7214 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7214 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7214 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched back-to-back arrangement (DB) provides superior stability and is preloaded to Moderate / Class C specifications, ensuring minimal axial and radial play under operating conditions. Its primary advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads simultaneously—making it ideal for high-precision, high-rigidity systems. Manufactured to P4A tolerance class, it guarantees exceptional running accuracy and consistent performance in demanding environments.
7214 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7214 | Basic bearing series, indicating a 70 mm bore, 125 mm OD, and 48 mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex (two bearings supplied as a set). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards, for exceptional running accuracy. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity and stability. |
| C | Moderate preload level, optimized for rigidity and speed performance. |
7214 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision in machine tools and spindles.
Superior Load Capacity: With a 25° contact angle and duplex design, this bearing excels at handling combined radial and axial loads from both directions. The dynamic load rating of 24,300 lbf and static rating of 24,750 lbf ensure long service life under heavy loads.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and strong, reducing centrifugal forces and allowing for a high limiting speed of 28,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing delivers exceptional running accuracy and low vibration levels.
7214 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Gearboxes: Applications where low noise, high speed, and accurate shaft positioning are critical.
- High-Frequency Spindles: PCB drilling, engraving, and other high-RPM machining applications.
- Industrial Pumps & Compressors: For shafts subjected to significant combined loads.
- Robotic Arm Joints & Precision Rotary Axes: Where high moment stiffness and accuracy are paramount.
