71920 ACE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71920 ACE/P4ADBB Bearing Product Overview & Core Advantages
The 71920 ACE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement of two bearings is preloaded (Light / Class B), delivering superior stiffness and stability under combined loads (radial and axial). Manufactured to a P4A tolerance class, it is engineered for high-performance scenarios where precision and reliability are paramount. Its compact design and high load capacity make it an ideal solution for sophisticated machinery.
71920 ACE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation (100mm bore, 140mm OD, 40mm width). |
| ACE | Indicates a 25° contact angle, optimized for carrying high axial loads. |
| P4A | Denotes a high precision tolerance class, ensuring minimal runout and vibration for smooth operation. |
| DB | Signifies a Duplex Back-to-Back matched set, providing high moment rigidity. |
71920 ACE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement with a light preload creates a highly rigid bearing system that effectively resists operational moments and deflection, ensuring precise shaft positioning.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 13,612 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
Precision Performance: The P4A tolerance class guarantees tight dimensional and running accuracy. The phenolic cage contributes to smooth operation at high speeds, with a limiting speed of 16,000 rpm, making it suitable for high-speed applications.
Durable Construction: Manufactured from chrome steel for both rings and balls, this bearing offers high durability and a long operational life under standard operating temperatures.
71920 ACE/P4ADBB Bearing Typical Application Areas
The 71920 ACE/P4ADBB is ideally suited for high-precision machinery and systems, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- Industrial Robotics and Automation
- High-Speed Pumps and Compressors
