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Super Precision Angular Contact Ball Bearings 71811 CD/P4

Super Precision Angular Contact Ball Bearings 71811 CD/P4

The 71811 CD/P4 is a super precision angular contact ball bearing with a 55mm bore and 72mm outer diameter, crafted from high-grade chrome steel. Its compact 9mm width makes it suitable for space-sensitive applications while handling radial loads up to 2272 lbf.

With a 15° contact angle and P4 tolerance class, it offers smooth operation at speeds up to 28,000 RPM. The phenolic cage ensures durability and reduces friction, ideal for high-speed performance.

This open-design bearing comes pre-lubricated for immediate use and works in temperatures from -30°C to 110°C. Its precision engineering makes it interchangeable with SKF equivalents, simplifying replacements.

Weighing just 0.081kg, it’s perfect for machine tools or spindle drives where accuracy and speed matter. The 29-ball design balances load distribution for reliable, long-lasting use.

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Product Parameters

  • Part Number 71811 CD/P4
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.007mm to 0
  • Outer Dia 72 mm
  • Outer Dia Tolerance -0.007mm to 0
  • Width 9 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 29
  • 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 2272 lbf
  • Static Radial Load 2430 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 28000 rpm
  • Weight 0.081 kg
  • Price（$） 461.88
Super Precision Angular Contact Ball Bearings 71811 CD/P4 dimension drawing
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Features

Performance Features of 71811 CD/P4 Bearing

71811 CD/P4 Bearing is crafted with a 15° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls enhance durability, supporting dynamic radial loads up to 2272 lbf.

The phenolic cage ensures smooth operation at high speeds, reaching up to 28,000 rpm.
Precision P4 tolerance guarantees consistent performance in demanding conditions.

With a compact width of 9 mm, it fits seamlessly into space-constrained designs.
Lubrication is pre-applied, reducing initial setup time and maintenance.

Application

Essential Roles of 71811 CD/P4 Bearing
In high-speed machine tools, 71811 CD/P4 Bearing excels due to its precision angular contact design, ensuring smooth rotation under radial and axial loads. The P4 tolerance class makes it ideal for applications demanding minimal vibration.

Where Is 71811 CD/P4 Bearing Used?
You’ll often find 71811 CD/P4 Bearing in spindle assemblies of CNC machines, where its 15° contact angle enhances stability. Its phenolic cage also reduces friction, extending service life in continuous operations.

Built for Heavy-Duty Use: 71811 CD/P4 Bearing
This bearing handles dynamic radial loads up to 2272 lbf, making it suitable for industrial gearboxes. The chrome steel construction ensures durability even in demanding environments.

Automotive vs Aerospace: Applications of 71811 CD/P4 Bearing
In automotive systems, 71811 CD/P4 Bearing supports high-precision components like turbochargers. For aerospace, its lightweight design and reliability are key for flight control mechanisms.

Perfect Fit for Automation: 71811 CD/P4 Bearing
Robotic arms benefit from 71811 CD/P4 Bearing’s low friction and high-speed capability. The open design allows for easy lubrication, maintaining performance in automated production lines.

Q&A

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