7019 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7019 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7019 ACDGB/P4A is a single row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and rigidity. Operating under a P4A tolerance class and a 25° contact angle, this bearing is optimized to handle significant combined loads—high radial loads and unidirectional axial loads—simultaneously. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, such as back-to-back (DB) or face-to-face (DF) arrangements, enabling engineers to fine-tune system stiffness. With a light preload (Class B) and a phenolic resin cage, it delivers superior high-speed performance, making it an ideal component for precision spindles and other critical machinery.
7019 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7019 | Basic bearing designation: 95mm bore, 145mm OD, 24mm width. | Defines the core bearing dimensions. |
| AC | Angular Contact design with a 25° contact angle. | Optimized for handling combined radial and axial loads. |
| DGB | Universal Matchable bearing (SU designation). | Enables flexible mounting in pairs or sets to achieve desired preload and system rigidity. |
| P4A | High-Precision Tolerance Class. | Guarantees extremely tight dimensional and running accuracy for precision applications. |
7019 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction using chrome steel rings and balls provide high resistance to deformation under combined loads (Radial dynamic: 17,122 lbf, Static: 17,212 lbf).
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and ensures stable operation at high rotational speeds (limiting speed: 15,000 rpm).
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, ensuring minimal runout and superior positional accuracy in the assembly.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it can be supplied in pre-matched sets (e.g., sets of 3) to deliver predictable and consistent preload, simplifying installation and enhancing spindle performance.
7019 ACDGB/P4A Bearing Typical Application Areas
The 7019 ACDGB/P4A is specified in high-performance machinery where precision and speed are critical. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Robotics and automated manufacturing systems.
- High-Frequency Motors and Spindles: PCB drilling and semiconductor manufacturing equipment.
- Medical and Laboratory Equipment: Centrifuges and high-speed scanners.
