S7018 CD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7018 CD/P4ADBB Bearing Product Overview & Core Advantages
The S7018 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched set features a back-to-back (DB) arrangement and a P4A tolerance class, making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously from both directions, providing a compact, high-performance solution for complex load scenarios.
S7018 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Basic bearing series, indicating a 90mm bore, 140mm OD, and 48mm width. |
| C | 15° contact angle, optimized for high axial load capacity. |
| D | Duplex bearing (two single bearings paired). |
| P4A | High precision tolerance class for superior running accuracy. |
| DB | Back-to-Back arrangement, providing high moment rigidity. |
| Sealed / Grease | Integral seals and factory-applied grease for long-term, maintenance-free operation. |
S7018 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and tilting. This configuration, combined with the 15° contact angle, provides excellent capacity for combined radial and bidirectional axial loads.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and reduces friction, enabling stable operation at the high limiting speed of 15,000 rpm. The optimized internal geometry further enhances high-speed capability.
Precision & Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration for superior positional accuracy. The integral sealing and pre-lubrication with high-quality grease protect against contamination and provide reliable performance across a wide temperature range from -30°C to 110°C.
S7018 CD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme running accuracy.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Industrial Pumps & Compressors: For handling significant axial and radial loads.
