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Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBC

Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBC

The 71948 ACD/P4ADBC is a super precision angular contact ball bearing with a 240mm bore and 320mm outer diameter, crafted from durable chrome steel. Its 25° contact angle and matched pair arrangement (DB) provide stability under angular loads.

This bearing handles dynamic radial loads up to 78975 lbf and operates smoothly at speeds up to 7500 RPM. The phenolic cage ensures quiet performance, while the moderate preload (Class C) offers balanced rigidity.

Its open design allows easy lubrication, and it works reliably in temperatures from -30°C to 110°C. The P4A tolerance class guarantees high precision for demanding applications.

Weighing 17kg, this bearing is ideal for machine tools or high-precision spindles where accuracy is crucial. It’s interchangeable with SKF bearings, making replacements straightforward. The set includes two matched bearings for paired use.

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Product Parameters

  • Part Number 71948 ACD/P4ADBC
  • 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 76 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 2 bearings <> DB
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing No
  • Preload Moderate / Class C
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 78975 lbf
  • Static Radial Load 137250 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 7500 rpm
  • Weight 17 kg
Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBC dimension drawing
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Features

Performance Features of 71948 ACD/P4ADBC Bearing

71948 ACD/P4ADBC 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 up to 78,975 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing operational smoothness.
With a maximum speed of 7,500 rpm, it balances performance and reliability in demanding conditions.

71948 ACD/P4ADBC Bearing operates efficiently in temperatures ranging from -30°C to 110°C.
Its matched arrangement of two bearings provides stability, making it suitable for angular contact tasks.

Application

Super Precision Angular Contact Ball Bearings 71948 ACD/P4ADBC are commonly used in high-precision machine tools, where their 25° contact angle ensures accurate radial and axial load handling. The matched arrangement of two bearings provides stability in demanding operations.

In aerospace applications, 71948 ACD/P4ADBC Bearings support components like turbine shafts, thanks to their moderate preload and phenolic cage for reduced friction. Their P4A tolerance class makes them suitable for critical systems requiring tight precision.

For robotics, these bearings are ideal for articulated arms, where smooth angular movement is essential. The chrome steel construction ensures durability, even in high-speed scenarios.

Medical imaging devices also benefit from 71948 ACD/P4ADBC Bearings, as their low vibration and high load capacity enhance performance in sensitive equipment. The open design allows for easy lubrication maintenance.

In industrial automation, these bearings are often found in CNC machinery, where their matched set configuration improves alignment and reduces wear over time. The metric sizing ensures compatibility with a wide range of equipment.

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