S71915 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71915 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The S71915 CD/HCP4ADGA is a super-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a duplex set, it is designed to accommodate combined loads (radial and axial) simultaneously. Its construction with a P4A tolerance class and ceramic balls ensures superior running accuracy, low heat generation, and extended service life, making it ideal for high-reliability, high-rigidity spindles.
S71915 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1915 | Dimension series code (19) and bore diameter code (15 → 75mm bore). |
| CD | Duplex bearing arrangement with a 15° contact angle, designed for universal matching (SU). |
| HC | Hybrid ceramic bearing designation, indicating ceramic balls for reduced centrifugal force and higher speed capability. |
| P4A | Tolerance class denoting very high precision for both bore and outside diameter (tighter than ABEC 7). |
| DGA | Indicates the bearing is sealed and pre-lubricated with a specific grease suitable for the specified temperature range. |
S71915 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex (CD) arrangement and universal matchability create a preloaded set that provides high system rigidity, enabling it to handle significant combined loads with stability.
Superior High-Speed Performance: The combination of hybrid ceramic balls (lower density than steel) and a lightweight phenolic cage significantly reduces centrifugal forces, allowing for a high limiting speed of 28,000 rpm. The 15° contact angle is optimized for high-speed applications where axial load is moderate.
Extended Service Life & Reliability: The sealed design and factory-applied grease lubrication protect against contamination and provide maintenance-free operation within the specified temperature range of -30°C to 110°C. The P4A precision ensures minimal vibration and consistent performance.
S71915 CD/HCP4ADGA Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing equipment.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Medical Equipment: High-speed handpieces and dental drills.
- Aerospace & Defense Systems: Gyroscopes and other precision instrumentation.
