71926 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71926 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 71926 CDGA/HCP4A is a single row angular contact ball bearing designed for ultra-high precision and demanding applications. Engineered to a P4A tolerance class, it delivers exceptional running accuracy and rotational stability. A key feature is its Universal Matchable (SU) designation, allowing it to be pre-loaded in sets of three to achieve superior system rigidity. The combination of a ceramic ball material and phenolic cage enables outstanding high-speed performance, with a limiting speed of 7,500 rpm, making it ideal for machine tool spindles and other high-precision, high-velocity machinery.
71926 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71926 | Basic bearing designation | Defines the standard bore (130 mm), outside diameter (180 mm), and width (24 mm) dimensions. |
| C | 15° Contact Angle | Optimized for high-speed applications requiring a balance between axial and radial load capacity. |
| DGA | Universal Matchable (SU) with Extra Light Preload (A) | Indicates the bearing is part of a universally matchable set and comes with a specific extra light preload for immediate high-rigidity performance when mounted in a group. |
| HCP4A | Hybrid Ceramic & P4A Tolerance | "HC" signifies Hybrid Ceramic construction (steel rings, ceramic balls), offering reduced friction and heat generation. "P4A" denotes an ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration. |
71926 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls with steel rings results in lower density, reduced centrifugal forces, and higher stiffness. This directly contributes to lower operating temperatures and extended bearing life, especially at high speeds.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance for the ceramic balls, further enhancing high-speed capability and reducing friction.
Ultra-Precision P4A Tolerance: Manufactured to the strictest P4A tolerance class, this bearing guarantees exceptional running accuracy, minimal vibration, and superior positional control for the most demanding spindle applications.
Universal Matching & Preload: As a Universal Matchable (SU) bearing supplied with extra light preload (A), it can be mounted in any combination with other SU bearings to create a pre-loaded set, delivering maximum system rigidity and rotational precision without the need for selective assembly.
71926 CDGA/HCP4A Bearing Typical Application Areas
The 71926 CDGA/HCP4A is engineered for the most critical high-speed and high-precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring the utmost in surface finish and dimensional accuracy.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other instrumentation requiring ultra-precise rotation.
