S7012 CB/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7012 CB/P4ADBB Bearing Product Overview & Core Advantages
The S7012 CB/P4ADBB is a precision duplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and running accuracy. This P4A tolerance class bearing is preloaded and matched as a set, delivering superior performance under combined loads (radial and axial). Its compact design, featuring two single-row bearings in a DB arrangement, provides high system stiffness and is ideal for high-speed, high-precision machinery where rotational accuracy is paramount.
S7012 CB/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| S7012 | Basic bearing series and size designation. |
| CB | Indicates a duplex pair in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity. |
| P4A | Specifies the tolerance class, denoting very high precision levels for both dimension and running accuracy. |
| DBB | Further clarifies the specific preload and matching grade within the duplex back-to-back set (Light preload / Class B). |
S7012 CB/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & System Stiffness: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional high rigidity for the spindle or shaft.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. The 15° contact angle is optimized for supporting substantial axial loads in both directions.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and low friction, contributing to the high limiting speed of 31,000 rpm. The grease lubrication is suitable for this high-speed range.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and precise rotational characteristics, which is critical for applications like machine tool spindles.
- Sealed & Pre-Lubricated: As a sealed bearing, it is protected from contamination and comes pre-lubricated with grease, simplifying installation and ensuring immediate operation.
S7012 CB/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring high speed, high rigidity, and exceptional accuracy, such as:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Spindle Motors
- Precision Grinding Spindles
- High-performance Robotic Drives
- Other precision rotary equipment in aerospace and medical industries
