7018 ACEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7018 ACEGA/HCP4AL Bearing Product Overview & Core Advantages
The 7018 ACEGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined radial and axial loads simultaneously, this bearing features a single-row design with a 25° contact angle, optimized for high rigidity and precise operation. Its P4A tolerance class ensures ultra-precise dimensional and running accuracy, making it ideal for high-speed spindles and other critical machinery. The use of ceramic balls and a phenolic cage contributes to reduced friction, lower operating temperatures, and extended service life, particularly in high-velocity environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, indicating a metric angular contact bearing with a 90mm bore and 140mm outside diameter. |
| AC | Angular Contact design. |
| EGA | Universal Matchable (SU) bearing in a set of 2, preloaded to Extra Light (Class A). |
| HC | Hybrid Ceramic, indicating ceramic balls are used. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
7018 ACEGA/HCP4AL Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers friction, and enables higher limiting speeds (15,000 rpm). This construction also provides superior resistance to wear and operates effectively across a wide temperature range (-30°C to 110°C).
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and guidance at high speeds, contributing to smooth operation and reduced vibration.
- Precision Engineering & Preload: Manufactured to P4A tolerance class with an Extra Light (Class A) preload, this bearing delivers minimal runout and high rotational accuracy, ensuring optimal performance in precision applications.
- Universal Matching (SU): Designed as a universal matchable bearing, two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to accommodate complex load conditions and provide enhanced system rigidity.
7018 ACEGA/HCP4AL Bearing Typical Application Areas
The 7018 ACEGA/HCP4AL is engineered for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging devices.
- High-Frequency Motors and Spindles: Where extreme rotational accuracy and low heat generation are critical.
