S71902 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71902 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71902 CDGA/HCP4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and high-speed capability. As a universal matchable bearing, it is supplied in a set of two for simplified mounting in preloaded arrangements. Its core advantages include the ability to handle combined radial and axial loads simultaneously, outstanding dimensional stability due to its P4A tolerance class, and superior high-speed performance enabled by its ceramic balls and phenolic cage. This compact and lightweight bearing is engineered for high reliability in precision machinery.
S71902 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1902 | Bore size code (15 mm). |
| C | 15° contact angle, optimized for high-speed operation. |
| DG | Universal Matchable (DUO) bearing designation. |
| A | Light preload class. |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | High precision tolerance class (equivalent to ABEC 7). |
S71902 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at high speeds. This design also offers improved resistance to electrical erosion.
- Phenolic Cage: The lightweight and robust phenolic resin cage contributes to excellent high-speed stability and low vibration levels, supporting the bearing's limiting speed of 95,000 rpm.
- Universal Matching (SU): Supplied as a precision-matched pair, these bearings can be mounted in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to achieve the required system rigidity and preload.
- Precision & Rigidity: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and precise shaft positioning. The 15° contact angle provides a balanced capacity for both radial and axial loads.
- Sealed & Greased: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S71902 CDGA/HCP4A Bearing Typical Application Areas
The S71902 CDGA/HCP4A is ideally suited for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- Dental and Medical Handpieces
- High-Frequency Motors and Spindles
- Aerospace Actuators and Instrumentation
- Semiconductor Manufacturing Equipment
