71905 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71905 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71905 ACD/P4ADGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. As a universal matchable (SU) bearing supplied in a set of two, it enables simplified mounting and optimal preload configuration. Its key advantages include superior high-speed capability, excellent dimensional stability due to its P4A tolerance class, and the ability to accommodate combined radial and axial loads simultaneously, making it ideal for high-performance spindles and precision machinery.
71905 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing series designation |
| AC | 25° contact angle |
| D | High ball diameter and quantity for increased load capacity |
| P4A | Super-precision tolerance class (exceeds ABEC 7/ISO P4) |
| DGB | Universal Matchable (SU) bearing pair with Light preload (Class B) |
71905 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The optimized 25° contact angle and 18 high-precision chrome steel balls provide exceptional stiffness and enable the bearing to handle significant combined loads.
Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional control on the bore diameter, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and low friction at the high limiting speed of 53,000 rpm.
Universal Matchability: The Universal Matchable (SU) designation and supplied pair (DGB suffix) allow for flexible mounting in back-to-back, face-to-face, or tandem arrangements to achieve the desired preload and system rigidity without selective sorting.
71905 ACD/P4ADGB Bearing Typical Application Areas
This precision angular contact bearing is engineered for the most demanding high-speed and high-accuracy applications, including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Frequency Precision Spindles
- Robotic Arm Drives and Joints
- High-Speed Medical and Dental Handpieces
- Advanced Aerospace and Defense Instrumentation
