71824 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71824 CD/P4DBA Bearing Product Overview & Core Advantages
The 71824 CD/P4DBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set features an Extra Light (Class A) preload, providing superior system stiffness and minimizing axial and radial runout. Engineered to a P4 tolerance class, it is ideal for high-speed spindles and other precision machinery where high rigidity and precise shaft positioning are critical. The bearing is supplied pre-lubricated and ready for installation.
Model Code Breakdown
- 71824: Basic bearing designation indicating a metric, angular contact ball bearing with a 120mm bore, 150mm OD, and 32mm width.
- C: Signifies a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- D: Indicates the bearing is part of a duplex pair.
- P4: Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy limits.
- DB: Specifies the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and accommodates combined radial and axial loads from both directions.
- A: Identifies the Extra Light preload grade, which minimizes friction and heat generation while maintaining high system stiffness.
71824 CD/P4DBA Bearing Structural Features & Performance Benefits
The performance of the 71824 CD/P4DBA is derived from its specific construction:
- High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and ensures precise shaft guidance, making it ideal for machine tool spindles.
- Precision Performance: Manufactured to P4 tolerance class standards, this bearing guarantees minimal runout and smooth, quiet operation at high speeds.
- Optimized High-Speed Capability: The 15° contact angle and lightweight phenolic cage reduce centrifugal forces and friction, enabling a high limiting speed of 16,250 rpm.
- Superior Load Capacity: The design is capable of handling significant combined loads (radial and axial simultaneously), with a high dynamic load rating of 12,150 lbf and static load rating of 20,250 lbf.
- Durability and Reliability: Manufactured from high-grade chrome steel for both rings and balls, the bearing ensures long service life and consistent performance.
71824 CD/P4DBA Bearing Typical Application Areas
This precision bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Aerospace and Defense Positioning Systems
