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Super Precision Angular Contact Ball Bearings 71821 CD/P4DGC

Super Precision Angular Contact Ball Bearings 71821 CD/P4DGC

The 71821 CD/P4DGC is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 8348 lbf and operates smoothly at speeds up to 16,000 RPM.

Its 15° contact angle and universal matching design allow flexible arrangements like back-to-back or face-to-face. The phenolic cage ensures quiet performance and longevity.

This bearing is preloaded for moderate stiffness, making it ideal for high-precision applications. It works well in temperatures from -30°C to 110°C.

Weighing 0.64kg, it’s suited for machine tools or spindles where accuracy and speed matter. Compliant with P4 tolerance standards for reliable performance.

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Product Parameters

  • Part Number 71821 CD/P4DGC
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 130 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 26 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.144 mm
  • Ball Qty 35
  • Contact Angle 15°
  • Tolerance Class P4
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Universal matching
  • Number Of Bearings In Matched Set 2
  • Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  • Preload Moderate / Class C
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 8348 lbf
  • Static Radial Load 13500 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 16000 rpm
  • Weight 0.64 kg
Super Precision Angular Contact Ball Bearings 71821 CD/P4DGC dimension drawing
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Features

Engineered for Precision: 71821 CD/P4DGC Bearing

71821 CD/P4DGC Bearing features a 15° contact angle, optimised for high-precision angular contact applications.

Its chrome steel construction ensures durability and reliable performance under dynamic radial loads up to 8348 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing operational smoothness.

With a maximum speed of 16,000 rpm, it delivers efficiency without compromising precision.

Application

Industrial Uses of 71821 CD/P4DGC Bearing
71821 CD/P4DGC Bearing is commonly used in high-precision machine tools, where its moderate preload and universal matching ensure accurate spindle performance. The open design and phenolic cage make it suitable for applications requiring minimal friction and heat generation.

Where Is 71821 CD/P4DGC Bearing Used?
In automotive systems, 71821 CD/P4DGC Bearing supports high-speed components like turbochargers and transmission shafts. Its 15° contact angle and P4 tolerance class provide the necessary stability for demanding driving conditions.

Built for Heavy-Duty Use: 71821 CD/P4DGC Bearing
For automation and robotics, 71821 CD/P4DGC Bearing excels in robotic arms and CNC machines, thanks to its chrome steel construction and dynamic radial load capacity. The tandem arrangement option also allows for flexible installation in tight spaces.

Medical vs Industrial: Where 71821 CD/P4DGC Bearing Excels
In medical imaging devices, 71821 CD/P4DGC Bearing offers reliable performance due to its precision and low noise operation. Meanwhile, in industrial settings, its high-speed capability and durability make it a go-to choice for heavy machinery.

Practical Applications of 71821 CD/P4DGC Bearing
71821 CD/P4DGC Bearing is ideal for 3D printers, where its angular contact design ensures smooth linear motion. The lubricated construction also reduces maintenance needs, making it a practical option for continuous operation.

Q&A

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