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Super Precision Angular Contact Ball Bearings 71909 ACD/HCP4A

Super Precision Angular Contact Ball Bearings 71909 ACD/HCP4A

The 71909 ACD/HCP4A is a super precision angular contact ball bearing with a 45mm bore and 68mm outer diameter, designed for high-speed applications. It features a 25° contact angle and is made from durable chrome steel with ceramic balls for smooth operation.

This bearing handles radial loads up to 2790 lbf and can reach speeds of 34,000 RPM, thanks to its phenolic cage and precision P4 tolerance. Its open design allows for easy lubrication and maintenance.

The ceramic balls reduce friction, making it ideal for high-speed machinery like spindles or dental tools. It operates efficiently in temperatures from -30°C to 110°C.

Weighing just 0.12kg, it’s lightweight yet robust. Compatible with SKF bearings, it’s a reliable choice for precision applications requiring smooth, high-speed performance.

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Product Parameters

  • Part Number 71909 ACD/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 45 mm
  • Bore Dia Tolerance -0.006mm to 0
  • Outer Dia 68 mm
  • Outer Dia Tolerance -0.007mm to 0
  • Width 12 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 6.35 mm
  • Ball Qty 23
  • 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 2790 lbf
  • Static Radial Load 2025 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 34000 rpm
  • Weight 0.12 kg
  • Price（$） 324.396
Super Precision Angular Contact Ball Bearings 71909 ACD/HCP4A dimension drawing
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Features

How Does 71909 ACD/HCP4A Bearing Achieve Super Precision?

71909 ACD/HCP4A Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
The ceramic balls and chrome steel rings work together to reduce friction and enhance durability.

With a dynamic radial load capacity of 2790 lbf, it handles demanding tasks while maintaining accuracy.
Its P4 tolerance class ensures consistent performance, even at high speeds up to 34,000 rpm.

The phenolic cage keeps the ceramic balls aligned, minimising wear and noise.
This design makes 71909 ACD/HCP4A Bearing suitable for precision instruments and high-speed machinery.

Application

Common Applications of 71909 ACD/HCP4A Bearing
71909 ACD/HCP4A Bearing is widely used in high-speed machine tools, where its precision and angular contact design ensure accurate spindle performance. The ceramic balls reduce friction, making it ideal for applications demanding smooth rotation.

In robotics, 71909 ACD/HCP4A Bearing supports articulated arms, providing stability and load capacity for repetitive movements. Its phenolic cage offers lightweight durability, perfect for automated systems.

For aerospace components, 71909 ACD/HCP4A Bearing handles both radial and axial loads efficiently, thanks to its 25° contact angle. The P4 tolerance class ensures reliability in critical flight systems.

Medical imaging devices benefit from 71909 ACD/HCP4A Bearing’s low-noise operation and high-speed capability. The chrome steel rings and ceramic balls maintain precision even under continuous use.

In electric motors, 71909 ACD/HCP4A Bearing’s lubricated design reduces wear, extending the lifespan of high-RPM applications. Its metric sizing fits seamlessly into European and Asian motor designs.

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