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Super Precision Angular Contact Ball Bearings S71911 ACE/P4A

Super Precision Angular Contact Ball Bearings S71911 ACE/P4A

The S71911 ACE/P4A is a super precision angular contact ball bearing with a 55mm bore and 80mm 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 3330 lbf dynamically. It operates smoothly at speeds up to 21,000 RPM, thanks to its phenolic cage and pre-lubrication.

The sealed design keeps contaminants out, reducing maintenance needs. Its P4 tolerance class ensures high accuracy, ideal for precision machinery like CNC spindles or medical equipment.

Weighing just 0.17kg, it’s lightweight yet durable. Compliant with standard temperature ranges (-30°C to 110°C), it’s a reliable choice for demanding industrial environments.

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Product Parameters

  • Part Number S71911 ACE/P4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.007mm to 0
  • Outer Dia 80 mm
  • Outer Dia Tolerance -0.007mm to 0
  • Width 13 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 7.938 mm
  • Ball Qty 21
  • Contact Angle 25°
  • Tolerance Class P4 (ABEC-7)
  • System of Measurement Metric
  • Seal Type Sealed
  • Matched Arrangement Available
  • Preload Available
  • For Load Direction Angular Contact
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Phenolic
  • Dynamic Radial Load 3330 lbf
  • Static Radial Load 2250 lbf
  • Lubrication Lubricated
  • Temperature Range -30° to 110 °C
  • Max Speed 21000 rpm
  • Weight 0.17 kg
  • Price（$） 528.111
Super Precision Angular Contact Ball Bearings S71911 ACE/P4A dimension drawing
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Features

How Is S71911 ACE/P4A Bearing Engineered for Reliability?

S71911 ACE/P4A Bearing features a 25° contact angle, optimised for handling combined radial and axial loads.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction and wear.

The bearing is lubricated for smooth operation and can reach speeds up to 21,000 rpm.
With a dynamic radial load capacity of 3330 lbf, it performs reliably in demanding applications.

S71911 ACE/P4A Bearing’s P4 tolerance class guarantees high precision, ideal for critical machinery.
Its sealed design protects against contaminants, extending service life in harsh conditions.

Application

Common Applications of S71911 ACE/P4A Bearing
S71911 ACE/P4A Bearing is widely used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The sealed construction helps maintain performance in environments with dust or debris.

In robotics, S71911 ACE/P4A Bearing provides smooth motion control for articulated arms, thanks to its phenolic cage reducing friction. Its P4 tolerance class makes it suitable for applications demanding tight precision.

For aerospace components, S71911 ACE/P4A Bearing handles both radial and axial loads efficiently, ideal for navigation systems. The chrome steel construction offers durability under varying temperatures.

Automotive testing equipment benefits from S71911 ACE/P4A Bearing’s high-speed capability, ensuring reliable data collection. Its matched arrangement option allows for customised performance in specialised setups.

Medical imaging devices rely on S71911 ACE/P4A Bearing for quiet, vibration-free operation during scans. The lubricated design ensures long service life with minimal maintenance required.

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