7004 CD/P4AH
7000 Series Super Precision Angular Contact Ball Bearings
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7004 CD/P4AH Bearing Product Overview & Core Advantages
The 7004 CD/P4AH is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational stability. Its key advantage lies in its ability to accommodate combined loads, efficiently handling both radial and significant axial loads in one direction. The 15° contact angle provides an optimal balance between axial load capacity and speed capability. Preloaded and ready for installation, it offers high rigidity and is pre-lubricated for immediate operation, making it ideal for high-precision, high-reliability machinery.
7004 CD/P4AH Bearing Model Code Explained, Specifications & Naming Convention
- 7004: Basic series designation, indicating a metric angular contact ball bearing with a 20mm bore and 42mm outside diameter.
- C: Denotes a 15° contact angle.
- D: Indicates the bearing is supplied as a matched set of two bearings in a specific preload arrangement.
- P4A: Specifies the tolerance class. P4A is a high-precision grade with very tight dimensional and running accuracy tolerances.
- H: Signifies that the bearing is stabilized for high-temperature operation (temperature range: -30°C to 110°C).
7004 CD/P4AH Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, providing a rigid and stable rotational element for demanding applications.
- Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls enable the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic cage and precision-ground components contribute to a high limiting speed of 63,000 rpm, making it suitable for very high-speed spindles.
- Preload & Matched Set: Supplied as a preloaded matched set (D), these bearings are ready for installation in applications like machine tool spindles, eliminating complex adjustment procedures and ensuring immediate, optimal performance.
7004 CD/P4AH Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, dental handpieces, and small precision motors.
- High-Frequency Motors: Where high rotational speed and accuracy are paramount.
- Robotics: Critical joints and arm assemblies requiring high rigidity and precision.
