7007 CD/P4ADGC
7000 Series Super Precision Angular Contact Ball Bearings
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7007 CD/P4ADGC Bearing Product Overview & Core Advantages
The 7007 CD/P4ADGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is universally matchable (SU), allowing two bearings to be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to optimize performance for specific load conditions. Its 15° contact angle and moderate preload (Class C) make it exceptionally capable of handling combined loads—simultaneous radial and axial forces—making it a cornerstone for high-speed and high-rigidity spindle systems.
7007 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7007 | Basic bearing series, indicating a 35mm bore, 62mm OD, and 28mm width. |
| CD | Indicates a 15° contact angle and that the bearing is designed as one of a universally matchable (SU) pair. |
| P4A | Denotes a high-precision tolerance class with running accuracy requirements even tighter than ABEC 7/P4. |
| DGC | Signifies the bearing is lubricated and comes with a moderate preload (Class C) applied. |
7007 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and moderate preload eliminate internal clearance, resulting in significantly increased system stiffness. This enables the bearing to reliably support combined radial and axial loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerances with a phenolic resin cage, the bearing ensures minimal vibration and stable operation at high rotational speeds, with a limiting speed of 56,000 rpm.
- Universal Matchability (SU): This feature provides design flexibility, allowing engineers to create optimized bearing sets (DB, DF, DT) from single bearings to achieve the exact stiffness and moment load capacity required for the application.
- Optimized Internal Geometry: With 16 high-precision chrome steel balls of 7.938mm diameter, the bearing is engineered for smooth operation and long service life under demanding conditions.
7007 CD/P4ADGC Bearing Typical Application Areas
The 7007 CD/P4ADGC is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motorized spindles.
- Robotics: High-accuracy rotary joints and arm actuators.
- Medical Equipment: Dental handpieces and imaging device rotors.
