7002 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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7002 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7002 CD/HCP4AQBCA is a high-precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This metric bearing set is characterized by its P4A super-precision tolerance class and extra light preload (Class A), ensuring exceptional running accuracy and minimal rotational vibration. The back-to-back (QBC) arrangement provides high system rigidity and excellent stability when subjected to complex combined loads, including radial and axial forces. Featuring ceramic balls and a phenolic cage, it is engineered for superior high-speed performance and reduced operational friction.
Model Code In-Depth Analysis
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series, with 15mm bore and 32mm outside diameter. |
| CD | Indicates a set of two bearings in a back-to-back (DB) arrangement. In this context, it is part of the quadruplex set designation. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls (typically silicon nitride) for higher speed and reduced weight. |
| P4A | The tolerance class, denoting super-precision levels with enhanced running accuracy and dimensional control. |
| QBC | Quadruplex Back-to-Back arrangement. This is a matched set of four bearings pre-configured in a back-to-back duplex pair, providing maximum system rigidity. |
| A | Specifies the contact angle of 15°, optimized for carrying significant axial loads. |
7002 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Superior Rigidity & Load Capacity: The quadruplex back-to-back (QBC) matched arrangement creates an exceptionally stiff bearing system, ideal for applications where shaft deflection must be minimized. This configuration provides excellent capability to handle combined radial and axial loads from both directions.
- Enhanced High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a very high limiting speed of 100,000 rpm. This makes it suitable for ultra-high-speed spindles.
- Exceptional Precision and Smooth Operation: Manufactured to P4A super-precision tolerance standards with an extra light preload, this bearing set guarantees minimal runout, low noise, and ultra-smooth rotation, which is critical for achieving high surface finish and machining accuracy.
- Optimized for Precision Applications: The open seal type allows for custom lubrication schemes tailored to specific operational needs, while the standard lubrication is sufficient for immediate operation within the specified temperature range.
7002 CD/HCP4AQBCA Bearing Typical Application Areas
This high-performance bearing set is engineered for advanced machinery requiring the utmost in precision, speed, and rigidity. Key application areas include:
- High-Frequency CNC Spindles for precision milling, grinding, and drilling
- High-Speed Machining Centers
- Precision Instrumentation and measuring equipment
- Semiconductor Manufacturing Equipment
- Advanced Robotics and automation systems
