7012 CE/HCPA9ADBA
Hybrid Ceramic Super Precision Bearings
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7012 CE/HCPA9ADBA Bearing Product Overview & Core Advantages
The 7012 CE/HCPA9ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and high-speed performance. This matched back-to-back (DB) arrangement is preloaded to Extra Light / Class A specifications, ensuring high running accuracy and minimal axial and radial play. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with superior stability, making it ideal for high-precision, high-reliability machinery. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life.
7012 CE/HCPA9ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 7012: Basic designation indicating a 60 mm bore, 95 mm OD, and 36 mm width.
- C: Denotes a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- E: Signifies a high-capacity internal design with an increased number of larger balls.
- /: Separator indicating a special feature set follows.
- HC: Stands for Hybrid Ceramic, specifying the use of ceramic balls in a steel ring structure.
- PA9A: Indicates a high-precision tolerance class (PA9A), with extremely tight bore, OD, and width tolerances for superior running accuracy.
- DB: Specifies the bearings are supplied as a Duplex Back-to-Back matched set.
- A: Denotes the specific preload level – Extra Light (Class A).
7012 CE/HCPA9ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread, providing exceptional resistance to moment loads and ensuring high system rigidity and operational stability.
Enhanced Load Capacity: The high-capacity (E) design and 25 ceramic balls significantly increase the dynamic and static load ratings, enabling reliable performance under demanding combined radial and axial loads.
Superior High-Speed Performance: The combination of low-density ceramic balls, a lightweight phenolic resin cage, and a 15° contact angle minimizes centrifugal forces and friction, allowing for a very high limiting speed of 34,000 rpm.
Precision & Accuracy: Manufactured to PA9A tolerance class with a Class A preload, this bearing set guarantees minimal runout and precise shaft positioning, which is critical for high-precision applications.
7012 CE/HCPA9ADBA Bearing Typical Application Areas
This high-performance bearing set is ideally suited for advanced machinery where precision, speed, and rigidity are paramount. Key application areas include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Arms
- Advanced Medical Equipment (e.g., Dental handpieces, Imaging systems)
- Aerospace Actuation Systems
