71913 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71913 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71913 ACD/P4ADBA is a high-precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This matched back-to-back arrangement (DB) provides superior stability when handling combined radial and axial loads. Manufactured to P4A tolerance class with an extra light preload (Class A), it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery where uncompromising performance is critical.
71913 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation (65mm bore, 90mm OD, 26mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | Duplex arrangement (two bearings supplied as a matched set) |
| P4A | High precision tolerance class (exceeding ABEC 7 standards) |
| DB | Back-to-Back mounting configuration for high rigidity |
71913 ACD/P4ADBA Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly increasing system stiffness and moment load capacity. This configuration is essential for applications requiring high positional accuracy.
Superior Load Capacity: With a 25° contact angle and 26 high-grade chrome steel balls, this bearing is optimized to handle significant combined radial and axial loads from both directions simultaneously.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 36,000 rpm. The open design facilitates efficient lubrication management.
Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width, ensuring precise fit and minimal runout in the most demanding applications.
71913 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is specifically engineered for applications where maximum rigidity and rotational accuracy are paramount:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial robotics and automation systems
- High-Frequency Motors - Spindle motors and high-performance servomotors
- Aerospace Components - Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment - Dental handpieces and laboratory instrumentation
