S7018 CD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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S7018 CD/P4ADBC Bearing Product Overview & Core Advantages
The S7018 CD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded (Moderate / Class C) to provide superior system stiffness and minimize axial and radial runout. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and stability under combined loads are critical.
S7018 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- S7018: Basic bearing series, indicating a 90mm bore, 140mm OD, and 48mm width.
- C: 15° contact angle, optimized for carrying combined radial and axial loads.
- D: Signifies a duplex back-to-back (DB) preloaded pair.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7 standards.
- DB: Confirms the matched arrangement as Back-to-Back.
- C: Indicates a moderate preload (Class C) for enhanced rigidity.
S7018 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid, moment-resistant bearing system, capable of supporting significant combined radial and axial loads from both directions. The defined preload eliminates internal clearance, increasing the bearing's natural frequency and reducing vibration.
Precision & High-Speed Performance: Manufactured to P4A tolerance standards, this bearing guarantees minimal runout and smooth operation. The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 15,000 rpm. The standard grease lubrication is suitable for the specified operating temperature range.
Durability & Reliability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life under high-stress conditions.
S7018 CD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables and indexing heads.
- High-Frequency Motors and spindle drives.
- Medical Equipment such as dental handpieces and CNC surgical devices.
- Aerospace instrumentation and control systems.
