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Super Precision Angular Contact Ball Bearings 71821 ACD/P4

Super Precision Angular Contact Ball Bearings 71821 ACD/P4

The 71821 ACD/P4 is a super precision angular contact ball bearing with a 105mm bore and 130mm outer diameter, crafted from high-quality chrome steel. Its compact 13mm width makes it suitable for space-sensitive applications.

With a 25° contact angle, it handles both radial and axial loads efficiently, supporting up to 4860 lbf dynamically. It spins smoothly at speeds up to 12,000 RPM, ideal for high-performance machinery.

The open design allows easy lubrication, while the phenolic cage ensures quiet operation and durability. It operates reliably in temperatures from -30°C to 110°C.

This bearing meets the P4 tolerance class (ABEC-7), ensuring exceptional precision. Perfect for applications like machine tools or spindles where accuracy and speed are crucial. Weighing just 0.32kg, it balances strength and lightweight design.

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Product Parameters

  • Part Number 71821 ACD/P4
  • 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 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 4860 lbf
  • Static Radial Load 6412 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 12000 rpm
  • Weight 0.32 kg
  • Price（$） 1382.823
Super Precision Angular Contact Ball Bearings 71821 ACD/P4 dimension drawing
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Features

Performance Features of 71821 ACD/P4 Bearing

71821 ACD/P4 Bearing is designed with a 25° contact angle, optimising load distribution for angular contact applications.
The chrome steel rings and balls enhance durability, while the phenolic cage ensures smooth operation at high speeds.

With a dynamic radial load capacity of 4860 lbf, 71821 ACD/P4 Bearing handles demanding conditions reliably.
Its P4 tolerance class (ABEC-7) guarantees precision, making it suitable for high-accuracy machinery.

71821 ACD/P4 Bearing operates efficiently at speeds up to 12,000 rpm, maintaining performance in a wide temperature range.
The open design allows for easy lubrication, reducing friction and extending service life.

Application

Industrial Uses of 71821 ACD/P4 Bearing
71821 ACD/P4 Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The phenolic cage reduces friction, making it suitable for high-speed operations.

Where Is 71821 ACD/P4 Bearing Used?
In automotive applications, 71821 ACD/P4 Bearing supports gearboxes and differential systems, handling both radial and axial loads efficiently. Its P4 tolerance class ensures consistent performance in demanding conditions.

Built for Heavy-Duty Use: 71821 ACD/P4 Bearing
For automation systems, 71821 ACD/P4 Bearing provides reliable performance in robotic arms and CNC machines. The chrome steel construction offers durability, even in continuous operation.

Medical vs Industrial: Where 71821 ACD/P4 Bearing Excels
In medical imaging devices, 71821 ACD/P4 Bearing’s precision and low noise are crucial for clear diagnostics. Industrial applications benefit from its ability to handle heavy loads without compromising accuracy.

Practical Applications of 71821 ACD/P4 Bearing
71821 ACD/P4 Bearing is ideal for 3D printers, ensuring smooth movement of print heads. Its open design allows for easy lubrication, extending the bearing’s lifespan in high-use environments.

Q&A

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