7017 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7017 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 7017 CEGA/HCP4A is a single row angular contact ball bearing engineered for ultra-high precision and performance in demanding applications. Positioned in the P4A super precision tolerance class, this bearing is characterized by its extra light preload (Class A) and universal matchable (SU) design, enabling optimized stiffness and running accuracy in paired arrangements. Its construction, featuring a phenolic cage and ceramic balls, is tailored for high-speed operation and superior dynamic response, making it an ideal solution for machine tool spindles and other high-accuracy rotational systems.
Model Code Breakdown
- 7017: Basic series designation, indicating a medium series angular contact bearing with an 85mm bore and 130mm outside diameter.
- CE: Signifies a 15° contact angle and indicates the internal design and internal clearance optimized for high speeds and universal matching.
- GA: Denotes the Universal Matchable (SU) designation. Two bearings can be mounted in a universal arrangement (face-to-face or back-to-back) to support combined loads.
- HCP4A: A composite suffix.
- P4A: Specifies the tolerance class, exceeding ABEC 7/ISO P4 standards for exceptional dimensional and running accuracy.
- HC: Likely refers to the use of Hybrid Ceramic components (ceramic balls with steel rings).
7017 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing service life, especially under high-speed conditions. This construction also provides enhanced resistance to electrical erosion.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance and stability of the ceramic balls at very high rotational speeds, contributing to the bearing's impressive limiting speed of 28,000 rpm.
Precision & Preload: Manufactured to P4A super precision tolerances with an extra light preload, this bearing delivers minimal runout and high rotational accuracy, which is critical for applications requiring extreme positioning precision.
Load Capacity: With a dynamic load rating of 7762 lbf and a static load rating of 6525 lbf, the 7017 CEGA/HCP4A is capable of handling significant combined radial and axial loads.
7017 CEGA/HCP4A Bearing Typical Application Areas
This high-performance bearing is specifically designed for advanced machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
