7224 ACD/P4AQBCD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7224 ACD/P4AQBCD Bearing Product Overview & Core Advantages
The 7224 ACD/P4AQBCD is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding industrial applications. Its core advantage lies in its heavy preload (Class D) and back-to-back quadruplex arrangement (QBC), which delivers exceptional system rigidity and stability under complex combined loads (radial and axial). Manufactured to a P4A tolerance class, this bearing set guarantees ultra-high running accuracy, making it ideal for high-precision, high-reliability machinery requiring maximum stiffness and minimal deflection.
7224 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7224 | Basic Bearing Series & Size | Denotes a 120mm bore, 215mm OD, and 40mm single bearing width. |
| ACD | 25° Contact Angle, Heavy Preload | Optimized for high axial load capacity and maximum system rigidity. |
| P4A | Tolerance Class | Super-precision grade for high running accuracy and low vibration. |
| QBC | Quadruplex Back-to-Back | Four bearings are matched and mounted in a back-to-back configuration. |
| D | Axial Internal Clearance / Preload | Specifies the heavy preload applied to the matched set. |
7224 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system that can withstand heavy combined radial and axial loads from multiple directions, significantly reducing shaft deflection under operation.
High-Speed Capability: The phenolic resin cage offers low weight and excellent sliding properties, contributing to stable operation at the specified limiting speed of 10,000 rpm. The optimized 25° contact angle provides a superior balance between axial load capacity and speed performance.
Precision Performance: Adherence to the P4A tolerance class ensures minimal runout and vibration, which is critical for applications requiring high positional accuracy and smooth rotation.
Durability and Material Integrity: Constructed from high-grade chrome steel for both rings and balls, the bearing provides high fatigue life and wear resistance, suitable for a wide operating temperature range from -30°C to 110°C.
7224 ACD/P4AQBCD Bearing Typical Application Areas
The 7224 ACD/P4AQBCD is engineered for high-performance machinery where precision, rigidity, and reliability are paramount. Key application areas include:
- High-Precision Machine Tool Spindles: For grinding, milling, and turning centers that demand extreme accuracy and stiffness.
- High-Speed Spindles: Used in PCB drilling, precision engraving, and other high-RPM machining applications.
- Industrial Robotics: Critical for the high-precision rotary joints and arms requiring high moment rigidity.
- Aerospace and Defense Systems: In gyroscopes, radar platforms, and other precision guidance systems.
