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Super Precision Angular Contact Ball Bearings 71821 CD/P4DGA

Super Precision Angular Contact Ball Bearings 71821 CD/P4DGA

The 71821 CD/P4DGA is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. Its 15° contact angle and extra-light preload ensure smooth operation under radial loads up to 8348 lbf.

The open design and phenolic cage allow for easy lubrication, while the P4 tolerance class guarantees high accuracy. It can handle speeds up to 16,000 RPM and temperatures from -30°C to 110°C.

This bearing comes in a matched set of two, suitable for universal mounting in back-to-back, face-to-face, or tandem arrangements. Ideal for high-precision applications like machine tool spindles or high-speed robotics.

Weighing 0.64kg, it offers a balance of strength and precision, interchangeable with SKF bearings for easy replacement.

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Product Parameters

  • Part Number 71821 CD/P4DGA
  • 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 Extra light / Class A
  • 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/P4DGA dimension drawing
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Features

Performance Features of 71821 CD/P4DGA Bearing

71821 CD/P4DGA Bearing is designed with a 15° contact angle, ideal for handling combined radial and axial loads.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction for smoother operation.

With a dynamic radial load capacity of 8348 lbf, it performs reliably in high-precision applications.
The P4 tolerance class guarantees exceptional accuracy, making it suitable for demanding machinery.

This bearing operates efficiently at speeds up to 16,000 rpm, maintaining stability under stress.
Its universal matching design allows flexible arrangement, catering to various installation needs.

Application

Key Fields for 71821 CD/P4DGA Bearing
71821 CD/P4DGA Bearing is widely used in high-precision machine tools, where its 15° contact angle ensures accurate radial and axial load handling. The universal matching feature allows flexible arrangements like back-to-back or tandem setups.

In automotive applications, 71821 CD/P4DGA Bearing supports high-speed spindle systems, thanks to its extra-light preload and phenolic cage. Its P4 tolerance class makes it ideal for demanding gearbox components.

For medical imaging devices, 71821 CD/P4DGA Bearing’s chrome steel construction delivers reliable performance under strict hygiene standards. The lubricated design minimises maintenance while ensuring smooth operation in sensitive environments.

How Does 71821 CD/P4DGA Bearing Improve Performance?
71821 CD/P4DGA Bearing enhances spindle efficiency in CNC machines by reducing friction with its 35-ball design. The phenolic cage dampens vibrations, crucial for achieving fine surface finishes.

In robotics, 71821 CD/P4DGA Bearing’s tandem arrangement capability supports articulated arms requiring precise motion control. Its 16,000 rpm rating suits high-speed automation tasks without compromising accuracy.

Built for Heavy-Duty Use: 71821 CD/P4DGA Bearing
71821 CD/P4DGA Bearing handles heavy radial loads in industrial pumps, where its 13,500 lbf static capacity ensures longevity. The open seal design simplifies relubrication in harsh plant conditions.

For aerospace testing equipment, 71821 CD/P4DGA Bearing maintains stability across -30°C to 110°C ranges. Its matched set configuration guarantees consistent performance in critical measurement systems.

Automotive vs Aerospace: Applications of 71821 CD/P4DGA Bearing
In car transmissions, 71821 CD/P4DGA Bearing manages angular loads during gear shifts with minimal heat generation. The metric dimensions align with European engine designs.

For aircraft hydraulic systems, 71821 CD/P4DGA Bearing’s P4-class precision meets strict aviation tolerances. The lightweight phenolic cage reduces rotational mass in fuel pump assemblies.

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