71906 CD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71906 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 71906 CD/P4AQBCB is a precision quadruplex matched set of angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class configuration, arranged in a Back-to-Back (QBC) quadruplex set, provides superior stability and load-handling capabilities. Its core advantages include the ability to support combined loads (radial and axial) from multiple directions simultaneously, offering high rigidity and maintaining precision under high-speed operation up to 100,500 rpm. The light preload (Class B) ensures minimal deflection and optimal performance in high-precision machinery.
71906 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
- 71906: Basic bearing designation, indicating a 30 mm bore diameter and light series.
- CD: Internal design designation, specifying contact angle and internal clearances optimized for the matched set.
- P4A: Tolerance class designation, signifying very high precision levels for both dimensional and running accuracy.
- QBC: Matched arrangement code for a Quadruplex Back-to-Back set, consisting of 4 bearings pre-configured for maximum rigidity and moment load capacity.
- B: Indicates the specific preload level, in this case, Light / Class B.
71906 CD/P4AQBCB Bearing Structural Features & Performance Benefits
The performance of the 71906 CD/P4AQBCB is derived from its advanced structural design:
- High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding significant combined radial and axial loads, as well as moment loads. The 15° contact angle is optimized for high-speed operation while maintaining good axial load capacity.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class, these bearings ensure minimal runout and vibration. The phenolic resin cage contributes to low friction and high-speed capability, enabling operation at limiting speeds of 100,500 rpm.
- Optimized for Matched Sets: As a factory-matched set of 4 bearings, this configuration guarantees uniform load distribution and predictable performance, eliminating the need for complex on-site matching and ensuring immediate, reliable operation.
71906 CD/P4AQBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for demanding applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Aerospace Control Systems
- Medical and Dental Equipment Spindles
- Any application requiring extreme rotational accuracy, rigidity, and high-speed capability.
