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Super Precision Angular Contact Ball Bearings 71938 ACD/P4A

Super Precision Angular Contact Ball Bearings 71938 ACD/P4A

The 71938 ACD/P4A is a super precision angular contact ball bearing with a 190mm bore and 260mm outer diameter, crafted from high-quality chrome steel. It handles radial loads up to 36675 lbf and operates smoothly at speeds up to 6700 RPM.

Its 25° contact angle and phenolic cage ensure stable performance under angular loads, while the open design allows for easy lubrication. The bearing is preloaded for enhanced accuracy and fits well in high-precision applications.

With a P4 tolerance class (ABEC-7), it’s ideal for machine tools or spindle systems where precision is key. The bearing works reliably in temperatures from -30°C to 110°C.

Weighing 4.35kg, it’s robust yet manageable for its size. Compatible with SKF bearings, making it a practical choice for replacements or upgrades.

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Product Parameters

  • Part Number 71938 ACD/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 190 mm
  • Bore Dia Tolerance -0.012mm to 0
  • Outer Dia 260 mm
  • Outer Dia Tolerance -0.013mm to 0
  • Width 33 mm
  • Width Tolerance -0.24mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 28
  • Contact Angle 25°
  • 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 36675 lbf
  • Static Radial Load 46800 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 6700 rpm
  • Weight 4.35 kg
  • Price（$） 3721.734
Super Precision Angular Contact Ball Bearings 71938 ACD/P4A dimension drawing
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Features

Performance Features of 71938 ACD/P4A Bearing

71938 ACD/P4A Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls enhance durability, supporting dynamic radial loads up to 36675 lbf.

The phenolic cage ensures smooth operation, reducing friction and noise during high-speed rotation.
With a maximum speed of 6,700 rpm, it balances precision and performance in demanding conditions.

71938 ACD/P4A Bearing operates efficiently within a temperature range of -30° to 110°C.
Its P4 tolerance class guarantees high precision, making it suitable for critical applications.

Application

Industrial Uses of 71938 ACD/P4A Bearing
71938 ACD/P4A Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The phenolic cage reduces friction, making it suitable for continuous operation in demanding environments.

In automotive applications, 71938 ACD/P4A Bearing supports high-speed components like turbochargers and electric motors. Its P4 tolerance class guarantees consistent performance under varying loads and speeds.

For robotics, 71938 ACD/P4A Bearing provides reliable motion control in articulated arms and CNC machinery. The chrome steel construction offers durability, while the open design allows for easy lubrication.

Medical imaging devices benefit from 71938 ACD/P4A Bearing’s precision and low vibration. Its 25° contact angle ensures smooth rotation in sensitive equipment like MRI scanners.

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