71906 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71906 CDGA/P4A Bearing Product Overview & Core Advantages
The 71906 CDGA/P4A is a single-row angular contact ball bearing designed for applications demanding ultra-high precision and exceptional rotational accuracy. Manufactured to P4A tolerance class with an Extra Light (Class A) preload, this bearing delivers superior running accuracy, minimal vibration, and excellent high-speed capability. Its 15° contact angle is optimized to handle combined loads, efficiently supporting significant axial loads in one direction alongside radial loads. The universal matching (SU) designation allows for flexible mounting arrangements in pairs to accommodate complex load requirements. Ideal for high-precision spindles and other critical machinery where positional accuracy and rigidity are paramount.
71906 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD, 9mm width) | Defines core bearing dimensions and internal geometry |
| C | 15° nominal contact angle | Optimized for combined load capacity with axial load emphasis |
| DG | Universal matching bearing designation | Enables flexible pairing (DB, DF, DT arrangements) for increased rigidity |
| A | Extra Light preload (Class A) | Minimizes deflection under light loads, enhances positioning accuracy |
| P4A | High precision tolerance class | Superior dimensional and running accuracy for precision applications |
71906 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring exceptional running accuracy and minimal runout for high-precision applications.
Optimized Internal Geometry: Features a 15° contact angle that provides an ideal balance between radial and axial load capacity, making it particularly effective for applications with significant thrust loads.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's impressive limiting speed of 100,500 rpm.
Enhanced Rigidity: The Extra Light preload (Class A) reduces internal clearance, providing increased system stiffness without generating excessive heat, crucial for maintaining precision under operational loads.
Superior Material Quality: Constructed from chrome steel for both rings and balls, ensuring high hardness, wear resistance, and long service life in demanding applications.
71906 CDGA/P4A Bearing Typical Application Areas
Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes where ultra-high precision and minimal runout are critical.
Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus requiring exceptional rotational accuracy.
High-Speed Motors: Servo motors, spindle motors, and other high-RPM electric motors where balanced performance at elevated speeds is essential.
Aerospace Components: Gyroscopes, navigation systems, and other aerospace mechanisms demanding reliable performance in precision positioning applications.
Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems where smooth, precise rotation is mandatory.
