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Super Precision Angular Contact Ball Bearings 71909 ACD/P4AQBTB

Super Precision Angular Contact Ball Bearings 71909 ACD/P4AQBTB

The 71909 ACD/P4AQBTB is a super precision angular contact ball bearing with a 45mm bore and 68mm outer diameter, crafted from high-quality chrome steel. It features a 25° contact angle and comes in a matched set of four bearings for balanced performance.

Designed for angular contact loads, it handles dynamic radial loads up to 7312 lbf and spins smoothly at speeds up to 41,000 RPM. The phenolic cage ensures durability and quiet operation.

Its open design allows easy lubrication, while the P4A tolerance class guarantees precise performance. Ideal for high-speed applications like machine tool spindles or precision instruments.

Weighing 0.52kg, this bearing is robust yet lightweight. It operates efficiently in temperatures from -30°C to 110°C, making it versatile for various industrial uses.

The matched set arrangement ensures consistent performance, though it’s not universally interchangeable. A reliable choice for demanding precision tasks.

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Product Parameters

  • Part Number 71909 ACD/P4AQBTB
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 45 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 68 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 48 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 6.35 mm
  • Ball Qty 23
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement 4 bearings <>>> QBT
  • Number Of Bearings In Matched Set 4
  • Universal Matching Bearing No
  • Preload Light / Class B
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 7312 lbf
  • Static Radial Load 8100 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 41000 rpm
  • Weight 0.52 kg
Super Precision Angular Contact Ball Bearings 71909 ACD/P4AQBTB dimension drawing
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Features

Engineered for Precision: 71909 ACD/P4AQBTB Bearing

71909 ACD/P4AQBTB Bearing features a 25° contact angle, optimised for high-precision angular contact applications.
Its chrome steel rings and balls ensure durability and smooth operation under dynamic radial loads up to 7312 lbf.

The phenolic cage maintains ball alignment, reducing friction and enhancing performance at speeds up to 41,000 rpm.
With a tight P4A tolerance class, it delivers consistent accuracy in demanding conditions.

71909 ACD/P4AQBTB Bearing operates efficiently within a temperature range of -30°C to 110°C.
Its matched arrangement of four bearings ensures balanced load distribution for enhanced reliability.

The open design allows for easy lubrication, maintaining optimal performance over time.
Light preload class B further contributes to its precision and longevity in high-speed applications.

Application

Industrial Uses of 71909 ACD/P4AQBTB Bearing
71909 ACD/P4AQBTB Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The matched arrangement of four bearings provides stability in demanding industrial environments.

In automotive applications, 71909 ACD/P4AQBTB Bearing supports components like wheel hubs and transmissions, thanks to its light preload and high-speed capability. The chrome steel construction offers durability under heavy loads.

For robotics, 71909 ACD/P4AQBTB Bearing is ideal for articulated arms and joints, where smooth motion and precision are essential. The phenolic cage reduces friction, enhancing performance in automated systems.

Medical imaging devices benefit from 71909 ACD/P4AQBTB Bearing’s consistent operation and low noise. Its P4A tolerance class ensures reliability in sensitive equipment like MRI scanners.

In aerospace, 71909 ACD/P4AQBTB Bearing is used in control systems and actuators, where its high-speed performance and temperature resistance are crucial. The open design allows for easy lubrication and maintenance.

Q&A

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