7207 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7207 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7207 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features a 15° contact angle and is manufactured to P4A tolerance class, ensuring ultra-precise rotational characteristics. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed capabilities with a limiting speed of 41,000 rpm, and outstanding rigidity due to its optimized internal geometry. The use of ceramic balls and a phenolic cage further enhances its performance in high-velocity and thermally challenging environments.
7207 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7207 | Standard bearing series designation, indicating a 35mm bore, 72mm OD, and 17mm width. |
| C | Denotes a 15° contact angle. |
| DG | Indicates a Universal Matchable (SU) bearing, designed to be paired in sets (3 bearings in this matched set). |
| A | Signifies an Extra Light preload (Class A) for minimal friction and high-speed operation. |
| HCP4A | Defines the tolerance class P4A, representing very high dimensional and running accuracy. |
7207 CDGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The bearing's angular contact design and P4A tolerance class provide superior shaft guidance and rotational accuracy, making it ideal for high-precision spindles.
Enhanced Load Capacity: The 15° contact angle is optimized to handle significant combined loads (radial and axial), offering reliable performance under complex loading conditions.
Superior High-Speed Performance: The combination of a lightweight phenolic cage, low-friction ceramic balls, and an extra light preload enables exceptionally high limiting speeds (41,000 rpm), reducing centrifugal forces and operational temperatures.
Advanced Material Composition: Ceramic balls provide advantages such as reduced weight, higher stiffness, lower thermal expansion, and extended service life in high-speed and corrosive environments compared to steel balls.
7207 CDGA/HCP4A Bearing Typical Application Areas
The 7207 CDGA/HCP4A is specifically designed for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Aerospace and Defense Systems: Gyroscopes, navigation systems, and other critical components.
