71930 CD/P4ADFA
71900 Series Super Precision Angular Contact Ball Bearings
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71930 CD/P4ADFA Bearing Product Overview & Core Advantages
The 71930 CD/P4ADFA is a high-precision duplex angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This P4A tolerance class bearing features a Face-to-Face (DF) matched arrangement, providing superior stability and the ability to withstand combined radial and axial loads. With its extra light preload (Class A) and optimized 15° contact angle, it is engineered for high-speed operation and precise rotational performance in the most demanding industrial environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Bearing series and size designation (150mm bore, 210mm OD) |
| C | 15° contact angle design |
| D | Duplex arrangement (two bearings matched) |
| P4A | High precision tolerance class |
| DF | Face-to-Face mounting arrangement |
| A | Extra light preload classification |
71930 CD/P4ADFA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex face-to-face configuration creates a highly rigid bearing system capable of handling significant combined loads from multiple directions. This arrangement provides excellent moment load resistance and operational stability.
Precision Performance: Manufactured to P4A tolerance class standards with extra light preload, this bearing ensures minimal runout and vibration, making it ideal for applications requiring extreme rotational accuracy.
High-Speed Capability: The phenolic cage material and optimized 15° contact angle contribute to superior high-speed performance, with a limiting speed of 11,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing delivers exceptional durability and fatigue resistance under demanding operating conditions.
71930 CD/P4ADFA Bearing Typical Application Areas
The 71930 CD/P4ADFA is specifically engineered for high-precision applications including:
- Machine Tool Spindles - High-speed milling and grinding applications
- Precision Gearboxes - Industrial transmission systems requiring minimal backlash
- Robotic Systems - High-accuracy robotic arms and positioning systems
- Aerospace Components - Flight control systems and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
- Test & Measurement Equipment - Coordinate measuring machines and optical systems
