71924 ACD/P4ADBB
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
71924 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71924 ACD/P4ADBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) pair. This matched set is preloaded to Light / Class B specifications, delivering exceptional rotational accuracy and system rigidity. Engineered to handle combined radial and axial loads simultaneously, it is ideal for applications demanding high precision, high speed, and superior operational stability. The bearings are pre-lubricated and feature an open design for optimal performance in controlled environments.
71924 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71924 ACD/P4ADBB provides detailed technical specifications:
- 71924: Basic bearing designation indicating a 120 mm bore, 165 mm OD, and 44 mm width.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies the bearing is part of a Duplex (matched pair) set.
- DB: Specifies the Back-to-Back mounting arrangement.
- P4A: Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards.
71924 ACD/P4ADBB Bearing Structural Features & Performance Benefits
The design of the 71924 ACD/P4ADBB delivers distinct performance advantages:
- High Rigidity & Axial Stiffness: The duplex back-to-back (DB) arrangement creates a robust, preloaded system that resists moment loads and provides exceptional axial and radial stiffness, crucial for maintaining precision under load.
- Superior Load Capacity: With a dynamic load rating of 26,775 lbf and a static load rating of 38,925 lbf, this bearing pair is built to handle significant combined loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 16,250 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, guaranteeing minimal runout and superior running accuracy.
71924 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing set is ideally suited for demanding applications in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Robotic Drives.
- High-Frequency Motors and Spindles.
- Medical Equipment and Aerospace Actuators.
- Test and Measurement Equipment requiring extreme accuracy.
