7019 CDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7019 CDGA/P4A Bearing Product Overview & Core Advantages
The 7019 CDGA/P4A is a single row angular contact ball bearing designed for applications demanding exceptional precision and high-speed operation. Manufactured to the stringent P4A tolerance class, this bearing delivers superior running accuracy. Its defining feature is the Universal Matchable (SU) designation, allowing it to be preloaded in sets to achieve extremely high system rigidity. The combination of a phenolic cage and a 15° contact angle enables high rotational speeds while effectively supporting combined loads, making it an ideal choice for high-performance spindles and precision machinery.
7019 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 | Basic bearing series, indicating a 95 mm bore and 145 mm outside diameter. |
| C | Designates a 15° contact angle. |
| DG | Indicates the bearing is Universal Matchable (SU) and supplied in a set. |
| A | Signifies an Extra light preload (Class A). |
| P4A | Denotes a high precision tolerance class with enhanced running accuracy requirements. |
7019 CDGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 15,000 rpm. This makes the bearing suitable for demanding high-speed applications.
Superior Rigidity and Load Capacity: As a Universal Matchable (SU) bearing, multiple units can be mounted together to create a preloaded set. This configuration significantly increases system rigidity and enables the bearing arrangement to handle substantial combined loads (radial and axial). The 15° contact angle is optimized for high-speed performance while maintaining good axial load capacity.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional control on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-smooth operation in precision machinery.
7019 CDGA/P4A Bearing Typical Application Areas
The 7019 CDGA/P4A is engineered for high-performance applications where speed, precision, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling and high-frequency motor spindles.
- Robotics: High-accuracy joints and arm assemblies.
- Aerospace and Defense: Gyroscopes, radar systems, and other sensitive instrumentation.
