S7019 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7019 CDGA/P4A Bearing Product Overview & Core Advantages
The S7019 CDGA/P4A is a high-precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Its primary advantage lies in its ability to simultaneously support substantial combined loads (radial and bidirectional axial loads) due to its optimized contact angle and double row design. Manufactured to the stringent P4A tolerance class, this bearing ensures minimal runout and superior rotational accuracy. The combination of a phenolic cage and pre-lubrication facilitates high-speed operation, making it an ideal, compact solution for high-performance spindles and precision machinery where reliability is critical.
S7019 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7019: Basic bearing series designation, indicating a double row angular contact ball bearing with a 95mm bore.
- CDGA: A suffix group specifying internal design and preload.
- C: Specific internal geometry for optimized performance.
- DG: Universal Matchable (SU) designation, indicating the bearing is supplied as part of a universally matchable set.
- A: Denotes an Extra light (Class A) preload, minimizing friction and heat generation for high-speed applications.
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy tolerances superior to ABEC 7/ISO P4.
S7019 CDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design provides a significantly wider effective spread than a single row bearing, resulting in superior moment stiffness and the ability to handle heavy combined loads.
Precision High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low centrifugal forces, contributing to a high limiting speed. The 15-degree contact angle is optimized for high-speed operation with moderate axial loads.
Universal Matching and Simplified Mounting: Supplied as part of a universally matchable set of 4 bearings, these bearings can be arranged in various configurations (back-to-back, face-to-face, or tandem) without the need for selective mounting, simplifying installation and ensuring optimal preload.
Sealed and Pre-Lubricated: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S7019 CDGA/P4A Bearing Typical Application Areas
The S7019 CDGA/P4A is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors
