S7215 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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S7215 CD/HCP4A Bearing Product Overview & Core Advantages
The S7215 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rigidity and speed capabilities. This sealed bearing features a single, preloaded arrangement with a 15° contact angle, enabling it to handle combined radial and axial loads simultaneously with high accuracy. Manufactured to a P4 (ABEC-7) tolerance class, it delivers superior running accuracy and rotational stability. The combination of a ceramic ball and phenolic cage makes it an ideal solution for high-speed operation and applications where minimal vibration and long service life are critical.
S7215 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a 15° contact angle and a preloaded duplex arrangement. This configuration provides high rigidity and precise shaft positioning. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and allow for higher limiting speeds. |
| P4A | Denotes a P4 tolerance class (ABEC-7), ensuring extremely tight dimensional and running accuracy for precision machinery. |
S7215 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Preload: The duplex "CD" arrangement applies a consistent preload, eliminating internal clearance. This results in superior stiffness, reduces deflection under load, and enhances rotational accuracy.
- Superior High-Speed Performance: The hybrid ceramic balls are lighter and harder than steel, significantly reducing centrifugal forces and enabling a high limiting speed of 14,000 rpm. The phenolic cage is lightweight and offers excellent performance at high rotational speeds.
- Enhanced Durability and Temperature Resistance: Ceramic balls are electrically resistant and less prone to wear, contributing to a longer bearing service life. The phenolic cage maintains its integrity across the specified temperature range.
- Sealed and Lubricated for Life: The sealed design protects against contamination and retains the factory-applied high-performance grease, making the bearing suitable for maintenance-free operation in clean environments.
S7215 CD/HCP4A Bearing Typical Application Areas
This high-performance bearing is designed for advanced machinery where precision, speed, and reliability are non-negotiable. Key applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Turbines
- Aerospace and Defense Actuators
- Medical and Laboratory Centrifuges
