7007 CD/P4ADFA
7000 Series Super Precision Angular Contact Ball Bearings
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7007 CD/P4ADFA Bearing Product Overview & Core Advantages
The 7007 CD/P4ADFA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and stiffness. This duplex bearing set features a Face-to-Face (DF) matched arrangement and an Extra Light (A) preload, making it ideal for machine tool spindles and other high-precision machinery. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity and smooth operation at elevated speeds, ensuring superior performance and long service life in critical applications.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7007 | Basic bearing series and size designation (35mm bore, 62mm OD). |
| CD | Indicates a duplex bearing set with a Face-to-Face (DF) mounting arrangement. |
| P4A | Specifies the high-precision tolerance class (P4A), exceeding standard ABEC 7/ISO P4 levels for superior running accuracy. |
| DFA | Denotes a specific factory-set preload level. "A" signifies an Extra Light preload, optimized for high-speed applications with minimal friction and heat generation. |
7007 CD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex DF arrangement provides exceptional stiffness, enabling the bearing to withstand significant combined radial and axial loads. This configuration increases system stability and reduces deflection under load.
- Precision & High-Speed Performance: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. The phenolic resin cage is lightweight and robust, contributing to smooth operation and a high limiting speed of 56,000 rpm. The 15° contact angle offers an excellent balance between radial and axial load capacity.
- Optimized for Precision Applications: The extra light preload (A) eliminates internal clearance, ensuring precise shaft positioning and immediate response to load changes, which is critical for applications like machining centers.
- Superior Material & Construction: Made from chrome steel for both rings and balls, the bearing offers high durability and wear resistance. It comes pre-lubricated for immediate use, covering a wide operating temperature range.
7007 CD/P4ADFA Bearing Typical Application Areas
The 7007 CD/P4ADFA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling heads.
- High-Speed Robotic Drives: Precision joints and actuators in industrial robots.
- Precision Instrumentation: Medical devices, optical scanners, and coordinate measuring machines.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
