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Super Precision Angular Contact Ball Bearings 71821 CD/HCP4

Super Precision Angular Contact Ball Bearings 71821 CD/HCP4

The 71821 CD/HCP4 is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, designed for high-speed applications. Its compact 13mm width and chrome steel construction make it both durable and space-efficient.

With a 15° contact angle, it handles combined radial and thrust loads smoothly, supporting up to 5152 lbf dynamically. The ceramic balls and phenolic cage allow it to spin at speeds up to 16,000 RPM with minimal friction.

Its open design simplifies lubrication, while the P4 tolerance class ensures consistent performance. Ideal for precision machinery like spindles or CNC equipment where accuracy is key.

Weighing 0.29kg, it’s lightweight yet robust. Compatible with SKF bearings for easy replacement, and suitable for temperatures from -30°C to 110°C.

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Product Parameters

  • Part Number 71821 CD/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 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 5152 lbf
  • Static Radial Load 6750 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.29 kg
  • Price（$） 1383.66
Super Precision Angular Contact Ball Bearings 71821 CD/HCP4 dimension drawing
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Features

Why Choose 71821 CD/HCP4 Bearing for Precision Tasks?

71821 CD/HCP4 Bearing features a 15° contact angle, ideal for handling combined radial and axial loads with precision.
Its chrome steel rings and ceramic balls reduce friction, ensuring smooth operation even at high speeds.

The phenolic cage maintains ball alignment, enhancing durability and performance in demanding applications.
With a maximum speed of 16,000 rpm and P4 tolerance class, it delivers reliable accuracy for precision machinery.

Lubrication is optimised for long service life, reducing maintenance needs and operational downtime.
The bearing’s compact design (105 mm×130 mm×13 mm) makes it suitable for space-constrained installations.

Application

Key Fields for 71821 CD/HCP4 Bearing
In industrial settings, 71821 CD/HCP4 Bearing is commonly used in high-speed spindles and machine tools, where its angular contact design ensures precise radial and axial load handling. The ceramic balls reduce friction, making it suitable for continuous operation.

Where Is 71821 CD/HCP4 Bearing Used?
Automotive applications like electric motor shafts benefit from 71821 CD/HCP4 Bearing’s low friction and high-speed capabilities. Its phenolic cage provides stability, even under varying temperatures.

Built for Heavy-Duty Use: 71821 CD/HCP4 Bearing
For robotics and automation, 71821 CD/HCP4 Bearing offers reliable performance in articulated arms and linear guides. The P4 tolerance class ensures minimal vibration during high-precision tasks.

Medical vs Industrial: Where 71821 CD/HCP4 Bearing Excels
In medical imaging devices, 71821 CD/HCP4 Bearing’s smooth operation is crucial for accurate diagnostics. Meanwhile, industrial pumps rely on its durability for long-term use in harsh environments.

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