S71912 ACDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71912 ACDGB/P4A Bearing Product Overview & Core Advantages
The S71912 ACDGB/P4A is a super-precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. This sealed metric bearing features a Universal Matchable (SU) design, allowing bearings to be mounted in any combination without preload loss. Its core advantages include the ability to handle combined loads (radial and bidirectional axial loads) simultaneously, superior running accuracy from its P4A tolerance class, and reliable operation at high speeds up to 36,000 rpm, making it ideal for high-performance, high-reliability spindles and systems.
S71912 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| S7 | Bearing Series | Indicates a super-precision angular contact ball bearing series. |
| 1912 | Size Code | Specifies the bearing dimensions: 60mm bore, 85mm OD, 13mm width. |
| AC | Contact Angle | 25° contact angle, optimized for supporting high axial loads. |
| DGB | Universal Matching & Preload | "Universal Matchable" bearings with a Light (Class B) preload for high rigidity and immediate operational readiness. |
| P4A | Tolerance Class | Denotes a super-precision tolerance grade, ensuring minimal runout and vibration for ultra-smooth operation. |
S71912 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row angular contact design provides a rigid support system, enabling the bearing to sustain significant combined loads. With a 25° contact angle and two rows of balls, it offers robust axial load capacity in both directions.
Super-Precision Performance: Manufactured to P4A tolerance standards with a phenolic resin cage, this bearing achieves extremely low noise and vibration levels. This is critical for maintaining accuracy in high-speed applications.
High-Speed Capability: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 36,000 rpm, making it a true high-speed bearing.
Maintenance-Free Operation: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is lubricated for life within its specified temperature range (-30°C to 110°C), reducing maintenance needs.
S71912 ACDGB/P4A Bearing Typical Application Areas
The S71912 ACDGB/P4A is ideally suited for high-precision, high-speed machinery where uncompromising accuracy and rigidity are required. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Medical Equipment: Dental handpieces and small surgical tools.
- Robotics: High-accuracy joints and actuators.
