7019 ACDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7019 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7019 ACDGA/P4A is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to primarily accommodate combined loads (radial and axial loads in one direction), it features an extra light preload (Class A) for minimal running torque and high positional accuracy. Manufactured to the stringent P4A tolerance class, this bearing is ideal for machine tool spindles and other high-speed, high-rigidity systems where precision is paramount.
7019 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 | Standard bearing series number, indicating a 95mm bore and 145mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| DGA | Universal Matchable (SU) bearing. Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to accommodate axial loads in either direction or increase rigidity. |
| P4A | Indicates a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for applications demanding extreme running accuracy and high-speed performance. |
7019 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The phenolic cage ensures stable operation at high speeds with low friction and excellent dimensional stability. Combined with the extra light preload, this design minimizes deflection under load, providing superior system stiffness and accuracy.
Superior Load Capacity: The 25° contact angle and high-grade chrome steel construction enable the bearing to handle significant combined radial and axial loads efficiently.
Optimized for High-Speed Operation: The lightweight phenolic cage and precision-ground raceways contribute to a high limiting speed of 15,000 rpm, making it suitable for demanding high-speed spindle applications.
Universal Matching Capability: The DGA suffix signifies that the bearing is universally matchable. This allows for simplified mounting of pre-adjusted bearing pairs (DB or DF), reducing assembly time and ensuring optimal preload for maximum performance.
7019 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments.
