71948 CD/P4ADBA
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
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71948 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71948 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) matched set features an Extra Light (A) preload and adheres to the stringent P4A tolerance class, ensuring superior running accuracy and minimal axial and radial runout. Its primary advantage lies in its ability to handle combined loads—significant radial forces alongside thrust loads in both directions—making it ideal for high-precision, high-rigidity spindles and systems where rotational stability is paramount.
71948 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71948 | Basic bearing designation, indicating a metric, angular contact type. |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a Duplex (DB) Back-to-Back matched set. |
| P4A | Specifies the tolerance class, denoting very high precision levels for both dimensional and running accuracy. |
| DB | Confirms the Back-to-Back arrangement of the two matched bearings, which provides high moment rigidity. |
| A | Specifies an Extra Light preload within the matched set, minimizing friction and heat generation for high-speed applications. |
71948 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability under heavy combined loads.
Superior Load Capacity: With a dynamic load rating of 83,475 lbf and a static load rating of 144,000 lbf, this bearing set is engineered to handle significant radial and bidirectional axial forces, providing reliable performance in demanding conditions.
Optimized High-Speed Performance: The 15° contact angle and lightweight phenolic cage are key to its high-speed capability, contributing to a limiting speed of 7,500 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high rotational velocities.
Precision Engineering: Manufactured to P4A tolerance class with a preload class A, this bearing guarantees minimal runout and vibration, which is critical for applications requiring ultra-high precision and smooth rotation.
71948 CD/P4ADBA Bearing Typical Application Areas
The 71948 CD/P4ADBA is ideally suited for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Used in PCB drilling, engraving, and high-frequency motor spindles.
- Industrial Pumps & Compressors: Applications requiring robust support for combined loads at elevated speeds.
- Robotics and Automation: High-accuracy rotary joints and arm assemblies.
