71944 ACD/P4AQBTA
71900 Series Super Precision Angular Contact Ball Bearings
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71944 ACD/P4AQBTA Bearing Product Overview & Core Advantages
The 71944 ACD/P4AQBTA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This quadruplex matched set features an Extra Light preload (Class A) and is arranged in a Tandem Back-to-Back (QBT) configuration, enabling it to handle significant combined loads while maintaining high system stability. Manufactured to a P4A tolerance class, it delivers superior running accuracy, making it ideal for high-speed, high-precision machinery where uncompromising performance is critical.
71944 ACD/P4AQBTA Bearing Model Code Explained, Specifications & Naming Convention
- 71944: Basic bearing series, indicating a high-precision angular contact bearing with a 220 mm bore.
- ACD: Signifies Angular Contact design with a 25° contact angle.
- P4A: Denotes the tolerance class, specifying very high dimensional and running accuracy.
- QB: Indicates the bearing is part of a Quadruplex (4-bearing) matched set.
- T: Specifies the Tandem Back-to-Back (QBT) arrangement for optimized load distribution.
- A: Identifies the Extra Light preload (Class A) for minimal friction at high speeds.
71944 ACD/P4AQBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex matched set in a Tandem Back-to-Back configuration creates an exceptionally rigid bearing system, capable of supporting high radial and axial loads simultaneously. The 25° contact angle is optimized for sustaining substantial thrust loads.
Precision & Speed Performance: Built to P4A tolerance standards, this bearing ensures minimal runout and vibration. The phenolic cage and optimized internal geometry contribute to a high limiting speed of 11,000 rpm, suitable for high-speed applications.
Superior Material & Construction: Components made from chrome steel provide high durability and fatigue resistance. The set comes pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71944 ACD/P4AQBTA Bearing Typical Application Areas
This bearing is engineered for high-performance applications in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Speed Drives.
- Industrial Pumps and Compressors.
- Aerospace Actuation Systems and Robotic Rotary Joints.
