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Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4

Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4

The 71821 ACD/HCP4 is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from chrome steel for durability. Its compact 13mm width makes it suitable for space-sensitive applications.

With a 25° contact angle, it handles both radial and axial loads efficiently, supporting up to 4860 lbf dynamically. It spins smoothly at speeds up to 15000 RPM, thanks to its ceramic balls and phenolic cage.

The open design allows easy lubrication, while the P4 tolerance class ensures high precision. Ideal for machine tools or high-speed spindles where accuracy is key.

Weighing just 0.29kg, it’s lightweight yet robust. Compatible with SKF bearings, it’s a reliable choice for replacements or upgrades. Works well in temperatures from -30°C to 110°C.

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Product Parameters

  • Part Number 71821 ACD/HCP4
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 130 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 13 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 35
  • 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 4860 lbf
  • Static Radial Load 6412 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 15000 rpm
  • Weight 0.29 kg
  • Price（$） 1383.192
Super Precision Angular Contact Ball Bearings 71821 ACD/HCP4 dimension drawing
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Features

Performance Features of 71821 ACD/HCP4 Bearing

71821 ACD/HCP4 Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and ceramic balls reduce friction, enhancing precision and speed capabilities.

The phenolic cage ensures smooth operation, even at high speeds up to 15,000 rpm.
With a dynamic radial load capacity of 4860 lbf, it handles demanding conditions reliably.

71821 ACD/HCP4 Bearing’s P4 tolerance class guarantees consistent performance in precision tasks.
Its open design allows for easy lubrication, maintaining efficiency over time.

Application

Common Applications of 71821 ACD/HCP4 Bearing
71821 ACD/HCP4 Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The ceramic balls reduce friction, making it ideal for high-speed operations.

In robotics, 71821 ACD/HCP4 Bearing provides smooth motion control for articulated arms, thanks to its phenolic cage and P4 tolerance. Its lightweight construction also helps in reducing overall system weight.

For aerospace applications, 71821 ACD/HCP4 Bearing handles radial and axial loads in avionics systems, where reliability is critical. The open seal design allows for easy lubrication, extending service life in demanding conditions.

Where Is 71821 ACD/HCP4 Bearing Used?
You’ll often find 71821 ACD/HCP4 Bearing in CNC machines, where its precision and speed capabilities enhance cutting accuracy. The chrome steel rings add durability for long-term use.

In medical imaging devices, 71821 ACD/HCP4 Bearing ensures quiet and vibration-free operation, crucial for clear diagnostics. The ceramic balls also minimise heat generation during prolonged use.

Built for Heavy-Duty Use: 71821 ACD/HCP4 Bearing
71821 ACD/HCP4 Bearing excels in industrial pumps, handling both radial and thrust loads with ease. Its matched arrangement option allows for customised preload settings.

For electric vehicle motors, 71821 ACD/HCP4 Bearing supports high RPM demands while maintaining efficiency. The phenolic cage resists wear, even under continuous operation.

Automotive vs Aerospace: Applications of 71821 ACD/HCP4 Bearing
In automotive transmissions, 71821 ACD/HCP4 Bearing ensures smooth gear shifts with its angular contact design. The metric sizing fits seamlessly into European and Asian models.

For aerospace actuators, 71821 ACD/HCP4 Bearing’s P4 tolerance guarantees precision in flight control systems. The ceramic balls also reduce weight, a key factor in aircraft performance.

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