7018 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7018 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7018 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This back-to-back (DB) matched pair configuration is engineered to simultaneously handle combined radial and axial loads from both directions. With a P4A tolerance class and a moderate preload (Class C), it delivers superior running accuracy and stability, making it ideal for high-speed, high-precision machinery where reliable performance is critical.
7018 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for combined loads. |
| P4A | High precision tolerance class for exceptional dimensional and running accuracy. |
| DB | Duplex Back-to-Back arrangement, providing high rigidity and moment load capacity. |
| C | Moderate preload class for optimal stiffness and minimal deflection under load. |
7018 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The back-to-back duplex arrangement creates a wide effective spread, significantly enhancing system rigidity and enabling the bearing to withstand substantial combined loads and moment loads. The 25° contact angle further optimizes axial load carrying capability.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures smooth operation and low vibration at high speeds, with a limiting speed of 16,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and is suitable for high acceleration applications.
Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue life and wear resistance. It comes pre-lubricated for immediate use and operates effectively within a temperature range of -30°C to 110°C.
7018 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Speed Precision Spindles in PCB drilling and routing equipment
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
- Medical and Laboratory Equipment requiring high rotational accuracy
