7040 ACD/P4AQGB
7000 Series Super Precision Angular Contact Ball Bearings
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7040 ACD/P4AQGB Bearing Product Overview & Core Advantages
The 7040 ACD/P4AQGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle optimized for high axial load capacity. Its Universal Matchable (SU) design allows for flexible mounting configurations in preloaded sets, delivering superior stiffness and positioning accuracy in demanding industrial environments. Manufactured to P4A tolerance class, it ensures minimal runout and consistent performance in high-precision machinery.
7040 ACD/P4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Impact |
|---|---|---|
| ACD | Angular Contact Design (25° contact angle) | Optimized for high axial load capacity and rigidity |
| P4A | High Precision Tolerance Class | Superior dimensional accuracy and running precision |
| QGB | Light Preload / Class B | Reduced deflection and enhanced stiffness in mounted sets |
7040 ACD/P4AQGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 25° contact angle provides exceptional resistance to combined loads, while the Universal Matchable (SU) configuration enables precise preloading for maximum system stiffness. With a dynamic load rating of 166,725 lbf and static load rating of 328,500 lbf, this bearing delivers reliable performance under heavy operating conditions.
Precision Engineering: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring minimal runout and vibration. The phenolic cage provides excellent dimensional stability and reduced friction at high speeds.
Optimized Component Design: Features 21 precision-ground chrome steel balls with 34.925mm diameter, distributed to maximize load distribution and minimize stress concentrations. The open design allows for efficient lubrication management within the specified temperature range of -30°C to 110°C.
High-Speed Capability: The combination of precision components and optimized internal geometry enables operation at limiting speeds up to 16,250 rpm, making it suitable for high-speed spindle applications.
7040 ACD/P4AQGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machines
- Industrial Pumps & Compressors: High-speed centrifugal pumps and compressor systems
- Precision Gearboxes: Industrial transmission systems requiring high accuracy and stiffness
- Robotics & Automation: Precision joints and positioning systems in industrial robots
- Aerospace Components: Aircraft auxiliary systems and precision mechanisms
- Medical Equipment: High-speed dental handpieces and medical imaging devices
