71906 ACD/P4ATGB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71906 ACD/P4ATGB Bearing Product Overview & Core Advantages
The 71906 ACD/P4ATGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. As a universal matchable (SU) bearing with P4A tolerance class, it delivers superior rotational precision and dimensional stability. Its key advantage lies in its ability to handle combined loads—simultaneously supporting significant radial and axial loads—thanks to its 25° contact angle. The phenolic cage and light preload (Class B) contribute to its excellent high-speed performance, making it ideal for precision spindles and other high-rotation machinery.
71906 ACD/P4ATGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with 25° contact angle |
| P4A | High precision tolerance class with enhanced running accuracy |
| TGB | Pre-lubricated with high-performance grease |
71906 ACD/P4ATGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design and universal matching capability enable the bearing to withstand substantial combined radial and axial loads. When mounted in sets, these bearings provide exceptional system rigidity and load distribution.
High-Speed Performance: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high rotational speeds, contributing to the bearing's impressive limiting speed of 83,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore diameter tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing delivers high durability and wear resistance, while the phenolic cage provides dimensional stability across the operating temperature range (-30°C to 110°C).
71906 ACD/P4ATGB Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Spindle motors and high-frequency applications
- Aerospace Components - Guidance systems and precision mechanisms
- Medical Equipment - Dental handpieces and surgical tools
