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Super Precision Angular Contact Ball Bearings 71921 CD/HCP4A

Super Precision Angular Contact Ball Bearings 71921 CD/HCP4A

The 71921 CD/HCP4A is a super precision angular contact ball bearing with a 105mm bore and 145mm outer diameter, designed for high-speed applications. Its 15° contact angle efficiently handles both radial and axial loads, with dynamic radial load capacity up to 13905 lbf.

Made from chrome steel rings and ceramic balls, it offers smooth operation at speeds up to 16000 RPM. The phenolic cage ensures durability while keeping the bearing lightweight at just 0.7kg.

This open-design bearing comes pre-lubricated and can be matched for universal use, making it versatile for various setups. It performs reliably in temperatures from -30°C to 110°C.

Ideal for precision machinery like CNC spindles or high-speed motors where accuracy is crucial. Its P4 tolerance class (equivalent to ABEC-7) ensures consistent performance in demanding conditions.

Interchangeable with SKF bearings, it’s a practical choice for replacements or upgrades. The ceramic balls reduce friction, enhancing both speed and lifespan in continuous operation.

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Product Parameters

  • Part Number 71921 CD/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 145 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 12.7 mm
  • Ball Qty 27
  • Contact Angle 15°
  • 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 13905 lbf
  • Static Radial Load 15638 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.7 kg
  • Price（$） 131.733
Super Precision Angular Contact Ball Bearings 71921 CD/HCP4A dimension drawing
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Features

How Is 71921 CD/HCP4A Bearing Engineered for Reliability?

71921 CD/HCP4A Bearing features a 15° contact angle, optimised for precision angular contact applications.
Its chrome steel rings and ceramic balls enhance durability while reducing friction.

The phenolic cage ensures smooth operation, even at high speeds up to 16,000 rpm.
With a dynamic radial load capacity of 13905 lbf, it handles demanding tasks with ease.

71921 CD/HCP4A Bearing operates efficiently within a temperature range of -30° to 110°C.
Its P4 tolerance class guarantees high precision for critical applications.

Application

Ideal for Precision: 71921 CD/HCP4A Bearing
The 71921 CD/HCP4A Bearing is a go-to choice for high-speed machine tools, where its 15° contact angle ensures smooth operation under angular loads. Its ceramic balls reduce friction, making it ideal for precision grinding applications.

In robotics, the 71921 CD/HCP4A Bearing excels in articulated arms, providing reliable movement with minimal vibration. The phenolic cage adds durability, even in continuous operation scenarios.

For aerospace applications, the 71921 CD/HCP4A Bearing’s P4 tolerance class guarantees accuracy in critical components like gyroscopes. Its lubricated design ensures consistent performance across a wide temperature range.

Automotive enthusiasts appreciate the 71921 CD/HCP4A Bearing in performance gearboxes, where its high dynamic load capacity handles rigorous conditions. The open seal design simplifies maintenance during routine checks.

In medical imaging devices, the 71921 CD/HCP4A Bearing’s chrome steel rings offer stability for precise rotational movements. Its lightweight construction (0.7kg) helps reduce overall equipment weight without compromising strength.

Q&A

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