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Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4DBA

Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4DBA

The 71821 ACD/HCP4DBA is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel and ceramic balls. It handles radial loads up to 7898 lbf and spins smoothly at speeds up to 16,000 RPM.

Its 25° contact angle and extra-light preload ensure precise performance, while the phenolic cage offers quiet operation. The open design allows easy lubrication, making maintenance straightforward.

This matched set of two bearings (DB arrangement) is ideal for high-precision applications like machine tools or spindles. It operates reliably in temperatures from -30°C to 110°C.

Weighing 0.58kg, it’s a robust yet lightweight choice for demanding environments. Compliant with P4 tolerance standards for exceptional accuracy.

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Product Parameters

  • Part Number 71821 ACD/HCP4DBA
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 130 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 26 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 35
  • Contact Angle 25°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 2 bearings <> DB
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing No
  • Preload Extra light / Class A
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 7898 lbf
  • Static Radial Load 12825 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.58 kg
Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4DBA dimension drawing
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Features

Performance Features of 71821 ACD/HCP4DBA Bearing

71821 ACD/HCP4DBA Bearing features a 25° contact angle, optimised for angular contact loads.
Its chrome steel rings and ceramic balls provide a balance of strength and smooth operation.

The phenolic cage ensures stability at high speeds, up to 16,000 rpm.
With a dynamic radial load capacity of 7898 lbf, it handles demanding applications with ease.

Precision-engineered to P4 tolerance class, 71821 ACD/HCP4DBA Bearing offers reliable performance.
Its matched arrangement of two bearings ensures consistent load distribution.

The extra light preload reduces friction, enhancing efficiency.
Operating between -30°C to 110°C, it performs well in varied temperature conditions.

Application

Industrial Uses of 71821 ACD/HCP4DBA Bearing
71821 ACD/HCP4DBA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate alignment under radial and axial loads. The ceramic balls reduce friction, making it suitable for high-speed operations.

In automotive applications, 71821 ACD/HCP4DBA Bearing supports performance in gearboxes and electric motors, thanks to its extra light preload and durable chrome steel rings. The matched arrangement of two bearings enhances stability in demanding conditions.

For medical imaging devices, 71821 ACD/HCP4DBA Bearing’s phenolic cage and ceramic balls provide quiet, smooth operation essential for sensitive equipment. Its P4 tolerance class guarantees the precision needed in diagnostic machines.

Automation systems benefit from 71821 ACD/HCP4DBA Bearing’s ability to handle high speeds and loads in robotic arms and CNC machinery. The open seal design allows for easy lubrication, extending service life in continuous operation.

In consumer electronics like high-end printers, 71821 ACD/HCP4DBA Bearing’s compact size and reliable performance ensure consistent operation. The ceramic balls also help reduce wear, making it a cost-effective choice for long-term use.

Q&A

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