7217 ACD/HCP4ADBC
Hybrid Ceramic Super Precision Bearings
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7217 ACD/HCP4ADBC Bearing Product Overview & Core Advantages
The 7217 ACD/HCP4ADBC is a duplex back-to-back angular contact ball bearing designed for applications requiring exceptional precision and rigidity. This P4A tolerance class bearing features a moderate preload (Class C) and is supplied as a matched set, ensuring optimal performance and simplified installation. Its key advantage lies in its ability to handle combined radial and axial loads simultaneously with high accuracy, making it an ideal choice for high-speed and high-rigidity spindle systems and other precision machinery.
7217 ACD/HCP4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 7217: Basic bearing series, indicating a 85 mm bore, 150 mm OD, and 56 mm width.
- ACD: Angular Contact design with a 25° contact angle and Duplex arrangement.
- HCP4ADBC: A complex suffix denoting specific manufacturing and matching criteria.
- HC: Indicates the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Specifies a high-precision tolerance class exceeding ABEC 7/ISO P4.
- DB: Identifies the Back-to-Back mounting arrangement of the matched set.
- C: Denotes a Moderate Preload (Class C).
7217 ACD/HCP4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a rigid, moment-resistant bearing system, significantly enhancing operational stability and enabling it to withstand high combined loads.
Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density, high-hardness ceramic balls reduces centrifugal forces, lowers operating temperatures, and allows for a very high limiting speed of 17,000 rpm.
Enhanced Durability and Longevity: Hybrid ceramic construction provides excellent wear resistance, reduced thermal expansion, and extended service life, especially in demanding, high-rotational applications.
Precision & Reliability: Manufactured to P4A super-precision tolerances and supplied as a pre-matched set, this bearing ensures minimal runout, consistent performance, and high rotational accuracy.
7217 ACD/HCP4ADBC Bearing Typical Application Areas
This bearing is engineered for the most demanding precision applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Grinding Equipment
- High-Speed Robotic Drives
- Other machinery requiring high rigidity, high speed, and exceptional accuracy.
