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Super Precision Angular Contact Ball Bearings 71820 ACD/HCP4

Super Precision Angular Contact Ball Bearings 71820 ACD/HCP4

The 71820 ACD/HCP4 is a super precision angular contact ball bearing with a 100mm bore and 125mm outer diameter, crafted from high-quality chrome steel and ceramic balls. It handles radial loads up to 4770 lbf and operates smoothly at speeds up to 15,000 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.

With a P4 tolerance class, it’s ideal for high-precision machinery like CNC spindles or medical equipment. The ceramic balls reduce friction, enhancing speed and durability.

Weighing just 0.28kg, it’s lightweight yet robust, suitable for temperatures from -30°C to 110°C. Interchangeable with SKF bearings, it’s a reliable choice for replacements.

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Product Parameters

  • Part Number 71820 ACD/HCP4
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 100 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 125 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 13 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 34
  • Contact Angle 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 4770 lbf
  • Static Radial Load 6188 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 15000 rpm
  • Weight 0.28 kg
  • Price（$） 1271.556
Super Precision Angular Contact Ball Bearings 71820 ACD/HCP4 dimension drawing
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Features

Performance Features of 71820 ACD/HCP4 Bearing

71820 ACD/HCP4 Bearing features a 25° contact angle, optimised for handling combined radial and axial loads.
Its chrome steel rings and ceramic balls enhance durability while reducing friction.
With a dynamic radial load capacity of 4770 lbf, it delivers reliable performance in precision applications.
The phenolic cage ensures smooth operation at speeds up to 15,000 rpm.

How Does 71820 ACD/HCP4 Bearing Reduce Friction?

71820 ACD/HCP4 Bearing uses ceramic balls to minimise friction, improving efficiency and lifespan.
The precision P4 tolerance class ensures consistent performance in high-speed applications.
Its open design allows for easy lubrication, further reducing wear.
The phenolic cage maintains ball alignment, contributing to smoother operation.

Engineered for Precision: 71820 ACD/HCP4 Bearing

71820 ACD/HCP4 Bearing is designed for super precision with ABEC-7 (P4) tolerance standards.
Its 34 ceramic balls and phenolic cage provide low vibration and high-speed capability.
The bearing operates efficiently within a temperature range of -30° to 110°C.
With a static radial load of 6188 lbf, it offers stability in demanding conditions.

Steel vs Ceramic Bearings: Strengths of 71820 ACD/HCP4 Bearing

71820 ACD/HCP4 Bearing combines chrome steel rings with ceramic balls for optimal performance.
This hybrid design offers better heat resistance and lower friction than all-steel bearings.
The ceramic balls reduce wear, extending the bearing’s service life.
Its 15,000 rpm maximum speed makes it suitable for high-performance applications.

Application

Essential Roles of 71820 ACD/HCP4 Bearing
71820 ACD/HCP4 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 ideal for high-speed operations.

In robotics, 71820 ACD/HCP4 Bearing provides smooth motion control for articulated arms and automated systems. Its phenolic cage offers lightweight durability, perfect for repetitive movements.

For aerospace applications, 71820 ACD/HCP4 Bearing’s P4 tolerance class guarantees reliability in critical components like gyroscopes. The chrome steel rings withstand harsh conditions while maintaining precision.

Where Is 71820 ACD/HCP4 Bearing Used?
You’ll often find 71820 ACD/HCP4 Bearing in dental drills, where its low friction and high-speed capabilities are essential. The open design allows for easy lubrication, extending service life.

In electric motors, 71820 ACD/HCP4 Bearing supports high rotational speeds with minimal heat generation. Its ceramic balls and phenolic cage contribute to energy efficiency and quiet operation.

Built for Heavy-Duty Use: 71820 ACD/HCP4 Bearing
71820 ACD/HCP4 Bearing excels in industrial pumps, handling both radial and thrust loads effortlessly. The lubricated design ensures consistent performance even under continuous use.

For CNC machinery, 71820 ACD/HCP4 Bearing’s precision and durability make it a trusted choice. Its metric dimensions ensure compatibility with a wide range of equipment.

Automotive vs Aerospace: Applications of 71820 ACD/HCP4 Bearing
In automotive transmissions, 71820 ACD/HCP4 Bearing manages high-speed rotations and angular loads. Its ceramic balls reduce wear, prolonging component life.

Aerospace systems rely on 71820 ACD/HCP4 Bearing for its precision and reliability in navigation equipment. The P4 tolerance class ensures accuracy in demanding environments.

Q&A

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