7017 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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7017 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7017 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This universally matchable (SU) bearing is part of a matched set of two, enabling it to handle combined loads efficiently. Its core advantages include superior running accuracy due to its P4A tolerance class, high-speed capability facilitated by a phenolic cage and ceramic balls, and the ability to sustain significant radial dynamic and static load ratings. Pre-lubricated for immediate use, it offers reliable performance in a compact design, making it ideal for high-performance spindles and precision machinery.
7017 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Standard bearing series number, indicating a metric bore diameter of 85 mm, outer diameter of 130 mm, and width of 44 mm. |
| CD | Contact angle of 15° and a specific internal design optimized for high-precision applications. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls which reduce friction, heat generation, and allow for higher speeds. |
| P4A | A very high tolerance class denoting exceptional dimensional and running accuracy, superior to standard ABEC-7/P4 levels. |
| DGA | Universal Matchable (SU) designation. This bearing is supplied as one of a matched pair (SU arrangement) that can be mounted in either a face-to-face or back-to-back configuration to optimize stiffness and load handling. |
7017 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm. This construction also provides superior resistance to wear and a longer operational life.
Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at high speeds, offering excellent strength and dimensional stability.
Universal Matchability (SU): As a universally matchable bearing supplied in a set of two, it allows for versatile mounting arrangements. This provides designers with flexibility to achieve the desired level of system rigidity and to effectively manage combined loads and moments.
Extra Light Preload (Class A): This preload class minimizes starting and running torque while ensuring high shaft positioning accuracy and system stiffness, which is critical for applications like machine tool spindles.
Precision Tolerances: The P4A tolerance class and tight dimensional tolerances on the bore, outer diameter, and width ensure predictable performance, reduced vibration, and enhanced precision in the final application.
7017 CD/HCP4ADGA Bearing Typical Application Areas
The 7017 CD/HCP4ADGA is engineered for high-performance applications where speed, precision, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Where extreme rotational speeds are required.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
- Medical Equipment: Dental handpieces and high-speed imaging devices.
