71822 ACD/P4DBC
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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Product Overview and Core Advantages
The 71822 ACD/P4DBC is a precision duplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and rotational accuracy. This P4 tolerance class bearing is preloaded and matched as a set, enabling it to handle combined radial and axial loads from both directions simultaneously. Its compact design and high rigidity make it ideal for high-speed spindles and other precision machinery where minimal deflection and superior running accuracy are critical.
Model Code In-Depth Analysis
- 71822: Basic bearing series and size designation (Bore: 110mm, OD: 140mm, Width: 32mm).
- ACD: Angular Contact design with a 25° contact angle and a Duplex Back-to-Back (DB) arrangement. This configuration provides high moment rigidity.
- P4: Denotes a high-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
- DBC: Indicates a Moderate preload (Class C) is applied to the matched set of 2 bearings. This preload eliminates internal clearance, enhancing system stiffness and performance.
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement significantly increases the bearing's resistance to moment loads, providing exceptional stiffness.
Precision Performance: Manufactured to P4 tolerance standards with a 25° contact angle, this bearing delivers superior running accuracy and is optimized for high-speed operation.
Optimized Internal Design: Features 32 high-grade chrome steel balls and a lightweight, durable phenolic resin cage, which contributes to smooth operation at the limiting speed and reduced centrifugal forces.
Preload and Matching: The bearings are supplied as a matched set with a moderate preload (Class C), ensuring immediate optimal performance without requiring additional adjustment during installation.
71822 ACD/P4DBC Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
• Machine Tool Spindles: High-speed milling, grinding, and turning centers.
• Precision Gearboxes: Where high rigidity and accurate shaft positioning are required.
• High-Frequency Motors and Spindles: Applications demanding minimal runout and thermal stability.
• Industrial Pumps and Compressors: For handling significant combined loads.
