7218 ACDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7218 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7218 ACDGB/P4A is a premium single-row angular contact ball bearing designed for applications requiring exceptional precision and performance. Engineered to accommodate combined loads with high axial load capacity in one direction, this bearing features a 25° contact angle and Universal Matchable (SU) design, allowing for precise preloaded arrangements. Manufactured to P4A tolerance class, it delivers superior running accuracy, making it ideal for high-speed operation and demanding industrial environments where reliability is critical.
7218 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7218 | Standard bore diameter (90 mm) and dimension series |
| AC | Angular Contact design with 25° contact angle |
| DGB | Universal Matchable (SU) bearing for duplex arrangements |
| P4A | High precision tolerance class superior to ABEC 7 |
7218 ACDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal runout and vibration, critical for applications requiring smooth operation at high speeds up to 17,000 rpm.
Optimized Load Capacity: With a 25° contact angle and robust construction featuring 16 chrome steel balls of 22.225 mm diameter, this bearing delivers exceptional radial dynamic load rating of 27,225 lbf and static load capacity of 23,850 lbf.
High-Speed Performance: The phenolic cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at limiting speeds while maintaining dimensional stability across the temperature range of -30°C to 110°C.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be precisely paired with other identical bearings to create preloaded sets of 3 bearings, ensuring optimal stiffness and minimal axial play in demanding applications.
7218 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and CNC equipment
- Precision Grinding Spindles - Applications requiring extreme running accuracy
- High-Speed Motors - Industrial motors and servo drives
- Aerospace Components - Critical rotating assemblies in aircraft systems
- Medical Equipment - CT scanners and high-speed medical imaging devices
- Robotics - Precision joints and articulation points
