7040 CDGA/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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7040 CDGA/P4A Bearing Product Overview & Core Advantages
The 7040 CDGA/P4A is a single-row angular contact ball bearing engineered for ultra-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class with an Extra Light (Class A) preload, this bearing delivers superior running precision and minimal deflection under load. Its 15° contact angle is optimized for handling combined loads, particularly substantial axial loads in one direction, while maintaining high-speed capability up to 16,250 rpm. The Universal Matchable (SU) designation allows for precise axial preload control when mounted in pairs, making it an ideal solution for high-rigidity spindle systems.
7040 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7040 | Standard bearing series designation | Defines basic dimensions: 200mm bore, 310mm OD, 51mm width |
| C | 15° contact angle design | Optimized for combined radial and axial load capacity |
| DG | Universal matchable bearing pair | Enables precise preload adjustment in duplex arrangements |
| A | Extra light preload (Class A) | Minimizes friction and heat generation for high-speed operation |
| P4A | High precision tolerance class | Ensures exceptional dimensional and running accuracy for precision applications |
7040 CDGA/P4A Bearing Structural Features & Performance Benefits
Premium Material Construction: Manufactured from chrome steel for both rings and balls, providing excellent wear resistance and fatigue life. The phenolic resin cage offers superior strength-to-weight ratio and smooth operation at high speeds.
High Precision & Rigidity: The P4A tolerance class ensures minimal dimensional variation, while the Extra Light preload eliminates internal clearance for immediate response and minimal deflection under load. This combination delivers exceptional rotational accuracy and system stiffness.
Optimized Load Capacity: With a 15° contact angle design, this bearing efficiently handles combined radial and axial loads. The dynamic radial load rating of 66,600 lbf and static radial load rating of 87,750 lbf ensure reliable performance in demanding applications.
High-Speed Performance: The lightweight phenolic cage and precision-ground components enable operation at limiting speeds up to 16,250 rpm. The open design facilitates efficient lubrication management for thermal stability during high-speed operation.
7040 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring exceptional rigidity and accuracy
- Precision Gearboxes: Industrial transmission systems demanding high rotational precision and load capacity
- High-Speed Machining Centers: Applications requiring both high rotational speeds and precise positioning
- Robotic Systems: Precision joints and rotary actuators in industrial automation
- Medical Equipment: High-speed dental handpieces and medical imaging devices
- Aerospace Components: Precision rotating assemblies in aircraft systems and instrumentation
