S71930 ACDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71930 ACDGB/P4A Bearing Product Overview & Core Advantages
The S71930 ACDGB/P4A is a precision double-row angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads from both directions, this bearing features a compact design that saves space while delivering superior operational reliability. Its P4A super-precision tolerance and optimized internal geometry ensure smooth, quiet operation, making it ideal for demanding, high-speed machinery where minimal vibration and maximum precision are critical.
S71930 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings |
| 1930 | Standardized size code: 150mm bore, 210mm OD, 28mm width |
| AC | 25° contact angle, optimized for axial load capacity |
| DGB | Universal Matchable (SU) bearing set, supplied as a matched pair (2 bearings) |
| P4A | Tolerance class exceeding ABEC 7/ISO P4, ensuring ultra-precise running accuracy |
S71930 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double-row design provides significantly increased radial and moment load stiffness compared to single-row bearings. With a 25° contact angle and optimized raceway geometry, it efficiently supports substantial combined loads, making it exceptionally stable under complex force conditions.
Precision & Speed Performance: The phenolic resin cage offers excellent guidance, low friction, and high-speed capability, contributing to the bearing's limiting speed of 11,000 rpm. The P4A tolerance class guarantees minimal runout and vibration, which is paramount for precision spindles.
Sealed & Pre-Lubricated for Longevity: As a sealed bearing pre-filled with grease, it is protected from contamination and is effectively maintenance-free for its entire service life within the specified temperature range of -30°C to 110°C.
S71930 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Gearboxes: Applications demanding high positional accuracy and smooth torque transmission.
- High-Frequency Motors & Spindles: Where low vibration and high rotational speeds are critical.
- Industrial Pumps & Compressors: For reliable performance under combined radial and axial loads.
- Robotic Arms and Precision Automation: Providing accurate, repeatable motion control.
