71900 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71900 CD/P4ADBA is a metric precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This bearing features a duplex back-to-back (DB) arrangement with an extra light preload (Class A), making it ideal for applications requiring high rigidity and precise rotational accuracy. Its compact design, with a 10 mm bore and 22 mm outside diameter, allows for space-saving integration into high-speed spindles and precision mechanisms. The bearing is pre-lubricated and operates effectively within a temperature range of -30°C to 110°C, offering reliable performance in controlled environments.
71900 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71900: Basic bearing series designation, indicating a 10 mm bore and 22 mm outside diameter.
- C: Represents a 15° contact angle, optimized for combined loads.
- D: Indicates the bearing is part of a duplex pair in a specific arrangement.
- P4A: Denotes a very high tolerance class (P4A), ensuring extreme dimensional and running accuracy.
- DB: Specifies the duplex back-to-back arrangement, which provides high moment rigidity.
- A: Signifies the extra light preload (Class A) applied to the matched set.
71900 CD/P4ADBA Bearing Structural Features & Performance Benefits
This bearing's construction delivers significant performance advantages:
- High Rigidity & Precision: The duplex back-to-back (DB) arrangement of two bearings creates a rigid bearing system that effectively resists moment loads, making it suitable for applications like machine tool spindles where high running accuracy is critical.
- Combined Load Capacity: The 15° contact angle enables the bearing to support substantial combined radial and axial loads simultaneously.
- High-Speed Capability: The phenolic resin cage is lightweight and robust, contributing to low friction and enabling a high limiting speed of 165,000 rpm. The precision P4A tolerance grade further ensures smooth, stable operation at high rotational speeds.
- Optimized for Precision: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration.
71900 CD/P4ADBA Bearing Typical Application Areas
The 71900 CD/P4ADBA is engineered for high-precision, high-speed applications, including:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Machine Tool Axes
- Medical and Dental Handpiece Drives
- Advanced Robotics and Automation components requiring precise motion control
