71824 CD/HCP4DGB
Hybrid Ceramic Super Precision Bearings
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71824 CD/HCP4DGB Bearing Product Overview & Core Advantages
The 71824 CD/HCP4DGB is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universally matchable (SU) bearing is designed to accommodate combined loads (radial and axial) simultaneously. Its key advantages include superior high-speed capability, enabled by a phenolic cage and ceramic balls, and extremely high rigidity due to its precision P4 tolerance and specific internal geometry. The light preload (Class B) ensures smooth, precise operation with minimal runout, making it ideal for high-reliability, high-accuracy spindles and machinery.
71824 CD/HCP4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71824 | Basic bearing designation, defining the core bearing dimensions (120mm bore, 150mm OD, 32mm width). |
| CD | Indicates a 15° contact angle and is part of the universal matching designation for optimized axial load capacity. |
| HC | Signifies the use of Hybrid Ceramic balls, which reduce centrifugal forces and enable higher speeds. |
| P4 | Denotes a high-precision tolerance class with extremely tight running accuracy for superior performance. |
| DGB | Specifies a Light Preload (Class B) and Universal Matchable (SU) arrangement for simplified mounting and optimal stiffness. |
71824 CD/HCP4DGB Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction and heat generation. This construction provides higher limiting speeds, extended service life, and improved reliability under high-speed conditions.
Phenolic Cage: The lightweight and robust phenolic resin cage offers excellent dimensional stability and low friction at high rotational speeds, contributing directly to the bearing's outstanding high-speed performance.
15° Contact Angle & Universal Matchability (SU): The optimized contact angle provides a balanced capacity for combined radial and axial loads. The universal matchable (SU) design allows any two bearings to be paired in a back-to-back or face-to-face arrangement without selective matching, simplifying installation and ensuring consistent high rigidity and system performance.
Precision P4 Tolerance & Light Preload: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration. The factory-applied light preload (Class B) eliminates internal clearance, resulting in enhanced shaft positioning accuracy and immediate high rigidity upon start-up.
71824 CD/HCP4DGB Bearing Typical Application Areas
This high-precision angular contact ball bearing is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-speed measuring and inspection equipment.
- High-Frequency Motors and Spindles: Where maximum rotational speed and accuracy are critical.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision mechanisms.
