71906 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71906 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71906 ACD/P4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and Extra Light (Class A) preload for superior rotational precision and minimal deflection. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs, providing high system rigidity. Manufactured to P4A tolerance class, it delivers outstanding running accuracy, making it ideal for high-speed spindle applications and other precision machinery.
71906 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation (30mm bore, 47mm OD, 18mm width) |
| AC | Angular Contact design with 25° contact angle |
| D | High precision bearing design |
| P4A | High precision tolerance class (geometric and running accuracy) |
| DGA | Universal matchable bearing pair, preloaded |
71906 ACD/P4ADGA Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
High-Speed Capability: Features a phenolic resin cage that reduces centrifugal forces and friction, enabling high-speed operation up to 83,000 rpm. The optimized ball quantity (20) and ball diameter (4.762mm) provide balanced performance.
Superior Rigidity: The 25° contact angle and extra light preload configuration deliver high system stiffness, minimizing deflection under combined loads.
Premium Materials: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and durability throughout the temperature range (-30°C to 110°C).
Universal Matching: The SU designation allows for flexible mounting in pairs (back-to-back, face-to-face, or tandem) without additional adjustment, simplifying installation and maintenance.
71906 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles
- High-Speed Motors: CNC spindle drives, electric motor applications
- Precision Instruments: Measuring equipment, optical instruments
- Robotics: High-accuracy robotic joints and actuators
- Aerospace Components: Guidance systems, precision mechanisms
- Medical Equipment: Dental handpieces, surgical tools
