S71924 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71924 CDGB/HCP4A Bearing Product Overview & Core Advantages
The S71924 CDGB/HCP4A is a super-precision angular contact ball bearing engineered for the most demanding high-speed and high-rigidity applications. Representing the pinnacle of P4A tolerance class manufacturing, this bearing is designed to handle combined radial and axial loads simultaneously with exceptional accuracy. Its ceramic balls and phenolic cage contribute to superior high-speed performance, reduced heat generation, and extended service life. As a universally matchable bearing supplied in a set of four, it enables the creation of optimized, pre-loaded spindle arrangements for ultimate rotational stability.
S71924 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S71924 | Basic bearing series and size designation (120mm bore, 165mm OD, 22mm width). | Identifies the bearing's core dimensions and internal geometry. |
| CD | 15° contact angle and universal matchable design. | Optimized for high-speed operation and allows for flexible mounting in sets to achieve specific preload. |
| GB | Light preload (Class B). | Provides minimal internal clearance for enhanced rigidity and precise running accuracy, ideal for high-speed spindles. |
| HC | Hybrid Ceramic construction (Ceramic balls with steel rings). | Reduces centrifugal forces, lowers operating temperature, and increases limiting speed and service life. |
| P4A | Super-precision tolerance class. | Guarantees extremely tight dimensional and running accuracy, essential for applications requiring minimal vibration and high positional precision. |
S71924 CDGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic (silicon nitride) balls significantly reduces weight and centrifugal load on the outer ring at high speeds. This results in lower operating temperatures, a higher limiting speed (11,000 rpm), and superior resistance to wear and electrical arcing compared to all-steel bearings.
High Rigidity & Load Capacity: The angular contact design and light preload (GB) ensure maximum shaft support, providing high system rigidity. With a dynamic load rating of 17,550 lbf and a static load rating of 20,588 lbf, it reliably handles significant combined loads.
Optimized High-Speed Performance: The phenolic resin cage is lightweight, strong, and exhibits excellent performance under high centrifugal forces and lubrication starvation, which is critical for maintaining integrity at extreme speeds.
Precision & Longevity: Manufactured to P4A tolerance class with a 15° contact angle, this bearing ensures smooth, quiet, and precise rotation. The standard grease lubrication and sealed design protect against contamination, contributing to a long, maintenance-free service life within its specified temperature range of -30°C to 110°C.
S71924 CDGB/HCP4A Bearing Typical Application Areas
The S71924 CDGB/HCP4A is the bearing of choice for high-performance machinery where speed, precision, and reliability are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed CNC milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors and generators operating at very high RPMs.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
