7018 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7018 CE/HCP4A Bearing Product Overview & Core Advantages
The 7018 CE/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. As a single-row bearing, it is optimized to support high combined loads, primarily thrust loads in one direction, and is available with a preload for enhanced rigidity and rotational accuracy. Its construction with a ceramic ball and phenolic cage enables superior high-speed capabilities and reduced weight. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing is a premier choice for high-reliability, high-speed machinery.
7018 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7018 CE/HCP4A provides detailed technical specifications through its suffixes:
- 7018: Standard bearing series designation, indicating a 90mm bore, 140mm OD, and 24mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation and thrust load capacity.
- E: Indicates an optimized internal design, often referring to reinforced construction and higher load ratings.
- HCP4A: A composite suffix specifying the material and precision.
- HC: Signifies the use of Hybrid Ceramic balls (Silicon Nitride).
- P4: Identifies the tolerance class P4 (ABEC-7), ensuring ultra-precise dimensions and runout.
- A: Confirms that the bearing is supplied with a preload for maximum stiffness.
7018 CE/HCP4A Bearing Structural Features & Performance Benefits
The design of the 7018 CE/HCP4A translates directly into significant performance benefits for demanding applications:
- High-Speed & High-Rigidity Performance: The combination of a 15° contact angle and an applied preload provides exceptional system rigidity and minimizes deflection under load, which is critical for machining accuracy. The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at the limiting speed of 24,000 rpm.
- Superior Load Capacity & Long Service Life: The hybrid ceramic ball construction significantly reduces centrifugal forces, friction, and heat generation. This not only contributes to the high-speed limit but also increases bearing life under demanding conditions. The dynamic load rating of 8055 lbf and static load rating of 7200 lbf ensure reliable operation under significant stress.
- Precision & Thermal Stability: Manufactured to P4 precision tolerances, this bearing guarantees minimal runout and consistent performance. The phenolic cage and ceramic balls contribute to stable operation across the specified temperature range of -30°C to 110°C.
7018 CE/HCP4A Bearing Typical Application Areas
The 7018 CE/HCP4A is ideally suited for high-performance machinery where speed, precision, and reliability are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Arm joints and high-accuracy servo motors.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
