7205 CD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7205 CD/P4A Bearing Product Overview & Core Advantages
The 7205 CD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with a 15° contact angle and P4 (ABEC-7) tolerance class, it is engineered to handle combined loads—significant radial loads and one-directional axial loads—simultaneously. Its key advantages include high rigidity and high-speed capability, making it an ideal choice for high-performance spindles and precision machinery where uncompromising accuracy is required.
7205 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series, indicating a metric angular contact ball bearing with a 25mm bore, 52mm OD, and 15mm width. |
| CD | Specific internal design optimized for high rigidity and high-speed operation. |
| P4 | Tolerance class equivalent to ABEC-7, denoting ultra-precision dimensional and running accuracy. |
| A | Indicates a 30° contact angle (Note: Specification data indicates 15°; please verify application requirements). |
7205 CD/P4A Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The 15° contact angle provides an excellent balance between radial load capacity and axial load capacity in one direction, making it suitable for combined loads.
High-Speed Phenolic Cage: The lightweight and robust phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 45,000 rpm.
Ultra-Precision Manufacturing: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high rotational accuracy.
Preload & High Rigidity: The bearing is supplied with a preload, resulting in increased system rigidity, reduced deflection under load, and enhanced positional accuracy of the shaft.
Chrome Steel Construction: Both rings and balls are made from high-grade chrome steel, providing excellent durability, wear resistance, and a long operational life.
7205 CD/P4A Bearing Typical Application Areas
The 7205 CD/P4A is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Where low vibration and high accuracy are paramount.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Robotics: Precision joints and arm articulation systems.
