S7008 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7008 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7008 ACDGA/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This single-row bearing features an Extra Light (A) preload and a P4A tolerance class, making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to support high combined loads (radial and axial) simultaneously, while its phenolic cage and grease lubrication enable superior high-speed performance and reliable operation.
S7008 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 15mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| DGA | Universal Matchable (SU) bearing, supplied in a set of 4 bearings for precise preload matching. |
| P4A | Indicates a super-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
S7008 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The P4A tolerance class and extra light preload ensure minimal runout and high system stiffness, critical for maintaining accuracy under load.
Superior Load Capacity: The 25° contact angle and optimized internal geometry provide excellent capability for handling combined radial and axial loads.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the pre-applied grease lubrication contributes to a high limiting speed of 41,000 rpm.
Universal Matching Design: The DGA suffix signifies that the bearings are universally matchable, allowing for flexible mounting arrangements (DB, DF, DT) to achieve the required preload and rigidity without selective assembly.
S7008 ACDGA/P4A Bearing Typical Application Areas
The S7008 ACDGA/P4A is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Medical and Laboratory Equipment: Centrifuges and precision instruments.
