71926 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71926 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71926 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Extra light / Class A specifications, ensuring high system stiffness and minimal axial and radial runout. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with superior precision, making it an ideal choice for high-speed, high-rigidity spindles and other precision machinery.
71926 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71926: Basic designation for a high-precision angular contact ball bearing series with a 130 mm bore.
- C: Denotes a 15° contact angle, optimized for high-speed operation.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Specifies a super-precision tolerance class (exceeding ABEC 7), ensuring extremely tight dimensional and running accuracy.
- DB: Defines the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity.
- A: Specifies the Extra light preload level within the matched set.
71926 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The back-to-back duplex design creates a wide effective spread, significantly increasing the bearing system's resistance to moment loads and enhancing overall rigidity.
Superior Precision: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy.
Optimized High-Speed Performance: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling stable operation at the specified limiting speed of 7,500 rpm.
Robust Load Capacity: With a dynamic load rating of 33,300 lbf and a static load rating of 48,600 lbf, it reliably sustains significant combined loads.
71926 CD/P4ADBA Bearing Typical Application Areas
The 71926 CD/P4ADBA is engineered for the most demanding precision applications, including:
- Machine Tool Spindles (e.g., for CNC milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Grinding Equipment
- High-Speed Robotic Drives
- Advanced Medical and Laboratory Equipment
