S71913 ACB/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71913 ACB/P4ADBB Bearing Product Overview & Core Advantages
The S71913 ACB/P4ADBB is a high-precision metric double row angular contact ball bearing designed for demanding applications requiring exceptional rigidity and running accuracy. This bearing features a duplex back-to-back (DB) arrangement with a light preload (Class B), making it ideal for supporting combined radial and axial loads in both directions. Manufactured to a P4A tolerance class and utilizing a phenolic cage, it delivers superior high-speed performance, high rigidity, and reliable operation in precision machinery.
S71913 ACB/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number S71913 ACB/P4ADBB provides detailed technical specifications:
- S7: High-precision angular contact ball bearing series
- 1913: Dimension series; 19 indicates the width series, 13 indicates a 65mm bore diameter
- ACB: Angular Contact Bearing with a 25° contact angle
- P4A: High-Precision Tolerance Class (exceeding ABEC 7), with specific focus on running accuracy
- DB: Duplex Back-to-Back arrangement of two bearings, providing high moment rigidity
- B: Designates Light Preload (Class B)
S71913 ACB/P4ADBB Bearing Structural Features & Performance Benefits
The design of the S71913 ACB/P4ADBB translates directly into significant performance benefits for critical applications:
- High Rigidity & Load Capacity: The double row design in a back-to-back duplex arrangement provides exceptional resistance to moment loads and offers high rigidity, enabling it to handle significant combined radial and axial loads from both directions.
- Superior High-Speed Performance: The standard phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the high limiting speed of 31,000 rpm. The 25° contact angle is optimized for high-speed applications requiring axial load support.
- Precision & Accuracy: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and superior rotational accuracy, which is critical for the performance of precision spindles.
- Optimized for Performance: The bearing is pre-lubricated with grease suitable for a wide temperature range of -30°C to 110°C, ensuring immediate and reliable operation upon installation.
S71913 ACB/P4ADBB Bearing Typical Application Areas
This high-precision, high-rigidity bearing is engineered for use in advanced machinery where accuracy and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and other high-precision equipment.
- High-Frequency Motors and Robotic Drives requiring high rigidity and speed.
- Medical Equipment and Analytical Instruments demanding quiet and precise rotation.
