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Super Precision Angular Contact Ball Bearings 71911 CBGA/HCP4A

Super Precision Angular Contact Ball Bearings 71911 CBGA/HCP4A

The 71911 CBGA/HCP4A is a super precision angular contact ball bearing with a 55mm bore and 80mm outer diameter, designed for high-speed applications. Its 15° contact angle and ceramic balls ensure smooth operation under radial loads up to 2239 lbf.

The bearing features a phenolic cage and chrome steel rings, offering durability and low friction. It can reach speeds up to 39,000 RPM and works in temperatures from -30°C to 110°C.

Available in matched sets of two, it supports universal mounting configurations like back-to-back or face-to-face. Ideal for precision machinery, spindles, or high-speed tools where accuracy is key.

Weighing just 0.17kg, it’s lightweight yet robust, meeting P4A tolerance standards for reliable performance.

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Product Parameters

  • Part Number 71911 CBGA/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 55 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 80 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 13 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 5.556 mm
  • Ball Qty 28
  • Contact Angle 15°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement Available
  • 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 Ceramic
  • Cage Material Phenolic
  • Dynamic Radial Load 2239 lbf
  • Static Radial Load 1834 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 39000 rpm
  • Weight 0.17 kg
Super Precision Angular Contact Ball Bearings 71911 CBGA/HCP4A dimension drawing
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Features

How Does 71911 CBGA/HCP4A Bearing Achieve Super Precision?

71911 CBGA/HCP4A Bearing features a 15° contact angle, optimised for high-precision angular contact applications.
Its ceramic balls and chrome steel rings ensure minimal friction and enhanced durability.

With a dynamic radial load capacity of 2239 lbf, it handles demanding operations smoothly.
The phenolic cage maintains ball alignment, contributing to its P4A tolerance class.

Designed for extra light preload, 71911 CBGA/HCP4A Bearing excels in high-speed applications up to 39,000 rpm.
Its universal matching capability allows flexible arrangements like back-to-back or face-to-face mounting.

The open design and lubrication ensure reliable performance within a -30°C to 110°C temperature range.
This makes it suitable for precision machinery requiring consistent accuracy.

Application

Super Precision Angular Contact Ball Bearings 71911 CBGA/HCP4A are commonly used in high-speed machine tools, where their 15° contact angle ensures smooth rotation under radial and axial loads. The ceramic balls reduce friction, making them ideal for precision grinding applications.
In robotics, 71911 CBGA/HCP4A Bearings provide reliable performance in articulated arms, thanks to their phenolic cage and matched arrangement. The extra-light preload helps maintain accuracy in repetitive movements.
For aerospace applications, 71911 CBGA/HCP4A Bearings handle the demanding conditions of flight control systems, where their P4A tolerance class guarantees consistent operation. The open design allows for easy lubrication in high-speed scenarios.
Medical imaging devices benefit from 71911 CBGA/HCP4A Bearings’ low vibration and high-speed capabilities, ensuring clear scans. The chrome steel rings offer durability in sterilisation environments.
In automotive testing equipment, 71911 CBGA/HCP4A Bearings support precise measurements with their stable performance. The universal matching feature simplifies installation in complex setups.

Q&A

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