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Super Precision Angular Contact Ball Bearings 71911 ACD/HCP4AQBCB

Super Precision Angular Contact Ball Bearings 71911 ACD/HCP4AQBCB

The 71911 ACD/HCP4AQBCB is a super precision angular contact ball bearing with a 55mm bore and 80mm outer diameter, crafted from high-quality chrome steel. It features a 25° contact angle and comes in a matched set of four bearings for balanced performance.

This bearing handles radial loads up to 10980 lbf and reaches speeds of 34000 RPM, thanks to its ceramic balls and phenolic cage. Its open design allows for easy lubrication, ensuring smooth operation in temperatures from -30°C to 110°C.

The light preload (Class B) and P4A tolerance class make it ideal for high-precision applications. Its matched arrangement (QBC) ensures consistent performance across all four bearings.

Perfect for machine tools or high-speed spindles where accuracy and reliability are crucial. Weighing 0.61kg, it offers a robust yet lightweight solution for demanding industrial environments.

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Product Parameters

  • Part Number 71911 ACD/HCP4AQBCB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 80 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 52 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 23
  • Contact Angle 25°
  • Tolerance Class P4A
  • 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 Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 10980 lbf
  • Static Radial Load 12375 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.61 kg
Super Precision Angular Contact Ball Bearings 71911 ACD/HCP4AQBCB dimension drawing
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Features

Performance Features of 71911 ACD/HCP4AQBCB Bearing

71911 ACD/HCP4AQBCB Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and ceramic balls enhance durability while reducing friction.

The phenolic cage maintains ball alignment, ensuring smooth operation even at high speeds.
With a maximum speed of 34,000 rpm, it delivers reliable performance in precision tasks.

71911 ACD/HCP4AQBCB Bearing’s light preload and P4A tolerance class ensure consistent accuracy.
Its matched arrangement of four bearings provides stability for demanding applications.

The dynamic radial load capacity of 10,980 lbf makes it suitable for heavy-duty use.
Operating between -30°C to 110°C, it maintains performance in varied temperature conditions.

Application

Key Fields for 71911 ACD/HCP4AQBCB Bearing
71911 ACD/HCP4AQBCB Bearing is widely used in high-speed machine tools, where its ceramic balls and phenolic cage reduce friction and heat buildup. The 25° contact angle ensures stable performance under angular loads, making it ideal for precision spindle applications.

In robotics, 71911 ACD/HCP4AQBCB Bearing supports articulated arms that require smooth, accurate movement. Its matched set of four bearings provides balanced load distribution, crucial for repetitive tasks in automated systems.

For medical imaging devices, 71911 ACD/HCP4AQBCB Bearing’s P4A tolerance class guarantees the precision needed for clear, consistent results. The chrome steel rings and ceramic balls also minimise wear, extending the bearing’s lifespan in demanding environments.

In aerospace components, 71911 ACD/HCP4AQBCB Bearing handles both radial and thrust loads efficiently. Its lightweight phenolic cage and high-speed capability make it a reliable choice for aircraft instrumentation and control systems.

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