S71910 ACD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71910 ACD/P4ADBC Bearing Product Overview & Core Advantages
The S71910 ACD/P4ADBC is a precision duplex pair of double row angular contact ball bearings, pre-matched in a back-to-back (DB) arrangement. Engineered to the exacting P4A tolerance class, this assembly delivers exceptional rotational accuracy and high rigidity. Its design is optimized to handle significant combined loads—simultaneous radial and bidirectional axial loads—making it an ideal, compact solution for high-precision, high-reliability applications requiring superior running stability.
S71910 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| S71910 | Basic bearing designation (50mm bore, 72mm OD, 24mm width) | Defines the core bearing dimensions. |
| ACD | Angular Contact, Duplex pair in Back-to-Back arrangement with Moderate (Class C) preload | Ensures high rigidity and optimal moment load capacity. The preload enhances shaft positioning accuracy. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance in precision machinery. |
| DBC | Matched set designation for Duplex Back-to-Back arrangement | Indicates the bearings are factory-matched as a set (Number of bearings in matched set: 2) for immediate installation and guaranteed performance. |
S71910 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a robust, statically determinate bearing system. This configuration provides exceptional high rigidity and can withstand significant combined loads, including moment loads, making it far more stable than single bearings or other arrangements.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures minimal runout and vibration. The lightweight phenolic cage and optimized internal geometry contribute to its high limiting speed of 34,000 rpm, qualifying it as a true high-speed bearing.
Sealed & Pre-Lubricated Design: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate use. This design offers long-term, maintenance-free operation within its specified temperature range of -30°C to 110°C.
S71910 ACD/P4ADBC Bearing Typical Application Areas
The S71910 ACD/P4ADBC is engineered for demanding applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: Centrifuges and dental handpieces.
- Robotics: High-precision joints and arm assemblies.
