S7018 ACD/P4ATBTC
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S7018 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The S7018 ACD/P4ATBTC is a precision angular contact ball bearing configured in a Triplex Back-to-Back (TBT) matched set. Engineered for the most demanding applications, this arrangement delivers exceptional system rigidity and stability under complex loading conditions. Its P4A tolerance class ensures ultra-high running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and precise positioning are critical. The phenolic cage and preloaded design contribute to smooth, quiet operation at high rotational speeds.
S7018 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Bearing series and size designation (90mm bore, 140mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| TBT | Triplex Back-to-Back matched set arrangement, consisting of three bearings. |
| C | Moderate preload class for optimal stiffness and speed performance. |
S7018 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The Triplex Back-to-Back (TBT) configuration provides maximum resistance to moment loads and tilting, offering superior system rigidity. This design enables the bearing set to accommodate significant combined loads (radial and axial) from both directions simultaneously.
High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction, which is crucial for achieving high limiting speeds (15,000 rpm). The 25° contact angle provides an optimal balance between axial load capacity and speed capability.
Precision and Accuracy: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing guarantees minimal runout and vibration for ultra-precise applications.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S7018 ACD/P4ATBTC Bearing Typical Application Areas
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-performance Industrial Pumps and Compressors
- Robotic Arm and CNC Rotary Tables requiring high moment stiffness
- Other precision machinery demanding the highest levels of rotational accuracy and rigidity
