S71902 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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S71902 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The S71902 CD/HCP4ADGA is a high-precision, double row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing is engineered to accommodate combined loads (simultaneous radial and axial loads) from both directions, offering a compact and robust solution. Its extra light preload (Class A) and P4A tolerance class ensure smooth, precise operation with minimal runout, making it ideal for high-speed spindles and other precision machinery where high rigidity and dimensional stability are paramount.
S71902 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| S7 | Bearing Series | Indicates a high-precision angular contact ball bearing series. |
| 1902 | Size Designation | Specifies the bearing dimensions: 15mm bore, 28mm OD, 14mm width. |
| CD | Contact Angle & Preload | Signifies a 15° contact angle with an extra light preload for high-speed, low-friction operation. |
| HC | Hybrid Ceramic | Denotes ceramic balls, offering reduced weight, higher stiffness, and superior performance at high speeds. |
| P4A | Tolerance Class | Specifies a very high precision level with tight dimensional and running accuracy tolerances. |
| DGA | Seal & Grease | Indicates sealed construction and a specific, high-performance grease lubrication for long service life. |
S71902 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design provides superior high rigidity, enabling stable support for spindles and shafts under significant combined loads. This configuration effectively handles radial loads and bidirectional axial loads simultaneously.
High-Speed Performance: The combination of a lightweight phenolic cage, low-friction ceramic balls, and optimized grease lubrication allows this bearing to achieve an exceptional limiting speed of 95,000 rpm, making it a premier high-speed bearing.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees minimal vibration and precise rotational accuracy. The integrated seals protect against contamination, and the pre-applied grease ensures consistent, maintenance-free operation within a wide temperature range (-30°C to 110°C).
S71902 CD/HCP4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and reliability are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instruments: Measuring devices, optical scanners.
- High-Frequency Motors and Spindles: PCB drilling spindles, dental handpieces.
- Robotics: High-accuracy robotic arm joints and drives.
