S7018 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7018 CD/P4ADBA Bearing Product Overview & Core Advantages
The S7018 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined loads, including significant radial loads and bidirectional axial loads. Manufactured to the stringent P4A tolerance class and featuring a phenolic cage, it is engineered for high-speed operation and reliable performance in precision machinery.
S7018 CD/P4ADBA 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. |
| D | Indicates a duplex (two-bearing) set. |
| DB | Back-to-Back arrangement for high moment rigidity. |
| P4A | Precision tolerance class for running accuracy and dimensional stability. |
| A | Extra light preload for minimal friction and optimal high-speed performance. |
S7018 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing high rigidity. This design enables it to handle substantial combined radial and axial loads from both directions simultaneously.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the 15° contact angle and extra light preload minimize heat generation, collectively enabling a high limiting speed of 15,000 rpm.
Precision & Longevity: Manufactured to ABEC 7 / P4A precision standards with tight dimensional tolerances, this bearing ensures smooth, quiet, and accurate operation. The phenolic cage and pre-greased design contribute to reliable, long-term performance.
S7018 CD/P4ADBA Bearing Typical Application Areas
The S7018 CD/P4ADBA is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints
