71911 FE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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71911 FE/HCP4ADT Bearing Product Overview & Core Advantages
The 71911 FE/HCP4ADT is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. This duplex tandem (DT) matched set is designed to handle primarily axial loads in one direction with exceptional rigidity and accuracy. Its core advantages include an extremely high limiting speed of 34,000 rpm, enabled by a lightweight phenolic cage and ceramic balls, and the ability to accommodate heavy axial loads due to its tandem arrangement and P4A tolerance class. This configuration offers a compact, preloaded solution for spindles requiring maximum stiffness and rotational precision.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Bearing series and size designation (55mm bore, 80mm OD, 26mm width). |
| FE | Designates a duplex bearing set with a specific preload. |
| HC | Indicates the use of hybrid ceramic balls (Silicon Nitride). |
| P4A | Specifies the tolerance class, denoting very high running accuracy and dimensional stability. |
| DT | Signifies the Duplex Tandem arrangement, where two bearings are matched to increase axial load capacity in one direction. |
71911 FE/HCP4ADT Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at high speeds.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing directly to the bearing's high limiting speed and smooth operation.
- Duplex Tandem (DT) Arrangement: This preloaded matched set provides maximum axial rigidity and load-carrying capacity for applications with dominant thrust loads in a single direction.
- Super-Precision P4A Tolerances: Ensures minimal runout and precise rotational accuracy, which is critical for applications like machine tool spindles to achieve superior surface finishes.
- Optimized Contact Angle (18°): This design provides an ideal balance between radial load capacity and high axial load capacity.
71911 FE/HCP4ADT Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications requiring extreme speed, rigidity, and accuracy, including:
- High-Speed Machine Tool Spindles (e.g., milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Turbochargers
- High-Performance Dental Handpieces
