719/8AC
Miniature Angular Contact Ball Bearings
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Part No.
Part No.
719/8AC
Basic Information
System of measurement
Metric
Weight
0.0073 kg
ABEC rating
P5(ABEC-5),P4(ABEC-19)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
8 mm
Outside diameter
19 mm
Width
6 mm
Contact angle
25 °
Performance
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Preload
Available
Materials
Ball material
Steel,Ceramic
Cage material
Nylon,Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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719/8AC Bearing Product Overview & Core Advantages
The 719/8AC is a precision miniature angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered with a 25° contact angle, this bearing excels at supporting combined loads—simultaneously handling substantial axial loads in one direction alongside radial loads. Its compact design, featuring an 8 mm bore and 19 mm outer diameter, makes it ideal for space-constrained, high-speed applications requiring superior running accuracy and dimensional stability. Available in various configurations including sealed, open, and with different preload options, it offers versatile solutions for critical mechanical systems.
719/8AC Bearing Model Code Explained, Specifications & Naming Convention
The model number 719/8AC can be broken down as follows:
Common suffixes and their technical meanings for this series include:
- 719: Series designation for miniature, high-precision angular contact ball bearings.
- 8: Bore diameter in millimeters (8 mm).
- AC: Angular Contact design, indicating its capability to handle combined loads.
Common suffixes and their technical meanings for this series include:
- A: 30° contact angle (Note: This specific 719/8AC variant uses a 25° angle).
- P5 / P4: ABEC-5 / ABEC-19 precision classes, denoting very high and ultra-high levels of running accuracy respectively.
- Seal/Shield Types: Sealed or Open variants available for different contamination and lubrication needs.
- Cage Types: Nylon or Phenolic cages, contributing to low friction and high-speed capability.
- Preload: Availability of preload ensures minimal axial and radial play, enhancing system rigidity.
719/8AC Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to ABEC-5 (P5) or ABEC-19 (P4) tolerance classes, this bearing ensures exceptional dimensional accuracy and run-out control. The single-row design, when used in properly preloaded pairs (Universal Matchable - SU), creates a highly rigid bearing system that minimizes deflection under load.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant one-direction axial loads in addition to radial loads, making it suitable for applications with demanding combined load conditions.
- High-Speed Performance: The use of lightweight Nylon or Phenolic cages reduces centrifugal forces, enabling smoother operation at very high rotational speeds. Optional ceramic balls further enhance speed capability and service life.
- Versatile Configuration: The availability of sealed versions protects against contamination and retains lubrication, while open versions allow for custom lubrication schemes. The Universal Matchable (SU) designation means bearings can be universally paired for simplified mounting and optimal preload.
719/8AC Bearing Typical Application Areas
The 719/8AC miniature precision bearing is ideally suited for:
- High-Speed Spindles in PCB drilling machines, dental handpieces, and small machining centers.
- Precision Instrumentation including optical encoders, gyroscopes, and medical devices.
- Robotics joints and actuators requiring compact size, high rigidity, and accurate motion control.
- Office Automation Equipment such as high-speed scanners and precision printers.
