7219 CD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7219 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7219 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 provides superior stability under combined loads, efficiently handling radial forces and axial loads in both directions. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and high positional accuracy. Its extra light preload (Class A) minimizes friction and heat generation, making it an ideal choice for high-precision spindles and other high-rigidity applications.
7219 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing series, indicating a 95 mm bore, 170 mm OD, and 64 mm width. |
| C | 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Duplex (two single-row bearings). |
| DB | Back-to-Back arrangement. This configuration provides high moment rigidity and is excellent for withstanding overturning moments. |
| P4A | Precision tolerance class exceeding ABEC 7 (ISO P4), with enhanced running accuracy specifications. |
| A | Specifies Extra Light Preload (Class A), which reduces friction and operating temperature for high-speed applications. |
7219 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a wide, stable support system that significantly increases moment load capacity and system rigidity. This allows the bearing set to handle combined radial and axial loads simultaneously with minimal deflection.
Precision & High-Speed Performance: Built to P4A tolerance class with a phenolic cage, this bearing ensures smooth operation and reduced vibration at high speeds. The 15° contact angle and light preload are optimized for a limiting speed of 15,000 rpm, making it suitable for demanding spindle applications.
Material & Construction: Components are manufactured from high-grade chrome steel, providing excellent wear resistance and durability. The open design allows for customized lubrication schemes to match specific operational requirements.
7219 CD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems requiring high accuracy.
- High-Frequency Motors & Spindles: Applications where minimal runout and thermal stability are critical.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
