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Super Precision Angular Contact Ball Bearings 71938 ACDGA/P4A

Super Precision Angular Contact Ball Bearings 71938 ACDGA/P4A

The 71938 ACDGA/P4A is a super precision angular contact ball bearing with a 190mm bore and 260mm outer diameter, crafted from durable chrome steel. Its 25° contact angle efficiently manages both radial and axial loads.

With a dynamic radial load capacity of 36675 lbf, it operates smoothly at speeds up to 11000 RPM. The phenolic cage ensures quiet performance and longevity, even under demanding conditions.

This open-design bearing comes pre-lubricated and works in temperatures from -30°C to 110°C. Its P4A tolerance class guarantees high precision for critical applications.

Ideal for machine tools or high-speed spindles, it can be paired in back-to-back, face-to-face, or tandem arrangements. Weighing 4.35kg, it offers robust performance in a compact package.

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Product Parameters

  • Part Number 71938 ACDGA/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 190 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 260 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 33 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 22.225 mm
  • Ball Qty 28
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Extra light / Class A
  • 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°C to 110 °C
  • Max Speed 11000 rpm
  • Weight 4.35 kg
  • Price（$） 1331.928
Super Precision Angular Contact Ball Bearings 71938 ACDGA/P4A dimension drawing
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Features

Performance Features of 71938 ACDGA/P4A Bearing

71938 ACDGA/P4A Bearing is designed with a 25° contact angle, optimising load distribution for precision applications.
Its chrome steel construction ensures durability and resistance to wear under high radial loads.

The phenolic cage maintains ball alignment, reducing friction and enhancing operational smoothness.
With a maximum speed of 11,000 rpm, it delivers reliable performance in high-speed environments.

71938 ACDGA/P4A Bearing operates efficiently within a temperature range of -30°C to 110°C.
Its extra light preload (Class A) ensures minimal resistance, ideal for precision machinery.

The open design allows for easy lubrication, extending service life and reducing maintenance needs.
Its universal matching capability supports flexible configurations like back-to-back or face-to-face arrangements.

Application

Industrial Uses of 71938 ACDGA/P4A Bearing
71938 ACDGA/P4A Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The extra light preload makes it suitable for applications demanding minimal friction and high-speed operation.

In automotive systems, 71938 ACDGA/P4A Bearing supports components like electric motors and gearboxes, providing reliable performance under radial and axial loads. Its metric sizing and universal matching options enhance compatibility with various vehicle designs.

For automation and robotics, 71938 ACDGA/P4A Bearing’s phenolic cage and chrome steel construction offer durability in mechanical arms and CNC machines. The P4A tolerance class ensures consistent precision in repetitive tasks.

Medical imaging devices benefit from 71938 ACDGA/P4A Bearing’s smooth operation and low noise levels, crucial for sensitive diagnostic equipment. The wide temperature range allows it to perform reliably in different clinical environments.

In consumer electronics, 71938 ACDGA/P4A Bearing can be found in high-end printers and scanners, where its precision enhances device longevity. The lubricated design reduces maintenance needs for everyday use.

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