7040 ACD/P4ADGC
7000 Series Super Precision Angular Contact Ball Bearings
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7040 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 7040 ACD/P4ADGC is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers outstanding performance under combined radial and axial loads. Manufactured to P4A tolerance class with a 25° contact angle and moderate preload (Class C), this bearing is engineered for high-speed operation up to 16,250 rpm while maintaining dimensional stability and long service life in demanding industrial environments.
7040 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | Angular Contact Design with 25° contact angle | Optimized for handling combined loads and high axial capacity |
| P4A | High precision tolerance class (superior to ABEC 7) | Exceptional running accuracy and minimal vibration |
| DGC | Universal Matchable bearing pair with controlled preload | Simplified mounting and optimized stiffness in paired arrangements |
7040 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double bearing arrangement with moderate preload provides superior stiffness, enabling precise positioning under heavy combined radial and axial loads (dynamic rating: 103,950 lbf, static rating: 165,375 lbf).
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore tolerance: -0.004mm to 0), ensuring consistent high-precision performance in critical applications.
High-Speed Capability: The phenolic cage and optimized internal geometry allow stable operation at limiting speeds up to 16,250 rpm, making it ideal for high-speed spindle applications.
Thermal Stability: Chrome steel construction and phenolic cage maintain dimensional stability across the operating temperature range of -30°C to 110°C.
7040 ACD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Industrial Pumps: Chemical processing pumps, high-pressure hydraulic systems
- High-Speed Compressors: Air compressors and gas handling equipment requiring precision bearings
- Robotics & Automation: Industrial robot joints, precision positioning systems
- Aerospace Components: Aircraft auxiliary systems and precision instrumentation
