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Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4ATT

Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4ATT

The 71920 ACB/HCP4ATT is a super precision angular contact ball bearing with a 100mm bore and 140mm outer diameter, crafted from durable chrome steel. It handles both radial and angular loads, with a dynamic radial load capacity of 9945 lbf.

Its ceramic balls and phenolic cage reduce friction, allowing smooth operation at speeds up to 15,000 RPM. The open design simplifies lubrication, while the 25° contact angle ensures stability under heavy loads.

This bearing comes in a matched set of three, ideal for high-precision applications like machine tool spindles. It operates efficiently in temperatures from -30°C to 110°C.

Weighing 2.41kg, it’s robust yet manageable for its size. Compliant with P4A tolerance standards, it’s a reliable choice for demanding industrial environments.

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Product Parameters

  • Part Number 71920 ACB/HCP4ATT
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 100 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 140 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 60 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 37
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 3 bearings <<< TT
  • Number Of Bearings In Matched Set 3
  • Universal Matching Bearing No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 9945 lbf
  • Static Radial Load 14175 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 15000 rpm
  • Weight 2.41 kg
Super Precision Angular Contact Ball Bearings 71920 ACB/HCP4ATT dimension drawing
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Features

How Does 71920 ACB/HCP4ATT Bearing Achieve Super Precision?

71920 ACB/HCP4ATT Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
Its ceramic balls and chrome steel rings reduce friction, ensuring smooth operation even at high speeds.

The phenolic cage maintains ball alignment, enhancing durability under dynamic radial loads up to 9945 lbf.
With a maximum speed of 15,000 rpm, it delivers reliable performance in demanding conditions.

Preloaded and matched in sets of three, 71920 ACB/HCP4ATT Bearing offers consistent accuracy for precision machinery.
Its P4A tolerance class ensures tight dimensional control, meeting rigorous industry standards.

Application

Industrial Uses of 71920 ACB/HCP4ATT Bearing
71920 ACB/HCP4ATT Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The ceramic balls reduce friction, making it suitable for high-speed operations.

In robotics, 71920 ACB/HCP4ATT Bearing provides stability in articulated arms, thanks to its matched arrangement and preload capability. The phenolic cage offers lightweight durability for repetitive movements.

For aerospace applications, 71920 ACB/HCP4ATT Bearing handles radial and axial loads in flight control systems. Its P4A tolerance class guarantees the precision needed for critical components.

Where Is 71920 ACB/HCP4ATT Bearing Used?
You’ll find 71920 ACB/HCP4ATT Bearing in CNC machining centres, where its 25° contact angle improves rigidity during cutting operations. The lubricated design also extends service life.

In medical imaging devices, 71920 ACB/HCP4ATT Bearing’s ceramic balls minimise heat generation, ensuring quiet and smooth operation. The chrome steel rings add corrosion resistance for sterile environments.

Built for Heavy-Duty Use: 71920 ACB/HCP4ATT Bearing
71920 ACB/HCP4ATT Bearing excels in industrial gearboxes, where its dynamic radial load capacity handles intense power transmission. The matched set of three bearings enhances load distribution.

For electric vehicle motors, 71920 ACB/HCP4ATT Bearing’s high-speed capability and low friction contribute to energy efficiency. The open design allows for easy lubrication maintenance.

Automotive vs Aerospace: Applications of 71920 ACB/HCP4ATT Bearing
In automotive systems, 71920 ACB/HCP4ATT Bearing supports high-performance transmissions, where its preload adjustment fine-tunes shifting precision. The metric sizing fits European and Asian models.

Aerospace applications rely on 71920 ACB/HCP4ATT Bearing for flight simulator mechanisms, benefiting from its temperature stability and P4A tolerance. The ceramic balls reduce weight without sacrificing strength.

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