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Super Precision Angular Contact Ball Bearings 71904 ACDGA/HCP4A

Super Precision Angular Contact Ball Bearings 71904 ACDGA/HCP4A

The 71904 ACDGA/HCP4A is a super precision angular contact ball bearing with a 20mm bore and 37mm outer diameter, designed for high-speed applications. Its 25° contact angle and ceramic balls ensure smooth operation under radial loads up to 1287 lbf.

This open-type bearing can reach speeds of 75,000 RPM, making it suitable for demanding tasks like spindle drives or precision tools. The phenolic cage and chrome steel rings provide durability while keeping weight low at just 0.033kg.

With an extra light preload (Class A) and P4A tolerance, it offers excellent accuracy for matched arrangements. Works in temperatures from -30°C to 110°C and comes pre-lubricated for easy installation.

Ideal for back-to-back, face-to-face, or tandem configurations in machine tools or aerospace applications. Interchangeable with SKF bearings for convenient replacement.

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Product Parameters

  • Part Number 71904 ACDGA/HCP4A
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 20 mm
  • Bore Dia Tolerance -0.004mm to 0
  • Outer Dia 37 mm
  • Outer Dia Tolerance -0.004mm to 0
  • Width 9 mm
  • Width Tolerance -0.2mm to 0
  • Ball Dia 4.762 mm
  • Ball Qty 15
  • Contact Angle 25°
  • Tolerance Class P4A
  • System of Measurement Metric
  • Seal Type Open
  • Matched Arrangement No
  • Number Of Bearings In Matched Set 3
  • 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 1287 lbf
  • Static Radial Load 686 lbf
  • Lubrication Lubricated
  • Temperature Range - 30°C to 110 °C
  • Max Speed 75000 rpm
  • Weight 0.033 kg
Super Precision Angular Contact Ball Bearings 71904 ACDGA/HCP4A dimension drawing
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Features

Performance Features of 71904 ACDGA/HCP4A Bearing

71904 ACDGA/HCP4A Bearing is designed with a 25° contact angle, ideal for handling combined radial and axial loads.
Its chrome steel rings and ceramic balls ensure smooth operation at high speeds up to 75,000 rpm.

The phenolic cage in 71904 ACDGA/HCP4A Bearing reduces friction and wear, enhancing longevity.
With a dynamic radial load capacity of 1287 lbf, it performs reliably in precision applications.

71904 ACDGA/HCP4A Bearing operates efficiently within a temperature range of -30°C to 110°C.
Its extra light preload (Class A) ensures minimal vibration and noise during use.

The open design of 71904 ACDGA/HCP4A Bearing allows for easy lubrication and maintenance.
Its P4A tolerance class guarantees high precision and consistent performance.

Application

Key Fields for 71904 ACDGA/HCP4A Bearing
71904 ACDGA/HCP4A Bearing is commonly used in high-speed machine tools, where its ceramic balls and phenolic cage reduce friction and heat buildup. The extra light preload ensures smooth operation in precision grinding applications.

In robotics, 71904 ACDGA/HCP4A Bearing supports articulated arms, providing stability during rapid movements. Its angular contact design handles combined radial and axial loads effectively.

For optical equipment like lens positioning systems, 71904 ACDGA/HCP4A Bearing’s P4A tolerance class guarantees minimal vibration. The chrome steel rings offer durability in sensitive environments.

Automotive testing rigs benefit from 71904 ACDGA/HCP4A Bearing’s high-speed capability, ensuring accurate data collection under dynamic conditions. The lubricated design extends service life.

In dental handpieces, 71904 ACDGA/HCP4A Bearing’s compact size and ceramic components provide quiet, reliable performance. The temperature range suits frequent sterilisation cycles.

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