71948 ACD/P4ATBTC
71900 Series Super Precision Angular Contact Ball Bearings
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71948 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 71948 ACD/P4ATBTC is a high-precision angular contact ball bearing configured in a Triplex Back-to-Back (TBT) matched set. Engineered for applications demanding extreme rigidity and accuracy, this bearing arrangement excels at handling combined radial and axial loads simultaneously. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed, high-reliability machinery where preload control and system stiffness are critical performance factors.
71948 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
- 71948: Basic bearing series and size designation.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Indicates a high-precision tolerance class exceeding ABEC 7 standards, ensuring minimal runout and vibration.
- TBT: Specifies the bearing is supplied as a Triplex Back-to-Back matched set of three bearings, providing maximum moment stiffness.
- C: Denotes a Moderate preload (Class C) applied to the set, optimizing rigidity and rotational accuracy for the intended application.
71948 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The triplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined loads and significant moment loads. The 25° contact angle is optimized for sustaining substantial axial loads in both directions.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to stable operation at the bearing's limiting speed. The P4A precision and optimized internal geometry further enhance high-speed capability.
Precision and Durability: Manufactured from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The matched set is supplied pre-lubricated, ensuring immediate operational readiness and protection.
71948 ACD/P4ATBTC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for demanding applications such as:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-frequency Precision Spindles
- Industrial Pumps and Compressors
- Advanced Robotic Drives and Rotary Axes
