S71907 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71907 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S71907 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied as a Universal Matchable (SU) set of four, allowing for precise preload configuration in complex arrangements. Its core advantages include superior high-speed capability with a limiting speed of 56,000 rpm, enabled by a lightweight phenolic cage and ceramic balls. Manufactured to a P4A tolerance class, it delivers extreme dimensional stability and running accuracy, making it ideal for applications where high rigidity and minimal runout are critical.
S71907 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (Corrosion Resistant) Bearing Ring Material |
| 7 | Angular Contact Ball Bearing |
| 1907 | Standardized Size Code (35mm Bore, 55mm OD, 10mm Width) |
| AC | 25° Contact Angle |
| DGA | Designates a Universal Matchable (SU) bearing for duplex sets |
| HC | Hybrid Ceramic (Ceramic Balls with Steel Rings) |
| P4A | High-Precision Tolerance Class (Superior to ABEC 7) |
S71907 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at high speeds. This construction also offers enhanced resistance to electrical arcing.
- Phenolic Cage: The lightweight and robust phenolic resin cage contributes to lower vibration, quieter operation, and excellent performance at high rotational speeds.
- Extra Light Preload (Class A): This preload grade ensures minimal starting and running torque while providing high axial and radial stiffness, resulting in precise shaft positioning and reduced system vibration.
- Universal Matching (SU): Supplied as a set of four bearings with selectively graded internal clearances, allowing for flexible mounting in back-to-back, face-to-face, or tandem arrangements to achieve the desired preload and rigidity.
- Sealed & Grease-Lubricated: The integral seals protect against contamination and retain the high-performance grease, enabling maintenance-free operation throughout the bearing's service life within the specified temperature range (-30°C to 110°C).
S71907 ACDGA/HCP4A Bearing Typical Application Areas
The S71907 ACDGA/HCP4A is designed for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers.
- Precision Robotics: Arm joints and high-accuracy gearboxes.
- Medical & Dental Equipment: High-speed handpieces and scanner spindles.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and avionics cooling fans.
- Semiconductor Manufacturing Equipment: Wafer handling robots and precision stages.
