7017 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7017 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7017 CDGA/HCP4A is a single row angular contact ball bearing engineered for applications demanding the highest levels of precision and speed. Positioned in the P4A super-precision tolerance class, it is designed to provide exceptional running accuracy and rotational stability. Its core advantages stem from its ceramic ball construction and universal matchable (SU) design, enabling it to handle high-speed operations and complex combined loads with superior reliability and a long service life.
Model Code Breakdown
- 7017: Standard bore diameter (85 mm) and series designation.
- C: Denotes a 15° contact angle, optimized for high-speed applications.
- D: Indicates the use of a Phenolic (resin) cage, which is lightweight and ideal for high-speed operation.
- GA: Specifies that the bearing is universally matchable (SU). Two bearings can be mounted in a back-to-back (DB) or face-to-face (DF) arrangement to accommodate combined loads.
- HCP4A: A composite suffix where:
- HC: Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings).
- P4A: Denotes a super-precision tolerance class with enhanced running accuracy and dimensional stability.
7017 CDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Thermal Stability: The combination of a lightweight phenolic cage and ceramic (Si3N4) balls significantly reduces centrifugal forces and generates less heat, enabling a high limiting speed of 28,000 rpm. The hybrid construction also provides superior performance across a wide temperature range (-30°C to 110°C).
Precision & Rigidity: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration. The 15° contact angle provides an optimal balance between radial load capacity and axial load capacity, delivering high system rigidity.
Extended Service Life: Ceramic balls are harder, smoother, and lighter than steel balls, leading to dramatically reduced wear, lower friction, and a longer calculated fatigue life, especially in high-speed and poorly lubricated conditions.
Universal Matching Capability: The Universal Matchable (SU/GA) designation means bearings can be paired in any combination without pre-selection, simplifying inventory and assembly for preloaded duplex sets to handle combined loads.
7017 CDGA/HCP4A Bearing Typical Application Areas
The 7017 CDGA/HCP4A is ideally suited for high-performance machinery where precision and speed are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing equipment.
- High-Frequency Motors and Turbomachinery.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace Instrumentation and Gyroscopes.
