S7012 ACD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7012 ACD/P4ADBB Bearing Product Overview & Core Advantages
The S7012 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This matched pair features a back-to-back (DB) arrangement and is manufactured to P4A tolerance class, ensuring superior running accuracy. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously from both directions, making it ideal for high-precision spindles and other demanding machinery where high rigidity and operational reliability are paramount.
S7012 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7012 | Basic bearing series and size designation (60mm bore, 95mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings as a set). |
| P4A | High precision tolerance class for exceptional dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity. |
| B | Light preload (Class B) for optimal stiffness and minimal deflection under load. |
S7012 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing set's resistance to moment loads and providing high rigidity. This configuration, combined with the 25° contact angle, enables the bearing to efficiently handle significant combined radial and axial loads from both directions.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing ensures smooth operation, low vibration, and noise levels. The lightweight cage and optimized internal geometry contribute to its high limiting speed of 32,500 rpm, making it a true high-speed bearing.
Sealed & Pre-Lubricated: The bearing is sealed and pre-lubricated with grease, offering protection against contamination and providing long-term, maintenance-free operation within its specified temperature range of -30°C to 110°C.
S7012 ACD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors & Spindles: Applications demanding minimal runout and high rotational accuracy.
- Medical Equipment: High-speed dental handpieces and imaging scanners.
- Industrial Pumps & Compressors: For reliable performance under combined loads.
