71911 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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71911 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The 71911 ACE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This metric bearing features a duplex tandem (DT) arrangement, where two bearings are preloaded and matched to work as a single unit. This configuration provides superior axial rigidity and is optimized to handle high thrust loads in one direction. Manufactured to the exacting P4A tolerance class and equipped with a phenolic cage and ceramic balls, it delivers outstanding high-speed capabilities, extended service life, and reliable operation in precision machinery.
71911 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD). |
| ACE | Specific internal design, contact angle of 25°, and enhanced precision. |
| HC | Hybrid Ceramic: Indicates the use of ceramic balls for reduced friction and higher speed. |
| P4A | The tolerance class, denoting very high running accuracy and dimensional precision. |
| ADT | Duplex Tandem Arrangement: Two bearings are mounted in tandem to increase axial load capacity. |
71911 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
- Duplex Tandem (DT) Arrangement: The two preloaded bearings in tandem significantly increase the axial load rating and rigidity in the primary thrust direction, making it ideal for applications with heavy unidirectional axial loads.
- Hybrid Ceramic Construction: The combination of steel rings and ceramic balls reduces centrifugal forces, lowers operating temperature, and enables a higher limiting speed (46,000 rpm). It also offers superior resistance to wear and electrical erosion.
- Phenolic Resin Cage: This lightweight and robust cage material contributes to smooth operation at high speeds, excellent dimensional stability, and resistance to centrifugal forces.
- P4A Super-Precision: Adherence to the P4A tolerance class ensures minimal runout and vibration, which is critical for achieving high rotational accuracy in precision spindles.
- Preload & Matched Set: Supplied as a preloaded, matched pair, ensuring optimal performance and eliminating the need for complex adjustment during installation.
71911 ACE/HCP4ADT Bearing Typical Application Areas
This high-precision, high-speed bearing is engineered for advanced machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors and Electric Spindles.
- Aerospace & Defense Gyroscopes and navigation systems.
- Medical Equipment such as high-speed dental handpieces.
