71944 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71944 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71944 CD/P4ADBA is a precision angular contact ball bearing configured as a duplex back-to-back (DB) pair, delivering exceptional performance in demanding applications. Engineered to a P4A tolerance class, it offers superior running accuracy and rotational stability. This matched set is designed to handle combined loads—significant radial loads and axial loads in both directions—simultaneously. The extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed operation up to 11,000 rpm. Its robust construction ensures high rigidity and precise shaft positioning, which is critical for machine tool spindles and other high-precision machinery.
71944 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing designation, indicating a high-precision angular contact bearing series. |
| C | Indicates a 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Signifies the bearing is part of a duplex pair. |
| DB | Specifies the back-to-back arrangement of the duplex pair, which provides high moment rigidity. |
| P4A | Denotes an ultra-precision tolerance class with enhanced dimensional and running accuracy requirements. |
71944 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases the bearing's resistance to moment loads and tilting, providing exceptional rigidity. This configuration enables the bearing set to handle substantial combined radial and axial loads from both directions simultaneously.
High-Speed Performance: Featuring a lightweight phenolic resin cage, this bearing minimizes centrifugal forces and friction, enabling stable operation at the high limiting speed of 11,000 rpm. The 15° contact angle is specifically chosen to reduce heat generation at high rotational speeds.
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and superior rotational accuracy. The extra light preload eliminates internal clearance, ensuring precise shaft positioning and smooth, quiet operation under high-speed conditions.
71944 CD/P4ADBA Bearing Typical Application Areas
The 71944 CD/P4ADBA is ideally suited for high-precision, high-speed applications requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Frequency Motor Spindles
- Precision Gearboxes
- Aerospace & Defense Positioning Systems
- Medical Equipment & Dental Handpieces
