71910 ACE/HCP4ALDBA
Hybrid Ceramic Super Precision Bearings
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71910 ACE/HCP4ALDBA Bearing Product Overview & Core Advantages
The 71910 ACE/HCP4ALDBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined loads, including significant radial and bidirectional axial loads. Manufactured to P4A tolerance class and featuring a phenolic cage with ceramic balls, it is engineered for high-speed operation and extended service life in precision machinery.
71910 ACE/HCP4ALDBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD). |
| ACE | 25° contact angle, phenolic cage, and high-precision grade. |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Ultra-precision tolerance class, tighter than ABEC 7. |
| DB | Duplex Back-to-Back mounting arrangement. |
71910 ACE/HCP4ALDBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide effective spread of the load-carrying contact angles, significantly increasing system rigidity and moment load capacity, which is critical for maintaining precision under heavy combined loads.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls (Si3N4) reduces centrifugal forces and inertial mass, enabling a high limiting speed of 46,000 rpm. This also minimizes heat generation and wear.
Extended Service Life & Reliability: Hybrid ceramic construction offers excellent resistance to wear and provides electrical insulation. The P4A precision tolerance ensures minimal runout and vibration, leading to smoother operation and longer life in precision applications.
Preload & Accuracy: Supplied with an extra light (Class A) preload, this bearing is optimized for applications requiring minimal friction and high positional accuracy without the need for on-site adjustment.
71910 ACE/HCP4ALDBA Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles for milling, grinding, and drilling
- Precision Robotic Arms and joints
- High-Speed Centrifuges and compressors
- Aerospace & Defense instrumentation and control systems
- Medical Equipment such as dental handpieces and surgical tools
