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Super Precision Angular Contact Ball Bearings 71904 ACD/P4ATBTD

Super Precision Angular Contact Ball Bearings 71904 ACD/P4ATBTD

The 71904 ACD/P4ATBTD is a super precision angular contact ball bearing with a 20mm bore and 37mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 2790 lbf and spins smoothly at speeds up to 100,500 RPM.

Its 25° contact angle and heavy preload (Class D) ensure stable performance under angular loads. The phenolic cage offers quiet operation and long service life, even in demanding conditions.

This set includes three matched bearings (TBT arrangement), ideal for high-precision applications like machine tool spindles or dental equipment. The open design allows easy lubrication and maintenance.

With a temperature range of -30°C to 110°C and P4A tolerance class, it delivers reliable accuracy. Weighing just 0.11kg per bearing, it’s lightweight yet robust for its size.

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Product Parameters

  • Part Number 71904 ACD/P4ATBTD
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 20 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 37 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 27 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 15
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 3 bearings <>> TBT
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing No
  • Preload Heavy / Class D
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 2790 lbf
  • Static Radial Load 2059 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 100500 rpm
  • Weight 0.11 kg
Super Precision Angular Contact Ball Bearings 71904 ACD/P4ATBTD dimension drawing
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Features

Performance Features of 71904 ACD/P4ATBTD Bearing

71904 ACD/P4ATBTD Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.

The chrome steel rings and balls enhance durability, supporting dynamic radial loads up to 2790 lbf.

With a phenolic cage, it ensures smooth operation at high speeds, reaching up to 100,500 rpm.

Its matched arrangement of three bearings provides stability, making it suitable for precision tasks.

Application

Industrial Uses of 71904 ACD/P4ATBTD Bearing
71904 ACD/P4ATBTD Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The heavy preload and P4A tolerance class make it suitable for applications demanding minimal deflection.

In robotics, 71904 ACD/P4ATBTD Bearing supports articulated arms, providing smooth motion and long service life. The phenolic cage reduces friction, enhancing efficiency in repetitive movements.

For aerospace components, 71904 ACD/P4ATBTD Bearing handles both radial and axial loads in compact spaces. Its high-speed capability and temperature stability make it reliable in demanding flight conditions.

Where Is 71904 ACD/P4ATBTD Bearing Used?
You’ll find 71904 ACD/P4ATBTD Bearing in dental drills, where precision and speed are critical. The chrome steel construction ensures durability even with frequent sterilization.

In 3D printers, 71904 ACD/P4ATBTD Bearing helps maintain print head accuracy during high-speed operations. The matched set arrangement reduces vibration for better print quality.

Built for Heavy-Duty Use: 71904 ACD/P4ATBTD Bearing
71904 ACD/P4ATBTD Bearing excels in industrial pumps, handling both radial and thrust loads effortlessly. The lubricated design ensures consistent performance in continuous operation.

For electric motors, 71904 ACD/P4ATBTD Bearing provides reliable support in high-RPM applications. Its temperature range makes it adaptable to various operating environments.

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