71919 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71919 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71919 ACDGB/P4A is a single row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under a P4A tolerance class and a light preload (Class B), this bearing is designed to handle significant axial loads in one direction and moderate radial loads simultaneously. Its optimized 25° contact angle and universal matching (SU) capability allow for flexible mounting arrangements in high-speed spindles and precision machinery, delivering reliable performance and extended service life in demanding operational environments.
71919 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 71919: Basic bearing series and size designation (95mm bore, 130mm OD, 18mm width)
- AC: Angular Contact design with a 25° contact angle
- D: High internal design with optimized ball complement and raceway geometry
- GB: Combined designation for light preload (Class B) and universal matching capability
- P4A: Ultra-precision tolerance class exceeding ABEC 7 standards
71919 ACDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring minimal runout and vibration for high-speed applications up to 16,000 rpm.
Optimized Load Capacity: The 25° contact angle and phenolic cage design enable superior axial load carrying capacity while maintaining excellent radial load performance (dynamic: 10,395 lbf, static: 11,700 lbf).
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, contributing to the bearing's limiting speed capabilities while maintaining dimensional stability across the operating temperature range (-30°C to 110°C).
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, multiple units can be precisely matched in sets of three to create pre-loaded arrangements without selective assembly, simplifying installation and ensuring optimal performance.
71919 ACDGB/P4A Bearing Typical Application Areas
The 71919 ACDGB/P4A finds extensive use in precision applications requiring high rotational accuracy and speed capabilities:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial transmission systems requiring minimal backlash
- High-Frequency Motors: Spindle motors and high-RPM electric motors
- Medical Equipment: Dental handpieces, laboratory centrifuges, and imaging systems
- Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units
