71915 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71915 CD/P4A Bearing Product Overview & Core Advantages
The 71915 CD/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. This precision bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. Its primary advantage lies in its ability to accommodate high combined loads, specifically substantial radial loads and unidirectional axial loads, thanks to its optimized 15° contact angle. The phenolic resin cage contributes to smooth operation at high speeds, making it an ideal, compact solution for high-reliability machinery where space and performance are critical.
71915 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71915 | Basic bearing series and size designation. | Defines the core bearing dimensions: 75mm bore, 105mm OD, 16mm width. |
| CD | Specific internal design and contact angle. | Optimized for high-speed operation with a 15° contact angle. |
| P4 | Tolerance class (equivalent to ABEC-7). | Denotes a high-precision bearing with extremely tight dimensional and running accuracy tolerances. |
| A | Preload designation. | Indicates a specific light preload is applied, enhancing system rigidity and reducing vibration. |
71915 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 tolerance standards, this bearing ensures exceptional dimensional stability and running accuracy, which is critical for applications like machine tool spindles. The applied preload (suffix A) further increases system stiffness, minimizing deflection under load.
Superior Load Capacity: The angular contact design, with a 15° contact angle and a generous complement of 26 balls, provides excellent capacity for combined radial and axial loads in one direction. The high-grade chrome steel construction ensures durability under demanding conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage is a key feature for high-speed applications, offering excellent strength-to-weight ratio, low friction, and smooth guidance of the balls, contributing to the high limiting speed of 19,000 rpm.
Ready for Service: The bearing comes lubricated from the factory, making it immediately ready for installation and initial operation within its specified temperature range.
71915 CD/P4A Bearing Typical Application Areas
The 71915 CD/P4A is ideally suited for high-performance machinery where precision, speed, and reliability are non-negotiable. Key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme rotational accuracy is required.
- High-Frequency Motors and Spindles: In applications demanding low vibration and high rotational speeds.
- Medical Equipment: Such as high-speed dental handpieces and laboratory centrifuges.
- Aerospace and Defense Systems: Including gyroscopes and other precision instrumentation.
