S7011 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7011 ACD/P4A Bearing Product Overview & Core Advantages
The S7011 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and rigidity. Operating under P4 (ABEC-7) tolerance class, this bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 25° contact angle for optimal performance. Its sealed design and factory-applied lubrication ensure long-term reliability and minimal maintenance, making it an ideal choice for high-speed spindles and other precision machinery where accuracy and durability are paramount.
S7011 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance |
|---|---|---|
| S7011 | Basic bearing series and size designation | Indicates a metric, 55mm bore, 90mm OD, 18mm width bearing. |
| AC | Angular Contact design | Optimized for combined radial and axial loads. |
| D | High Contact Angle (25°) | Provides superior axial load capacity. |
| P4A | Precision Tolerance Class (ABEC-7) | Ensures extremely tight dimensional and running accuracy for high-precision applications. |
S7011 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row design with a 25° contact angle and phenolic cage provides excellent rigidity, enabling the bearing to handle significant combined loads (Radial Dynamic: 8348 lbf, Static: 6975 lbf) with high stability.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 14,000 rpm. The optimized internal geometry further enhances high-speed capability.
- Precision & Accuracy: Manufactured to P4 (ABEC-7) tolerance standards, this bearing guarantees minimal runout and vibration, which is critical for the accuracy of machine tool spindles.
- Sealed & Lubricated for Life: The integral seals protect against contamination, and the factory-applied lubrication is suitable for a wide temperature range (-30°C to 110°C), offering a maintenance-free solution.
S7011 ACD/P4A Bearing Typical Application Areas
The S7011 ACD/P4A is ideally suited for high-performance applications requiring precision and speed, including:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Gearboxes
- Robotic Arms and Joints
- Medical and Dental Equipment Spindles
