S71918 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The S71918 ACDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This sealed bearing features a phenolic cage and is preloaded to Extra Light (Class A) specifications, ensuring smooth operation and minimal deflection under load. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high reliability, making it an ideal choice for high-speed spindles and precision machinery where dimensional stability is critical.
S71918 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series with enhanced performance characteristics.
- 1918: Standard size designation (90mm bore, 125mm OD, 18mm width).
- AC: Angular Contact design with a 25° contact angle.
- D: Two bearings in a Universal Matchable (SU) set.
- GA: Preload classification: Extra Light (Class A).
- P4A: Tolerance class equivalent to ABEC 7, indicating very high running accuracy.
Structural Features and Performance Benefits
High Rigidity and Precision: The angular contact design and Class A preload provide superior system stiffness, minimizing axial and radial play for exceptional positioning accuracy. Manufactured to a P4A tolerance class, it guarantees consistent high-performance operation.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling a high limiting speed of 15,000 rpm. The standard grease lubrication is formulated for stable operation across the specified temperature range.
Robust Load Capacity: With a dynamic load rating of 9945 lbf and a static load rating of 10800 lbf, this bearing is engineered to handle significant combined loads effectively.
Sealed and Protected: The integrated seals protect against contamination, preserving the bearing's precision and extending its service life in demanding environments.
S71918 ACDGA/P4A Bearing Typical Application Areas
The S71918 ACDGA/P4A is ideally suited for high-performance applications requiring high speed, high rigidity, and precision, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Industrial Pumps and Compressors
- Robotic Drives and Actuators
