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Super Precision Angular Contact Ball Bearings S71928 ACD/P4A

Super Precision Angular Contact Ball Bearings S71928 ACD/P4A

The S71928 ACD/P4A is a super precision angular contact ball bearing with a 140mm bore and 190mm outer diameter, crafted from high-quality chrome steel. Its 25° contact angle efficiently handles combined radial and axial loads, making it versatile for demanding applications.

This sealed bearing comes pre-lubricated and can operate at speeds up to 6000 RPM, with a temperature range of -30°C to 110°C. Its phenolic cage ensures smooth performance under high dynamic radial loads of 20340 lbf.

Designed for precision, it meets P4 (ABEC-7) tolerance standards, ensuring minimal vibration and noise. The 29 balls, each 15.875mm in diameter, contribute to its stability and load distribution.

Weighing 1.69kg, it’s robust yet manageable for its size. Ideal for high-precision machinery like spindles or CNC equipment where accuracy and reliability are crucial. Compatible with SKF bearings for easy replacement.

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Product Parameters

  • Part Number S71928 ACD/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 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 20340 lbf
  • Static Radial Load 24750 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 6000 rpm
  • Weight 1.69 kg
  • Price（$） 222.462
Super Precision Angular Contact Ball Bearings S71928 ACD/P4A dimension drawing
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Features

Performance Features of S71928 ACD/P4A Bearing

S71928 ACD/P4A Bearing is designed with a 25° contact angle, optimising load distribution for precision applications.
Its chrome steel rings and balls ensure durability under high dynamic radial loads of up to 20340 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing operational smoothness.
With a maximum speed of 6,000 rpm, it balances performance and longevity in demanding conditions.

S71928 ACD/P4A Bearing operates efficiently within a temperature range of -30° to 110°C.
Its sealed design and lubrication help maintain performance while reducing maintenance needs.

The P4 tolerance class ensures high precision, making it suitable for critical applications.
Its robust construction and material choice contribute to a longer service life.

Application

Key Fields for S71928 ACD/P4A Bearing
S71928 ACD/P4A Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction helps maintain performance in environments with dust or debris.

How Does S71928 ACD/P4A Bearing Improve Performance?
In CNC machining centres, S71928 ACD/P4A Bearing reduces vibration, leading to smoother cuts and better surface finishes. Its phenolic cage offers good heat resistance, making it suitable for prolonged high-speed operation.

Built for Heavy-Duty Use: S71928 ACD/P4A Bearing
S71928 ACD/P4A Bearing handles heavy radial loads in industrial gearboxes, thanks to its chrome steel rings and 25° contact angle. The P4 tolerance class ensures consistent performance under demanding conditions.

Automotive vs Aerospace: Applications of S71928 ACD/P4A Bearing
In automotive turbochargers, S71928 ACD/P4A Bearing supports high-speed shafts, while in aerospace systems, its precision helps maintain alignment in critical components. The lubricated design extends service life in both applications.

Perfect Fit for Automation: S71928 ACD/P4A Bearing
S71928 ACD/P4A Bearing is ideal for robotic arms, where its low friction and high rigidity enhance movement accuracy. The 140 mm bore size accommodates larger shafts commonly found in industrial automation setups.

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