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Super Precision Angular Contact Ball Bearings 71904 ACE/P4A

Super Precision Angular Contact Ball Bearings 71904 ACE/P4A

The 71904 ACE/P4A is a super precision angular contact ball bearing with a 20mm bore and 37mm outer diameter, crafted from high-quality chrome steel. Its compact 9mm width makes it suitable for tight spaces, while the 25° contact angle efficiently handles combined loads.

This bearing spins smoothly at speeds up to 78,000 RPM and can manage dynamic radial loads of 1053 lbf. The phenolic cage reduces friction and wear, ensuring reliable performance in demanding conditions.

Its open design allows for easy lubrication, maintaining optimal operation between -30°C and 110°C. The P4 tolerance class guarantees high precision for applications requiring minimal runout.

Ideal for precision machinery like spindles or high-speed tools, this lightweight bearing (0.036kg) is interchangeable with SKF models. Matched arrangements are available for applications needing preloaded sets.

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Product Parameters

  • Part Number 71904 ACE/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 20 mm
  • Bore Dia Tolerance -0.005mm to 0
  • Outer Dia 37 mm
  • Outer Dia Tolerance -0.006mm to 0
  • Width 9 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 14
  • Contact Angle 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Available
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 1053 lbf
  • Static Radial Load 504 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 78000 rpm
  • Weight 0.036 kg
  • Price（$） 144.756
Super Precision Angular Contact Ball Bearings 71904 ACE/P4A dimension drawing
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Features

Why Choose 71904 ACE/P4A Bearing for Precision Tasks?

71904 ACE/P4A Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
Its chrome steel construction ensures durability and smooth operation under dynamic radial loads up to 1053 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance at speeds up to 78,000 rpm.
With a P4 tolerance class, it delivers exceptional accuracy for demanding industrial uses.

71904 ACE/P4A Bearing operates reliably in temperatures from -30° to 110°C, suitable for varied environments.
Its open design allows easy lubrication, ensuring consistent performance over time.

Application

Industrial Uses of 71904 ACE/P4A Bearing
71904 ACE/P4A Bearing is commonly used in high-speed machine spindles, where its 25° contact angle ensures stable performance under radial and axial loads. The open design and phenolic cage make it suitable for applications requiring minimal friction and heat generation.

In robotics, 71904 ACE/P4A Bearing provides precise motion control in articulated arms and joints. Its ABEC-7 tolerance class ensures the accuracy needed for repetitive tasks in automated systems.

For medical imaging devices, 71904 ACE/P4A Bearing’s chrome steel construction offers reliability in high-precision components. The lubricated design helps maintain smooth operation during prolonged use.

Where Is 71904 ACE/P4A Bearing Used?
You’ll often find 71904 ACE/P4A Bearing in CNC machinery, where its high-speed capability and angular contact design are essential. The matched arrangement option also allows for custom configurations in complex setups.

In automotive applications, 71904 ACE/P4A Bearing supports components like turbochargers and electric motor shafts. Its dynamic radial load capacity ensures durability even under demanding conditions.

Built for Versatility: 71904 ACE/P4A Bearing
71904 ACE/P4A Bearing works well in 3D printers, providing smooth linear motion for print heads. The lightweight design and high-speed rating make it a practical choice for precision equipment.

For laboratory instruments, 71904 ACE/P4A Bearing’s low vibration and noise levels are ideal. The temperature range of -30° to 110°C ensures performance in various environments.

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