7011 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7011 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7011 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back (DB) matched arrangement, enabling it to withstand combined radial and axial loads from both directions simultaneously. Its moderate preload (Class C) ensures optimal stiffness and rotational accuracy, making it ideal for high-precision spindles and machinery where minimal deflection is critical. The phenolic cage and chrome steel construction contribute to its high-speed capability and long service life.
7011 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex Back-to-Back arrangement | Provides high moment stiffness and stable operation under complex loading conditions. |
| P4A | High Precision Tolerance Class (superior to ABEC 7) | Ensures extremely tight running accuracy, low vibration, and superior performance in precision applications. |
| DBC | Duplex Back-to-Back set with Moderate Preload (Class C) | Eliminates internal clearance, increases system rigidity, and maintains precise shaft positioning without requiring user adjustment. |
7011 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and complex combined loads. The 25° contact angle is optimized for carrying significant axial loads in both directions alongside radial loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing achieves exceptional running accuracy and is capable of high-speed operation up to 34,000 rpm. The lightweight cage reduces centrifugal forces and friction.
- Optimized for Precision Mounting: The bearing set comes pre-lubricated and is supplied as a matched pair, ensuring consistent preload and performance. The tight dimensional tolerances on the bore diameter (55 mm), outside diameter (90 mm), and width (36 mm) facilitate precise and repeatable installation.
- Durable Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and reliability under demanding operating conditions within a temperature range of -30°C to 110°C.
7011 ACD/P4ADBC Bearing Typical Application Areas
The 7011 ACD/P4ADBC is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Robotics, aerospace actuation systems.
- High-Frequency Motors and Spindles: PCB drilling, dental handpieces.
- Medical and Laboratory Equipment: Centrifuges, precision scanners.
- Advanced Pumps and Compressors: Where accurate shaft positioning is critical.
