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Super Precision Angular Contact Ball Bearings 71920 CD/P4A

Super Precision Angular Contact Ball Bearings 71920 CD/P4A

The 71920 CD/P4A is a super precision angular contact ball bearing with a 100mm bore and 140mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 13612 lbf and operates smoothly at speeds up to 14000 RPM.

Its 15° contact angle and phenolic cage ensure stable performance under angular loads, while the open design allows for easy lubrication. The bearing works reliably in temperatures ranging from -30°C to 110°C.

This model meets the P4 tolerance class (ABEC-7) for exceptional precision, making it suitable for high-accuracy applications like machine tool spindles or precision instruments. Weighing 0.8kg, it offers a robust yet lightweight solution.

Interchangeable with SKF bearings, it’s a practical choice for replacements or upgrades in demanding industrial settings.

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Product Parameters

  • Part Number 71920 CD/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 100 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 140 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 26
  • Contact Angle 15°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 13612 lbf
  • Static Radial Load 14738 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 14000 rpm
  • Weight 0.8 kg
  • Price（$） 261.36
Super Precision Angular Contact Ball Bearings 71920 CD/P4A dimension drawing
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Features

How Does 71920 CD/P4A Bearing Ensure Precision in High-Speed Applications?

71920 CD/P4A Bearing features a 15° contact angle, optimised for high-speed angular contact applications.
Its chrome steel construction and phenolic cage enhance durability while maintaining smooth operation.

With a dynamic radial load capacity of 13612 lbf, it handles demanding conditions reliably.
The P4 tolerance class ensures consistent precision, making it suitable for critical tasks.

71920 CD/P4A Bearing operates efficiently at speeds up to 14,000 rpm.
Its open design simplifies lubrication, reducing maintenance requirements.

Application

Common Applications of 71920 CD/P4A Bearing
71920 CD/P4A Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The open seal type allows for efficient lubrication, extending service life in demanding conditions.
In robotics, 71920 CD/P4A Bearing supports articulated arms, providing smooth movement with minimal friction. Its phenolic cage material reduces weight while maintaining strength, ideal for repetitive motions.
For aerospace applications, 71920 CD/P4A Bearing handles radial and axial loads in avionics systems. The P4 tolerance class guarantees consistent performance even under extreme temperature variations.

Where Is 71920 CD/P4A Bearing Used?
You’ll often find 71920 CD/P4A Bearing in CNC machining centres, where its 15° contact angle enhances precision cutting. The chrome steel construction resists wear, even during prolonged high-speed operation.
Medical imaging devices also rely on 71920 CD/P4A Bearing for smooth, vibration-free rotation. Its low-noise performance is crucial for maintaining clear diagnostic results in sensitive equipment.

Optimized for Performance: 71920 CD/P4A Bearing
71920 CD/P4A Bearing excels in electric vehicle motors, managing combined loads with efficiency. The lubricated design ensures quiet operation, perfect for reducing cabin noise.
In packaging machinery, 71920 CD/P4A Bearing maintains consistent speeds for conveyor systems. The 26-ball arrangement distributes loads evenly, preventing premature wear during continuous use.

Automotive vs Aerospace: Applications of 71920 CD/P4A Bearing
For automotive transmissions, 71920 CD/P4A Bearing handles high rotational speeds with stability. Its metric sizing makes it compatible with European and Asian engine designs.
In aerospace hydraulics, 71920 CD/P4A Bearing withstands variable pressures while maintaining precision. The temperature range of -30° to 110°C ensures reliability across flight conditions.

Q&A

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