71930 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Product Overview and Core Advantages
The 71930 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched back-to-back arrangement provides superior stability under combined loads, effectively handling radial forces and bidirectional axial thrust. Manufactured to P4A tolerance class, it delivers high running accuracy and is pre-lubricated for immediate use, making it ideal for high-speed, high-precision machinery where reliability is critical.
71930 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71930: Basic bearing series, indicating a light series angular contact bearing with 150mm bore diameter
- AC: Angular Contact design with a 25° contact angle
- D: Duplex arrangement
- DB: Back-to-Back mounting configuration
- P4A: High precision tolerance class exceeding ABEC 7 standards
- A: Extra light preload classification
Structural Features and Performance Benefits
High Rigidity Design: The duplex back-to-back configuration creates a rigid bearing system that minimizes deflection under moment loads, providing exceptional stability for precision applications.
Superior Load Capacity: With a dynamic load rating of 40,050 lbf and static load rating of 56,250 lbf, this bearing efficiently handles combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The phenolic resin cage reduces friction and weight, while the precision-ground chrome steel balls (19.05mm diameter, 23 count) ensure smooth operation at limiting speeds up to 11,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring consistent performance in demanding applications.
71930 ACD/P4ADBA Bearing Typical Application Areas
The 71930 ACD/P4ADBA excels in precision applications including:
- Machine Tool Spindles - High-speed milling and grinding spindles requiring extreme accuracy
- Precision Gearboxes - Industrial transmission systems demanding high rigidity
- High-Speed Motors - Electric motors and spindle drives operating at elevated speeds
- Aerospace Components - Flight control systems and auxiliary power units
- Medical Equipment - CT scanners and high-speed dental handpieces
- Robotics - Precision robotic arms and automation equipment
