71944 CD/P4ADBD
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
71944 CD/P4ADBD Bearing Product Overview & Core Advantages
The 71944 CD/P4ADBD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement provides superior stiffness and the ability to withstand combined loads, including significant radial and bidirectional axial loads. Manufactured to P4A tolerance class with a heavy preload (Class D), it ensures minimal runout and optimal performance in high-precision machinery. Its robust construction and phenolic cage make it suitable for high-speed operation up to 11,000 rpm.
71944 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series, indicating a metric angular contact ball bearing with a 220 mm bore, 300 mm OD, and 76 mm width. |
| C | Designates a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates a duplex back-to-back (DB) arrangement of two matched bearings. |
| P4A | Specifies a high-precision tolerance class with enhanced dimensional and running accuracy. |
| DB | Reinforces the duplex back-to-back mounting configuration for increased moment rigidity. |
71944 CD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back design creates a rigid bearing system that effectively resists moment loads. With a 15° contact angle and heavy preload, it delivers exceptional performance under combined radial and axial loads (Dynamic: 80,550 lbf, Static: 135,000 lbf).
- Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring precise shaft positioning and smooth operation in critical applications.
- High-Speed Capability: The phenolic cage and optimized internal geometry enable reliable operation at limiting speeds of 11,000 rpm, making it suitable for high-speed spindles and machinery.
- Durable Construction: Made from chrome steel for both rings and balls, providing excellent wear resistance and longevity. The open design allows for customized lubrication schemes to match specific operational requirements.
71944 CD/P4ADBD Bearing Typical Application Areas
This precision duplex bearing is ideally suited for applications demanding high rigidity, accuracy, and speed:
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: Where superior stiffness and rotational accuracy are critical
- Precision Gearboxes and transmission systems
- Industrial Pumps and Compressors requiring reliable bearing performance
- Robotics and Automation equipment with high positioning accuracy demands
