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Super Precision Angular Contact Ball Bearings S71928 CD/P4A

Super Precision Angular Contact Ball Bearings S71928 CD/P4A

The S71928 CD/P4A is a super precision angular contact ball bearing with a 140mm bore and 190mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 21510 lbf and operates smoothly at speeds up to 6700 RPM.

Its sealed design keeps lubrication intact, while the phenolic cage ensures quiet and efficient performance. The bearing works reliably in temperatures ranging from -30°C to 110°C.

With a 15° contact angle and P4 tolerance class, it offers excellent precision for demanding applications. Ideal for high-speed machinery, spindles, or other equipment requiring accurate angular contact.

Weighing 1.69kg, it’s robust yet manageable for its size. Compliant with universal standards, it’s interchangeable with SKF bearings for easy replacements.

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Product Parameters

  • Part Number S71928 CD/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 140 mm
  • Bore Dia Tolerance -0.01mm to 0
  • Outer Dia 190 mm
  • Outer Dia Tolerance -0.011mm to 0
  • Width 24 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 15.875 mm
  • Ball Qty 29
  • Contact Angle 15°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement Available
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 21510 lbf
  • Static Radial Load 26100 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 6700 rpm
  • Weight 1.69 kg
  • Price（$） 2221.65
Super Precision Angular Contact Ball Bearings S71928 CD/P4A dimension drawing
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Features

Why Choose S71928 CD/P4A Bearing for Precision Tasks?

S71928 CD/P4A Bearing features a 15° contact angle, ideal for handling combined radial and axial loads with high precision.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction for smoother operation.

With a dynamic radial load capacity of 21510 lbf, it performs reliably in demanding applications.
The P4 tolerance class guarantees exceptional accuracy, making it suitable for high-precision machinery.

Sealed and preloaded options enhance performance, reducing the need for frequent maintenance.
Its maximum speed of 6,700 rpm ensures efficiency without compromising precision.

Application

Key Fields for S71928 CD/P4A Bearing
S71928 CD/P4A Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction keeps contaminants out, extending service life in demanding industrial environments.

In robotics, S71928 CD/P4A Bearing provides smooth motion control for articulated arms, thanks to its phenolic cage reducing friction. Its 15° contact angle offers excellent load distribution during dynamic movements.

For medical imaging devices like MRI scanners, S71928 CD/P4A Bearing’s P4 tolerance guarantees vibration-free operation. The chrome steel components withstand continuous use while maintaining precision.

Automotive testing equipment often incorporates S71928 CD/P4A Bearing for its ability to handle combined radial and axial loads. The lubricated design ensures consistent performance during prolonged high-speed runs.

In aerospace applications, S71928 CD/P4A Bearing’s matched arrangement provides stability for flight control systems. Its temperature resilience makes it suitable for both cockpit instruments and engine-adjacent components.

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