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Super Precision Angular Contact Ball Bearings 71811 ACD/P4QBCB

Super Precision Angular Contact Ball Bearings 71811 ACD/P4QBCB

The 71811 ACD/P4QBCB is a super precision angular contact ball bearing with a 55mm bore and 72mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 5738 lbf and operates smoothly at high speeds of 34,000 RPM.

Its 25° contact angle and matched set of four bearings provide excellent stability for angular loads. The phenolic cage ensures quiet operation and long service life.

This bearing is preloaded for light applications, making it ideal for precision machinery like spindles or CNC tools. It performs reliably in temperatures from -30°C to 110°C.

Weighing 0.32kg, it’s a robust yet compact choice for high-speed applications. Compliant with P4 tolerance standards, it’s interchangeable with SKF bearings for easy replacements.

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Product Parameters

  • Part Number 71811 ACD/P4QBCB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 72 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 36 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 29
  • Contact Angle 25°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 4 bearings <<>> QBC
  • Number Of Bearings In Matched Set 4
  • Universal Matching Bearing No
  • Preload Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 5738 lbf
  • Static Radial Load 9112 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.32 kg
Super Precision Angular Contact Ball Bearings 71811 ACD/P4QBCB dimension drawing
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Features

Engineered for Precision: 71811 ACD/P4QBCB Bearing

71811 ACD/P4QBCB Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
Its chrome steel rings and balls ensure durability and smooth operation under dynamic radial loads up to 5738 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance at speeds up to 34,000 rpm.
With a matched arrangement of four bearings, it offers consistent load distribution and reliability.

71811 ACD/P4QBCB Bearing operates efficiently in temperatures ranging from -30°C to 110°C.
Its P4 tolerance class guarantees precision, making it suitable for demanding industrial uses.

Application

Industrial Uses of 71811 ACD/P4QBCB Bearing
71811 ACD/P4QBCB Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of four bearings provides excellent stability for heavy cutting operations.

In automotive applications, 71811 ACD/P4QBCB Bearing supports high-speed components like turbochargers and electric motors. Its light preload and phenolic cage reduce friction, enhancing efficiency and longevity.

For medical imaging devices, 71811 ACD/P4QBCB Bearing’s P4 tolerance class delivers the precision needed for smooth, quiet operation. The chrome steel construction also ensures reliability in demanding clinical environments.

Automation systems benefit from 71811 ACD/P4QBCB Bearing’s ability to handle combined loads in robotic arms. The lubricated design minimises maintenance, making it ideal for continuous operation.

In consumer electronics, 71811 ACD/P4QBCB Bearing is found in high-performance printers and scanners. Its compact size and high-speed capability make it a reliable choice for precision movement.

Q&A

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