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Super Precision Angular Contact Ball Bearings 71921 ACD/HCP4A

Super Precision Angular Contact Ball Bearings 71921 ACD/HCP4A

The 71921 ACD/HCP4A is a super precision angular contact ball bearing with a 105mm bore and 145mm outer diameter, crafted from high-quality chrome steel. It features a 25° contact angle and ceramic balls for smooth operation.

This bearing handles radial loads up to 12870 lbf and reaches speeds of 15000 RPM, making it suitable for high-performance applications. Its phenolic cage ensures durability and reduced friction.

The open design allows for easy lubrication, while the P4 tolerance class guarantees precise performance. It operates efficiently in temperatures from -30°C to 110°C.

Ideal for precision machinery like spindles or CNC equipment, this bearing is interchangeable with SKF models. Weighing 0.7kg, it offers a balance of strength and precision for demanding tasks.

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Product Parameters

  • Part Number 71921 ACD/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 145 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 27
  • 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 Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 12870 lbf
  • Static Radial Load 14738 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 15000 rpm
  • Weight 0.7 kg
  • Price（$） 131.868
Super Precision Angular Contact Ball Bearings 71921 ACD/HCP4A dimension drawing
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Features

Why Choose 71921 ACD/HCP4A Bearing for Precision Tasks?

71921 ACD/HCP4A Bearing features a 25° contact angle, ideal for handling combined radial and axial loads with precision.
Its ceramic balls and chrome steel rings ensure smooth operation, even at high speeds up to 15,000 rpm.

The phenolic cage in 71921 ACD/HCP4A Bearing reduces friction and wear, enhancing longevity.
With a dynamic radial load capacity of 12870 lbf, it performs reliably in demanding applications.

71921 ACD/HCP4A Bearing is available with preload options for improved accuracy and stability.
Its P4 tolerance class guarantees consistent performance in precision machinery.

Application

Common Applications of 71921 ACD/HCP4A Bearing
71921 ACD/HCP4A Bearing is widely used in high-precision machine tools, where its 25° contact angle ensures accurate radial and axial load handling. The ceramic balls reduce friction, making it suitable for high-speed spindle applications.

In aerospace systems, 71921 ACD/HCP4A Bearing supports components like turbine shafts, thanks to its phenolic cage and P4 tolerance class. Its lightweight design also helps in reducing overall aircraft weight.

For robotics, 71921 ACD/HCP4A Bearing’s matched arrangement allows for smooth motion in articulated arms. The open seal design simplifies lubrication, extending service life in automated environments.

Medical imaging devices benefit from 71921 ACD/HCP4A Bearing’s low vibration and high-speed capabilities. The chrome steel rings provide durability, ensuring reliable performance in critical diagnostic equipment.

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