71924 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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71924 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 71924 CDGB/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This single bearing features a 15° contact angle and Universal Matchable (SU) designation, allowing for precise preloading when mounted alongside other SU-classified bearings. Its core advantages include superior high-speed capability with a limiting speed of 10,000 rpm, enabled by a lightweight phenolic cage and ceramic balls, and the ability to handle significant combined loads (radial and axial). Manufactured to P4A tolerance class with extremely tight dimensional tolerances, it is the ideal choice for high-rigidity, high-performance spindle systems.
71924 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 71924: Basic bearing designation indicating a light series, 120mm bore, 165mm OD angular contact bearing.
- C: Denotes a 15° contact angle.
- D: Indicates the bearing is filled with a light preload (Class B).
- GB: Specifies the use of Ceramic (Si3N4) balls and a Phenolic (resin) cage.
- HCP4A: Signifies the bearing is Universal Matchable (SU) and manufactured to P4A super-precision tolerance class.
71924 CDGB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to the stringent P4A tolerance class with bore and OD tolerances of -0.004mm to 0, this bearing ensures minimal runout and stable rotational accuracy, providing a high-rigidity foundation for spindle systems.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling stable operation at the high limiting speed of 10,000 rpm.
- Enhanced Load Capacity: The 15° contact angle is optimized to handle substantial combined radial and axial loads, with dynamic and static load ratings of 17,550 lbf and 20,588 lbf respectively.
- Universal Matching: As an SU Universal Matchable bearing, it can be universally mounted with other SU bearings in sets (typically 3) to achieve defined preload levels without selective matching, simplifying installation and inventory.
71924 CDGB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPMs.
