71913 ACE/HCPA9AH1DBA
Hybrid Ceramic Super Precision Bearings
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71913 ACE/HCPA9AH1DBA Bearing Product Overview & Core Advantages
The 71913 ACE/HCPA9AH1DBA is a **precision angular contact ball bearing** designed for **high-speed applications** requiring exceptional rigidity and accuracy. This **duplex back-to-back (DB) matched set** consists of two bearings pre-loaded to **extra light (Class A)** specifications, delivering superior **rotational accuracy** and system stability. Engineered with **ceramic balls** and a **phenolic cage**, it offers reduced friction, lower operating temperatures, and extended service life in demanding conditions. Its **25° contact angle** provides optimal performance for combined **radial and axial loads**, making it ideal for high-precision machinery.
71913 ACE/HCPA9AH1DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation (65mm bore, 90mm OD, 26mm width) |
| ACE | **Angular contact** design with **25° contact angle** |
| HC | **Hybrid ceramic** balls for enhanced performance |
| PA9A | **High precision tolerance class** (PA9A) for exceptional running accuracy |
| H1 | **Phenolic cage** material for high-speed capability |
| DB | **Duplex back-to-back** mounting arrangement |
71913 ACE/HCPA9AH1DBA Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The **duplex back-to-back configuration** creates a rigid bearing system that effectively resists moment loads and maintains shaft alignment under **combined loading** conditions.
Superior Speed Performance: The combination of **ceramic balls** and **phenolic cage** reduces centrifugal forces and friction, enabling operation at **limiting speeds up to 36,000 rpm** while maintaining thermal stability.
Optimized Load Capacity: With a **25° contact angle**, this bearing efficiently handles **combined radial and axial loads**, featuring a **dynamic load rating of 5,738 lbf** and **static load rating of 5,220 lbf**.
Precision Engineering: Manufactured to **PA9A tolerance class** with tight dimensional controls (**bore tolerance: -0.004mm to 0**), ensuring consistent high-precision performance in critical applications.
Temperature Resilience: The hybrid construction and phenolic cage allow reliable operation across a **wide temperature range from -30°C to 110°C**.
71913 ACE/HCPA9AH1DBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- Precision Instrumentation: Measuring equipment and laboratory instruments requiring exceptional accuracy
- High-Speed Motors: Servo motors and spindle drives in industrial automation
- Aerospace Systems: Guidance systems and auxiliary power units
- Medical Equipment: Dental handpieces and surgical tool drives
