71928 ACD/P4ADT
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
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71928 ACD/P4ADT Bearing Product Overview & Core Advantages
The 71928 ACD/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex tandem (DT) arrangement consists of two matched bearings preloaded against each other, delivering superior stiffness and enabling it to handle significant combined loads—high radial loads and unidirectional thrust loads simultaneously. Manufactured to P4A tolerance class, it offers extremely tight dimensional and running accuracy, making it ideal for high-speed, high-precision spindles and machinery where positional accuracy is critical.
71928 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex arrangement | Optimized for handling combined radial and axial loads in a preloaded configuration |
| P4A | High Precision Tolerance Class | Superior running accuracy and dimensional stability for precision applications |
| DT | Duplex Tandem | Increased axial load capacity and rigidity through matched bearing pairs |
71928 ACD/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement and 25° contact angle create an exceptionally rigid bearing system capable of withstanding heavy combined loads. This configuration significantly enhances system stability under complex loading conditions.
Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing ensures minimal runout and superior rotational accuracy for high-speed applications.
Optimized High-Speed Operation: The phenolic cage material provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at the limiting speed of 11,000 rpm. The 29 chrome steel balls with 15.875mm diameter are precision graded for consistent performance.
Enhanced Durability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue resistance and long service life in demanding operating conditions within the temperature range of -30°C to 110°C.
71928 ACD/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring extreme accuracy and rigidity
- High-Speed Machining Centers: Applications demanding both high rotational speeds and precise positioning
- Precision Gearboxes: Industrial transmission systems where minimal deflection and high load capacity are critical
- Aerospace Components: Flight control systems and auxiliary power units requiring reliable performance under combined loads
- Medical Equipment: High-speed dental handpieces and surgical drill systems
