71912 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71912 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71912 ACD/HCP4ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a universally matchable (SU) bearing supplied in a pre-lubricated set of two, it is designed to accommodate combined loads (radial and axial) simultaneously. Its core advantages stem from a P4A super-precision tolerance class, a ceramic ball construction, and an extra light preload (Class A), making it ideal for high-speed operation and high-rigidity systems where minimal deflection is critical.
71912 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a double row design for increased load capacity and rigidity. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DGA | Specifies a universal matchable (SU) arrangement. Two bearings are supplied as a pre-set, pre-lubricated matched pair. |
71912 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row angular contact design provides superior stiffness and enables the bearing to handle significant combined radial and axial loads from both directions.
Enhanced High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic resin cage allows for a very high limiting speed of 33,000 rpm. This setup minimizes friction and heat generation.
Precision and Stability: Manufactured to P4A tolerance class and with an extra light preload, this bearing ensures minimal runout and precise shaft positioning, critical for applications with stringent accuracy requirements.
Universal Matchability (SU): The DGA suffix indicates the two bearings are universally matchable. They can be mounted in any combination (back-to-back, face-to-face, or tandem) to create a pre-adjusted set, simplifying installation and optimizing system performance.
71912 ACD/HCP4ADGA Bearing Typical Application Areas
This high-performance bearing is ideally suited for advanced machinery and systems, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace and Defense Actuators
- Semiconductor Manufacturing Equipment
