S7018 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7018 ACE/P4A Bearing Product Overview & Core Advantages
The S7018 ACE/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle and is supplied with a preload, enabling it to handle combined loads (radial and axial) simultaneously with high stability. Manufactured to P4 (ABEC-7) tolerance, it guarantees superior running accuracy, making it an ideal choice for high-speed and high-reliability spindles and precision machinery.
S7018 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Basic bearing series and size designation (90mm bore, 140mm OD). |
| ACE | Internal design code, typically indicating optimized internal geometry and a 25° contact angle. |
| P4A | Denotes a high-precision tolerance class (P4 / ABEC-7) and that the bearing is supplied with a specific preload grade (A). |
S7018 ACE/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The optimized internal geometry, 25° contact angle, and applied preload work in unison to provide exceptional system stiffness, minimizing deflection under load and ensuring precise shaft positioning. The P4 tolerance ensures minimal runout and smooth operation.
Superior Load Capacity: The angular contact design is engineered to support significant combined radial and axial loads in one direction efficiently. With a dynamic load rating of 7605 lbf and a static load rating of 6750 lbf, it offers reliable performance in demanding applications.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the high-grade lubricant and precision construction contribute to a high limiting speed of 12,000 rpm, making it suitable for high-speed spindles.
Sealed and Lubricated for Life: As a sealed and lubricated unit, the bearing is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S7018 ACE/P4A Bearing Typical Application Areas
The S7018 ACE/P4A is ideally suited for high-performance machinery where precision and speed are critical. Key applications include:
- Machine Tool Spindles (milling, grinding, turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes
- Robotic Drives and Rotary Actuators
- Medical and Laboratory Equipment
