S7018 CDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7018 CDGC/P4A Bearing Product Overview & Core Advantages
The S7018 CDGC/P4A is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This single bearing features a 15° contact angle and is manufactured to P4A super-precision tolerance class, ensuring minimal runout and superior rotational accuracy. Its key advantage lies in its ability to handle combined loads (radial and axial) efficiently while maintaining high-speed capabilities. The phenolic cage and pre-lubrication with grease contribute to its smooth operation and long service life, making it an ideal choice for high-performance machinery where reliability is paramount.
S7018 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Basic bearing series, indicating a metric size with 90mm bore, 140mm OD, and 24mm width. |
| CD | Designates a 15° contact angle and Moderate (Class C) preload for optimized rigidity and running accuracy. |
| GC | Indicates the bearing is Universal Matchable (SU), allowing for precise pairing in sets (2 bearings) to achieve specific preload or tolerance requirements. |
| P4A | Specifies the tolerance class, representing super-precision levels with extremely tight dimensional and running accuracy tolerances. |
S7018 CDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle and Moderate preload (Class C) provide excellent resistance to deflection under combined radial and axial loads, ensuring stable operation and positioning accuracy.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 15,000 rpm. This makes it suitable for high-speed spindles and rotating assemblies.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing guarantees minimal vibration and superior running precision for critical applications.
- Optimized Lubrication & Sealing: The bearing is pre-lubricated with grease and is sealed, protecting against contamination and providing maintenance-free operation within its specified temperature range (-30°C to 110°C).
- Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be precisely paired with another identical bearing to form a matched set, simplifying installation and achieving desired preload conditions without selective mounting.
S7018 CDGC/P4A Bearing Typical Application Areas
The S7018 CDGC/P4A is engineered for high-precision, high-speed machinery across various industries. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Instruments: Measuring equipment, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Motors & Drives: Servo motors, spindle drives, and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotational mechanisms.
- Medical Equipment: Dental handpieces, centrifuges, and advanced imaging devices.
