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Super Precision Angular Contact Ball Bearings 71821 CD/P4DGB

Super Precision Angular Contact Ball Bearings 71821 CD/P4DGB

The 71821 CD/P4DGB is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from durable chrome steel. Its compact 26mm width makes it suitable for tight spaces while handling high radial loads up to 8348 lbf.

With a 15° contact angle and universal matching design, it offers smooth operation at speeds up to 16,000 RPM. The phenolic cage ensures quiet performance, and the open seal allows for easy lubrication.

This bearing set includes two matched units, suitable for back-to-back, face-to-face, or tandem arrangements. Ideal for precision applications like machine tool spindles or high-speed robotics.

Weighing 0.64kg, it operates reliably in temperatures from -30°C to 110°C. Compliant with P4 tolerance class for exceptional accuracy.

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Product Parameters

  • Part Number 71821 CD/P4DGB
  • 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 Light / Class B
  • 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
  • Price（$） 581.139
Super Precision Angular Contact Ball Bearings 71821 CD/P4DGB dimension drawing
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Features

Performance Features of 71821 CD/P4DGB Bearing

71821 CD/P4DGB Bearing is designed with a 15° contact angle, optimising load distribution for angular contact applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and wear.

With a dynamic radial load capacity of 8348 lbf, it handles demanding conditions with ease.
The P4 tolerance class guarantees high precision, making it suitable for critical tasks.

Operating at speeds up to 16,000 rpm, it balances performance and reliability.
Its universal matching design allows flexible arrangement, including back-to-back or face-to-face configurations.

The bearing comes pre-lubricated, reducing initial setup time and maintenance.
Its temperature range of -30°C to 110°C ensures consistent performance in varied environments.

Application

Ideal for Precision: 71821 CD/P4DGB Bearing
The 71821 CD/P4DGB Bearing is widely used in high-precision machine tools, where its 15° contact angle ensures accurate radial and axial load handling. Its universal matching design allows flexible arrangements for various operational needs.

In automotive applications, 71821 CD/P4DGB Bearing enhances performance in gearboxes and wheel hubs, thanks to its light preload and phenolic cage. The chrome steel construction provides durability under demanding conditions.

For medical imaging devices, 71821 CD/P4DGB Bearing offers reliable smoothness and low noise, critical for sensitive equipment. Its P4 tolerance class guarantees consistent performance in precision-driven environments.

Automation systems benefit from 71821 CD/P4DGB Bearing’s high-speed capability, making it suitable for robotic arms and CNC machinery. The open seal design simplifies maintenance in continuous-use scenarios.

In aerospace components, 71821 CD/P4DGB Bearing handles both radial and thrust loads efficiently. Its temperature range and lubricated design ensure stability in varying operational conditions.

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