7012 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7012 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7012 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Extra Light (Class A) specifications, providing superior system stiffness and minimizing axial and radial runout. Engineered to a P4A tolerance class, it is ideal for high-precision, high-speed spindles where controlling deflection under combined loads is critical. Its compact design and pre-matched set ensure simplified installation and reliable performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series and size designation (60mm bore, 95mm OD, 36mm width). |
| C | 15° contact angle, optimized for carrying combined radial and axial loads. |
| D | Duplex Back-to-Back (DB) arrangement. This configuration provides high moment rigidity. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards, for applications requiring minimal runout. |
| DB | Specifies the universal matching grade for the matched set of two bearings. |
| A | Indicates the Extra Light preload (Class A) applied to the matched set. |
7012 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex back-to-back (DB) arrangement and Class A preload create a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise positioning and dimensional stability during operation.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 14,918 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously, making it suitable for demanding applications.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the open design and factory-applied lubrication contribute to lower operating temperatures, supporting a high limiting speed of 34,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight bore, outer diameter, and width tolerances, this bearing guarantees minimal runout and vibration for exceptional rotational accuracy.
7012 CD/P4ADBA 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: Where low vibration and high rigidity are paramount.
- Medical & Dental Equipment: High-speed handpieces and scanners.
- Aerospace & Defense Systems: Gyroscopes, radar, and other precision instrumentation.
