7219 CD/P4ADGA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7219 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7219 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing excels in high-speed operations while providing superior support for combined loads (radial and axial). Its universal matchable (SU) design allows for flexible mounting arrangements in pairs, offering engineers versatile solutions for complex spindle and shaft designs. The combination of a phenolic cage and optimized 15° contact angle ensures smooth operation at limiting speeds up to 15,000 rpm, making it ideal for high-performance machinery.
7219 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing designation (95mm bore, 170mm OD, 64mm width) |
| CD | Contact angle of 15° and universal matchable design |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DGA | Preloaded pair (2 bearings) with extra light preload |
7219 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides superior stiffness and can handle significant combined radial and axial loads simultaneously. With a dynamic load rating of 50,625 lbf and static load rating of 54,000 lbf, this bearing offers reliable performance under demanding conditions.
High-Speed Performance: The phenolic resin cage ensures excellent dimensional stability and reduced friction at high speeds, enabling operation up to 15,000 rpm. The optimized 15° contact angle provides balanced load distribution for smooth high-speed rotation.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing guarantees minimal runout and vibration, essential for precision applications.
Material Excellence: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and long service life under demanding operating conditions.
7219 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machines
- High-Speed Motors: Industrial motors and generators requiring precision and speed
- Precision Instruments: Measuring equipment, optical instruments, and laboratory apparatus
- Aerospace Components: Aircraft auxiliary systems and precision mechanisms
- Robotics & Automation: High-accuracy robotic joints and precision positioning systems
