S7018 ACE/HCP4ADT
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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S7018 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The S7018 ACE/HCP4ADT is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. This duplex tandem (DT) matched set is designed to handle combined loads, providing exceptional axial and radial load capacity in a single, compact unit. Its construction with ceramic balls and a P4A tolerance class ensures superior high-speed performance, minimal heat generation, and extended operational life, making it ideal for spindle systems requiring the highest levels of accuracy and rigidity.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Basic bearing series and size designation (90mm bore, 140mm OD). |
| ACE | Indicates a 25° contact angle and specific internal design optimized for high-speed operation. |
| HC | Refers to the Hybrid Ceramic construction, featuring steel rings and ceramic balls. |
| P4A | Denotes an ABEC 7 / ISO P4 super-precision tolerance class with enhanced running accuracy. |
| DT | Signifies the bearings are supplied as a Duplex Tandem (DT) matched set of two bearings. |
S7018 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperatures, and enables higher limiting speeds compared to all-steel bearings. This results in superior high-speed performance and longer service life.
- Duplex Tandem Matched Set: The two bearings are pre-matched and preloaded in a tandem arrangement (DT), which maximizes axial load capacity in one direction and provides exceptional system rigidity for precise shaft positioning.
- Super-Precision P4A Tolerance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and guidance at high speeds, contributing to smooth and reliable operation.
- Preloaded & Sealed: The set comes preloaded for immediate, optimized performance and is sealed to protect against contamination, ensuring reliability.
S7018 ACE/HCP4ADT Bearing Typical Application Areas
The S7018 ACE/HCP4ADT is ideally suited for high-tech machinery where precision, speed, and reliability are paramount. Key application areas include:
- High-Frequency Machine Tool Spindles (e.g., CNC milling, grinding, and jig boring machines)
- Precision Grinding Spindles
- High-Speed Motors and Drives
- Aerospace & Defense Systems (e.g., gyroscopes, radar systems)
- Medical Equipment (e.g., high-speed dental handpieces, centrifuges)
