71948 CD/P4A
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
71948 CD/P4A Bearing Product Overview & Core Advantages
The 71948 CD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant combined loads, primarily thrust loads in one direction, with a 15° contact angle that optimizes performance. Its key advantages include high rigidity, availability with preload for reduced axial play, and a phenolic resin cage that contributes to smooth operation at high speeds.
71948 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71948 | Basic bearing series and size designation | Defines the core dimensions: 240mm bore, 320mm OD, 38mm width. |
| CD | High contact angle (15°) and optimized internal design | Enhances thrust load capacity and provides high rigidity. |
| P4A | Tolerance class equivalent to ABEC-7 | Guarantees extremely tight dimensional and running accuracy for precision applications. |
71948 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The optimized 15° contact angle and robust construction using chrome steel rings and balls enable this bearing to support high combined loads (radial and axial), making it exceptionally rigid.
High-Speed Performance: The lightweight phenolic resin cage ensures stability and low friction at high rotational speeds, contributing to the bearing's limiting speed of 6,000 rpm.
Precision and Preload: Manufactured to P4 tolerance class, it offers minimal runout and vibration. The availability of preload options allows for precise axial positioning and increased system stiffness.
Material Quality: Components made from high-grade chrome steel provide excellent wear resistance and durability, ensuring a long service life under demanding conditions.
71948 CD/P4A Bearing Typical Application Areas
The 71948 CD/P4A is ideally suited for high-performance machinery where precision and reliability are paramount. Key application areas include:
- Machine Tool Spindles (e.g., grinding, milling, and lathe spindles)
- High-Frequency Motors and Spindle Drives
- Precision Gearboxes and Robotic Arms
- Aerospace Positioning Systems
- Medical Imaging Equipment (e.g., CT scanner gantries)
