7018 ACD/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7018 ACD/HCP4AH1 Bearing Product Overview & Core Advantages
The 7018 ACD/HCP4AH1 is a single row angular contact ball bearing designed for applications demanding high precision and high-speed operation. Engineered to a P4A tolerance class, it offers exceptional dimensional accuracy and running precision. A key feature is its ceramic ball construction, which significantly reduces centrifugal forces and enables superior performance at the specified limiting speed. This bearing is preloaded and pre-lubricated, making it ready for immediate installation in high-rigidity systems that primarily handle axial loads.
7018 ACD/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series and size code. |
| AC | Angular Contact design with a 25° contact angle. |
| D | High load capacity internal design. |
| HC | Hybrid Ceramic construction, featuring ceramic balls. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7/ISO P4 standards. |
| H1 | Denotes a specific preload level for optimal rigidity. |
7018 ACD/HCP4AH1 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls with a phenolic cage results in lower density, reduced friction, and superior performance at the high limiting speed of 16,000 rpm. This combination is ideal for high-speed applications.
- High Rigidity & Preload: The bearing is supplied with a specific preload (H1), ensuring high system rigidity, minimal axial play, and precise rotational accuracy from the moment of installation.
- Precision & Load Capacity: Manufactured to P4A tolerance class, it guarantees consistent performance. With a 25° contact angle and optimized internal geometry, it offers excellent axial load carrying capacity and a high dynamic load rating of 16,672 lbf.
- Optimized for Matched Sets: While supplied as a single bearing, its design allows it to be universally matched in sets (2 bearings in this specification) to handle complex combined loads in duplex arrangements.
7018 ACD/HCP4AH1 Bearing Typical Application Areas
The 7018 ACD/HCP4AH1 is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles (High-speed milling and grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Dental and Medical Handpieces
- Aerospace Instrumentation
