71828 ACDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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71828 ACDGA/HCP4 Bearing Product Overview & Core Advantages
The 71828 ACDGA/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Its defining characteristic is the 25° contact angle, which provides excellent capability to support combined loads—significant radial loads and one-directional axial loads simultaneously. Manufactured to a P4 tolerance class, this bearing ensures exceptional running accuracy, making it ideal for high-speed spindles and other precision machinery. The use of a ceramic ball and phenolic cage combination contributes to its status as a high-speed bearing with a low inertia and extended service life.
71828 ACDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71828 | Basic bearing designation, indicating the bearing size with a 140mm bore and 175mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Indicates a Universal Matchable (SU) bearing, designed to be mounted in pairs (in this case, a set of 2) to support axial loads in both directions. |
| HC | Refers to the Hybrid Ceramic construction, featuring steel rings and ceramic balls. |
| P4 | Denotes the tolerance class, signifying very high precision for running accuracy and dimensional stability. |
71828 ACDGA/HCP4 Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Performance: The phenolic cage is lightweight and robust, enabling the bearing to achieve a high limiting speed of 11,000 rpm with minimal centrifugal forces. The ceramic balls reduce friction, heat generation, and wear, further enhancing high-speed capability and service life.
Superior Load Capacity: The optimized 25° contact angle and high-grade chrome steel rings provide excellent radial dynamic and static load ratings (9518 lbf and 13162 lbf, respectively), making it capable of handling demanding combined loads.
Precision Engineering: The P4 tolerance class ensures minimal runout and precise dimensional control, which is critical for applications requiring high rotational accuracy and high rigidity.
Universal Matching Design: The DGA suffix confirms that this bearing is universally matchable. When mounted in pairs with a specific preload (in this case, Extra light / Class A), they form a set that can accommodate axial loads from both directions, simplifying design and installation.
71828 ACDGA/HCP4 Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for advanced applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In high-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Where low inertia and high rotational speeds are critical.
- Aerospace and Defense Systems: In gyroscopes, navigation systems, and other critical rotating assemblies.
- Medical Equipment: For dental handpieces and imaging device rotors.
