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Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4A

Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4A

The 71920 ACB/HCP4A is a super precision angular contact ball bearing with a 100mm bore and 140mm outer diameter, crafted from durable chrome steel and ceramic balls. It handles radial loads up to 4568 lbf and operates smoothly at speeds up to 20,000 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 precision applications and works in temperatures from -30°C to 110°C.

This model is interchangeable with SKF bearings and meets P4 (ABEC-7) tolerance standards for high accuracy. Ideal for machine tools or high-speed spindles where precision and reliability are key.

Weighing 0.8kg, it’s a robust choice for demanding industrial environments. Available in matched sets for paired mounting requirements.

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Product Parameters

  • Part Number 71920 ACB/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 100 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 140 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 37
  • 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 4568 lbf
  • Static Radial Load 4770 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 20000 rpm
  • Weight 0.8 kg
  • Price（$） 123.156
Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4A dimension drawing
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Features

How Is 71920 ACB/HCP4A Bearing Engineered for Reliability?

71920 ACB/HCP4A Bearing features a 25° contact angle, optimised for handling combined radial and axial loads.
Its chrome steel rings and ceramic balls enhance durability and reduce friction during high-speed operation.

The phenolic cage ensures smooth performance, even at speeds up to 20,000 rpm.
With a P4 tolerance class, it delivers precise and consistent operation in demanding applications.

71920 ACB/HCP4A Bearing’s preload option allows for customised performance based on specific needs.
Its dynamic radial load capacity of 4568 lbf ensures reliable performance under heavy loads.

The open design simplifies maintenance, while the lubricated construction extends service life.
Operating within a temperature range of -30° to 110°C, it adapts to various environmental conditions.

Application

Industrial Uses of 71920 ACB/HCP4A Bearing
71920 ACB/HCP4A Bearing is commonly used in high-speed machine tools, where its ceramic balls and phenolic cage reduce friction and heat buildup. The 25° contact angle ensures stable performance under combined radial and axial loads.

What Makes 71920 ACB/HCP4A Bearing a Preferred Choice?
In robotics, 71920 ACB/HCP4A Bearing provides precise motion control for articulated arms, thanks to its P4 tolerance class. The open design allows for easy lubrication, extending service life in continuous operation.

Perfect Fit for Automation: 71920 ACB/HCP4A Bearing
This bearing excels in automated production lines, handling rapid directional changes with minimal wear. Its matched arrangement option ensures consistent performance in paired installations.

Medical vs Industrial: Where 71920 ACB/HCP4A Bearing Excels
While suitable for industrial gearboxes, 71920 ACB/HCP4A Bearing also meets the quiet operation needs of medical imaging devices. The ceramic balls contribute to smoother rotation in sensitive applications.

How Does 71920 ACB/HCP4A Bearing Support High-Speed Operations?
With a maximum speed of 20,000 rpm, this bearing is ideal for spindle applications in milling machines. The chrome steel rings provide durability under heavy cutting loads.

Q&A

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