S7006 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7006 ACD/P4A Bearing Product Overview & Core Advantages
The S7006 ACD/P4A is a high-precision, single-row angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is ideally suited for high-speed spindles and precision machinery. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and unidirectional axial loads—simultaneously. The bearing comes preloaded from the factory, eliminating internal clearance to provide high system stiffness and precise shaft positioning, making it a cornerstone for high-reliability, high-performance applications.
S7006 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Interpretation | Technical Significance |
|---|---|---|
| ACD | Angular Contact, 25° Contact Angle | Optimized for carrying high axial loads in one direction. The 25° contact angle provides an excellent balance between radial and axial load capacity. |
| P4A | P4 (ABEC-7) Tolerance Class, Preloaded | Denotes ultra-high precision bearings with extremely tight dimensional and running accuracy tolerances. The "A" suffix indicates a specific, light preload for maximum rigidity. |
S7006 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row design with a 25° contact angle and factory-applied preload ensures minimal deflection under load, providing exceptional stiffness and rotational accuracy critical for machine tool spindles.
- Superior Load Capacity: Engineered to handle combined radial and axial loads efficiently. The optimized raceway geometry and chrome steel construction contribute to its high dynamic (3105 lbf) and static (1721 lbf) load ratings.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 28,000 rpm. This makes it an ideal high-speed bearing for demanding applications.
- Sealed & Lubricated for Life: As a sealed bearing, it is protected from contaminants and comes pre-lubricated, offering a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S7006 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and high-frequency motor spindles.
- High-Speed Automation: Robotic arms and high-cycle rotary tables.
- Medical Equipment: Dental handpieces and small precision drives.
