7018 ACEGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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7018 ACEGB/P4A Bearing Product Overview & Core Advantages
The 7018 ACEGB/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and superior running accuracy. Operating under a Light preload (Class B) and manufactured to P4A tolerance class, this bearing delivers exceptional rotational precision and stability. Its 25° contact angle is optimized to support significant combined loads, handling both radial and axial forces efficiently. The phenolic resin cage and high-grade chrome steel construction contribute to its reliable performance in demanding, high-speed environments.
7018 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7018 | Basic bearing designation (90mm bore, 140mm OD) | Defines the core bearing dimensions |
| AC | Angular Contact design | Optimized for combined load capacity |
| EGB | Universal Matchable (SU designation) | Enables precise bearing pairing for duplex sets |
| P4A | High precision tolerance class | Ensures exceptional running accuracy and minimal vibration |
7018 ACEGB/P4A Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The 25° contact angle and precisely sized chrome steel balls (11.112mm diameter) are engineered to provide superior axial load capacity while maintaining excellent radial load performance.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 15,000 rpm. The open design facilitates efficient lubrication distribution.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications demanding high rotational accuracy.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be precisely paired in various configurations (DB, DF, DT) to create optimized bearing arrangements for specific application requirements.
7018 ACEGB/P4A Bearing Typical Application Areas
Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes requiring high rigidity and minimal thermal growth.
Precision Industrial Equipment: High-speed pumps, compressors, and gearboxes where combined load capacity and running accuracy are critical.
Robotics and Automation: Robot arm joints, rotary tables, and precision positioning systems demanding high precision and reliability.
Aerospace and Defense: Gyroscopes, radar systems, and aircraft instrumentation requiring precision bearings with consistent performance under varying operational conditions.
