71944 CD/P4ATBTA
71900 Series Super Precision Angular Contact Ball Bearings
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71944 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 71944 CD/P4ATBTA is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance under combined loads, handling significant radial and axial forces simultaneously. Manufactured to P4A tolerance class, it ensures ultra-precise rotational accuracy and minimal runout. Its extra light preload (Class A) minimizes deflection under high-speed operation, making it an ideal choice for high-precision, high-rigidity spindles and other critical machinery components.
71944 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series and size designation (220mm bore, 300mm OD). |
| CD | Indicates a specific internal design and 15° contact angle optimized for high-speed operation and rigidity. |
| P4A | Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
| TBT | Signifies a Triplex Back-to-Back matched arrangement of three bearings, providing maximum rigidity and moment load capacity. |
| A | Specifies an Extra Light Preload applied to the matched set, reducing deflection at high speeds without generating excessive heat. |
71944 CD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back configuration creates a highly rigid bearing system capable of withstanding heavy combined radial and axial loads as well as moment loads. This arrangement significantly increases system stability.
Precision Performance: The P4A tolerance class guarantees minimal dimensional variation and superior running accuracy, which is critical for applications requiring high positional repeatability and smooth operation.
Optimized High-Speed Operation: The 15° contact angle and phenolic cage contribute to lower friction and reduced centrifugal forces, enabling a high limiting speed of 11,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates effectively within the specified temperature range.
Superior Material Construction: Manufactured from chrome steel for both rings and balls, this bearing provides high fatigue life and durability under demanding operating conditions.
71944 CD/P4ATBTA Bearing Typical Application Areas
The 71944 CD/P4ATBTA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout at extreme rotational speeds.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
