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Super Precision Angular Contact Ball Bearings 71948 ACD/P4AQBCA

Super Precision Angular Contact Ball Bearings 71948 ACD/P4AQBCA

The 71948 ACD/P4AQBCA is a super precision angular contact ball bearing with a 240mm bore and 320mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 128700 lbf and operates smoothly at speeds up to 7500 RPM.

With a 25° contact angle and open design, it offers excellent performance in high-precision applications. The phenolic cage ensures quiet operation and long service life.

This bearing comes in a matched set of four, preloaded for extra light conditions, making it ideal for machine tools or spindle systems. It works well in temperatures from -30°C to 110°C.

Weighing 34kg, it’s a robust choice for heavy-duty machinery. Compliant with P4A tolerance standards, it’s interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 71948 ACD/P4AQBCA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 240 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 320 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 152 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 25.4 mm
  • Ball Qty 31
  • 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 Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 128700 lbf
  • Static Radial Load 274500 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 7500 rpm
  • Weight 34 kg
Super Precision Angular Contact Ball Bearings 71948 ACD/P4AQBCA dimension drawing
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Features

Performance Features of 71948 ACD/P4AQBCA Bearing

71948 ACD/P4AQBCA 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 128,700 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing smooth operation.
With a maximum speed of 7,500 rpm, it balances performance and reliability.

71948 ACD/P4AQBCA Bearing operates efficiently in temperatures ranging from -30°C to 110°C.
Its matched arrangement of four bearings ensures consistent performance in demanding setups.

The extra light preload (Class A) minimises vibration, making it ideal for high-precision machinery.
Open seal design allows for easy lubrication, extending maintenance intervals.

Application

Key Fields for 71948 ACD/P4AQBCA Bearing
71948 ACD/P4AQBCA Bearing is widely used in high-precision machine tools, where its 25° contact angle ensures accurate radial and axial load distribution. The matched set of four bearings provides enhanced stability for demanding applications like CNC spindles.

In aerospace components, 71948 ACD/P4AQBCA Bearing’s phenolic cage and P4A tolerance class make it suitable for gearboxes and rotor systems. Its ability to handle high speeds and loads is particularly valued in this sector.

For medical imaging devices, 71948 ACD/P4AQBCA Bearing’s chrome steel construction offers reliable performance under continuous operation. The extra light preload ensures smooth rotation, critical for precision instruments like MRI scanners.

Automotive vs Aerospace: Applications of 71948 ACD/P4AQBCA Bearing
In automotive testing rigs, 71948 ACD/P4AQBCA Bearing supports high-speed dynamometers with minimal vibration. Its metric sizing and open design simplify integration into European and Asian vehicle prototypes.

Aerospace systems benefit from 71948 ACD/P4AQBCA Bearing’s ability to withstand extreme thrust loads in turbine engines. The phenolic cage’s heat resistance makes it ideal for long-haul flight conditions.

How Does 71948 ACD/P4AQBCA Bearing Improve Performance?
71948 ACD/P4AQBCA Bearing enhances robotic arm precision in automation lines, thanks to its matched set configuration reducing play. The P4A tolerance class ensures repeatable accuracy for pick-and-place operations.

In 3D printing, 71948 ACD/P4AQBCA Bearing’s low friction maintains consistent nozzle movement during high-detail production. The lubricated design extends service intervals in continuous print farms.

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