in flight control mechanisms.

Where Is 71820 CD/P4DGB Bearing Used?
You’ll find 71820 CD/P4DGB Bearing in medical imaging devices, where its precision reduces vibration for clearer scans. The open seal design allows for easy lubrication in high-use environments.

Industrial machinery like CNC spindles relies on 71820 CD/P4DGB Bearing for its consistent performance under heavy loads. The phenolic cage material minimises wear, extending service life.

Q&A

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