7018 CE/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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7018 CE/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7018 CE/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings in a back-to-back (QBC) arrangement is engineered to handle combined radial and axial loads simultaneously. Featuring an extra light preload (Class A) and manufactured to P4A super-precision tolerance, it delivers outstanding running accuracy, high-speed capability, and superior system stability. The use of ceramic balls further enhances its performance by reducing centrifugal forces and operating temperatures.
7018 CE/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CE | 15° Contact Angle | Optimized for high-speed operation with balanced axial and radial load capacity. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduced weight, lower friction, and extended service life at high speeds. |
| P4A | Super Precision Tolerance | Ensures minimal runout and vibration for ultra-precise applications. |
| QBC | Quadruplex Back-to-Back Arrangement | Provides maximum rigidity and moment load capacity in a compact design. |
7018 CE/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Exceptional Rigidity: The quadruplex back-to-back configuration creates an extremely rigid bearing system, effectively resisting moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
- High-Speed Performance: The combination of a lightweight phenolic cage, low-density ceramic balls, and an extra light preload allows for a very high limiting speed of 15,000 rpm, minimizing centrifugal forces and heat generation.
- Superior Load Capacity: With a 15° contact angle and a high complement of 28 balls, this bearing set offers a high dynamic and static load rating for its compact bearing dimensions (90mm bore, 140mm OD).
- Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, ensuring optimal performance from initial startup and simplifying the installation process.
7018 CE/HCP4AQBCA Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for applications where extreme accuracy, high speed, 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 rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment.
- High-Frequency Motors and Spindles: Where minimal vibration and runout are required.
