7040 ACD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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7040 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7040 ACD/P4ADGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it delivers superior running precision. Its 25° contact angle and Universal Matchable (SU) design enable it to accommodate combined radial and axial loads efficiently. This bearing is preloaded (Light / Class B) and comes pre-lubricated, making it an ideal, high-performance solution for high-speed, high-rigidity spindle systems.
7040 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a very high precision tolerance class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
| DGB | Signifies a Universal Matchable (SU) bearing pair. Two bearings are selectively matched to form a pre-loaded set, ensuring optimal stiffness and performance. |
7040 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The combination of a 25° contact angle and a Light preload provides high system rigidity, enabling the bearing to handle significant combined radial and axial loads (Dynamic: 103,950 lbf, Static: 165,375 lbf).
- Precision High-Speed Performance: The phenolic cage and optimized internal geometry contribute to stable operation at high speeds, with a limiting speed of 16,250 rpm. The P4A tolerance class ensures minimal vibration and heat generation.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is designed to be used in pairs (2 bearings per set). This matched arrangement simplifies installation and guarantees consistent, pre-determined preload and performance.
- Durable Construction: Manufactured from chrome steel for both rings and balls, this bearing offers high durability and a long service life under demanding conditions.
7040 ACD/P4ADGB Bearing Typical Application Areas
The 7040 ACD/P4ADGB is ideally suited for high-precision, high-speed machinery where rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Other Precision Rotary Equipment requiring superior running accuracy and stiffness.
