7004 CDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7004 CDGC/P4A Bearing Product Overview & Core Advantages
The 7004 CDGC/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to ABEC 7 / P4A tolerance class, it delivers superior running precision. Its 15° contact angle is optimized to support significant combined loads, handling both radial and axial forces efficiently. The bearing is pre-lubricated and features a phenolic resin cage, contributing to its high-speed capability and smooth operation. As part of a Universal Matchable (SU) set, it enables simplified installation of pre-loaded bearing arrangements, making it ideal for high-reliability, high-speed spindles and precision machinery.
7004 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7004 | Standard Bearing Series & Size | Indicates a metric series bearing with a 20mm bore, 42mm OD, and 12mm width. |
| CD | Contact Angle & Universal Matching | Specifies a 15° contact angle and designates the bearing as Universal Matchable (SU). |
| GC | Preload Class | Indicates a Moderate preload (Class C), providing a balance between rigidity and operating temperature. |
| P4A | Tolerance Class | Denotes a high-precision bearing with tolerances equivalent to ABEC 7, ensuring minimal runout and vibration. |
7004 CDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with tight dimensional controls on bore, OD, and width, this bearing provides exceptional rotational accuracy and system stiffness, crucial for machining centers and precision equipment.
- Optimized Load Capacity: The 15° contact angle enables the bearing to effectively support combined radial and axial loads simultaneously, a key requirement for spindle applications.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures stability and low centrifugal forces at high speeds, contributing to the high limiting speed of 63,000 rpm.
- Universal Matching Simplification: As a Universal Matchable (SU) bearing, any combination of these bearings can be mounted together to achieve a pre-defined preload, drastically simplifying the assembly of high-precision spindle units.
7004 CDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, CNC milling, and grinding spindles.
- Precision Instrumentation: High-accuracy measuring devices and laboratory equipment.
- High-Speed Motors: Spindles for PCB drilling and other applications requiring high RPM and precision.
- Robotics: Joints and actuators in advanced robotic systems demanding high rigidity and accuracy.
