71910 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71910 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71910 ACD/P4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As part of a universally matchable (SU) set, it excels in machine tool spindles and other precision equipment where exceptional rotational accuracy and dimensional stability are paramount. Its key advantages include the ability to handle combined loads efficiently, superior running accuracy from its P4A tolerance class, and reliable high-speed performance enabled by its phenolic cage and optimized internal geometry.
71910 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation. |
| AC | 25° contact angle, optimized for high axial load capacity. |
| D | Specifies a universally matchable (SU) bearing, allowing for flexible mounting arrangements in pairs. |
| P4A | Indicates a super-precision tolerance class, with enhanced running accuracy for spindle applications. |
| DGA | Signifies the bearing is lubricated and part of a pre-determined universal matched set. |
71910 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with a 25° contact angle is engineered to support significant combined radial and axial loads simultaneously. When mounted in a universal pair (DB or DF arrangement), the bearing set provides high axial and moment rigidity, which is critical for maintaining precision under load.
Super-Precision & High-Speed Performance: Manufactured to P4A tolerance standards, this bearing guarantees minimal runout and vibration. The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces at the limiting speed of 46,000 rpm, making it ideal for high-speed spindles.
Optimized Internal Geometry: With 25 precision balls of 6.35 mm diameter, the bearing offers a high load rating and smooth motion transmission. The extra light preload (Class A) minimizes deflection at high speeds without generating excessive heat.
Material & Lubrication: Constructed from high-grade chrome steel for both rings and balls, the bearing ensures durability and a long service life. It comes pre-lubricated for immediate use within its specified temperature range of -30°C to 110°C.
71910 ACD/P4ADGA Bearing Typical Application Areas
The 71910 ACD/P4ADGA is predominantly used in high-precision, high-speed machinery, including:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Instrumentation
- Aerospace & Defense Systems
- High-Speed Robotic Drives
