7018 ACD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7018 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7018 ACD/P4ADGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision. Its universal matchable (SU) design allows for flexible mounting in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements, enabling optimal performance for specific load conditions. The combination of a phenolic cage, 25° contact angle, and light preload (Class B) makes it an ideal solution for high-speed spindles and other precision machinery where high rigidity and minimal deflection are critical.
7018 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | 25° Contact Angle, Universal Matchable Design | Optimized for combined radial and axial loads, providing versatile mounting configurations |
| P4A | High Precision Tolerance Class | Ensures exceptional running accuracy and minimal vibration for precision applications |
| DGB | Light Preload (Class B) | Provides high rigidity while maintaining smooth operation at high speeds |
7018 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double-row angular contact design provides superior stiffness, enabling the bearing to handle significant combined loads (radial and axial) simultaneously. With a radial dynamic load rating of 27,225 lbf and static load rating of 32,175 lbf, it offers reliable performance under demanding operating conditions.
High-Speed Performance: The phenolic resin cage ensures excellent dimensional stability and reduced friction at high rotational speeds, supporting a limiting speed of 16,000 rpm. The optimized internal geometry and 25° contact angle contribute to stable operation at elevated speeds.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore diameter: 90 mm, outside diameter: 140 mm, width: 48 mm), this bearing guarantees consistent performance and interchangeability. The chrome steel construction of rings and balls ensures durability and long service life.
7018 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling applications
- High-Speed Motors: Electric spindles, servo motors, and precision drive systems
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- Industrial Pumps & Compressors: High-speed centrifugal pumps and compressor systems
- Robotics & Automation: Precision robotic joints, CNC rotary tables, and automated positioning systems
