7213 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7213 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7213 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back (DB) matched arrangement and a P4A tolerance class, making it ideal for machine tool spindles and other high-precision machinery. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, thanks to the optimized 25° contact angle and preloaded duplex configuration. The open design, combined with phenolic cage and factory lubrication, ensures reliable performance in high-speed operations.
7213 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series with 65mm bore, 120mm OD, 46mm width |
| AC | Angular Contact design with 25° contact angle |
| D | Duplex arrangement (two bearings matched) |
| P4A | High precision tolerance class (superior to ABEC-7) |
| DB | Back-to-Back mounting arrangement |
7213 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back configuration provides exceptional stiffness against moment loads and shaft deflection, crucial for maintaining precision in machining operations.
Enhanced Load Capacity: With a radial dynamic load rating of 23,400 lbf and static load rating of 22,950 lbf, this bearing effectively handles combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The phenolic resin cage ensures smooth operation at limiting speeds up to 36,000 rpm, while the 15.875mm chrome steel balls and precision grinding contribute to balanced rotation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing guarantees consistent performance in precision applications.
Moderate Preload (Class C): Factory-set preload eliminates internal clearance, providing immediate stiffness and reducing vibration during operation.
7213 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Industrial Pumps: Chemical process pumps, high-pressure circulation systems
- High-Speed Compressors: Air compressors and gas handling equipment
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- Robotics & Automation: High-precision robotic arms and automated positioning systems
