7013 CD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7013 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7013 CD/P4ADBC is a duplex back-to-back (DB) matched pair of metric angular contact ball bearings, preloaded to Moderate / Class C standards. This configuration is engineered for applications demanding high rigidity and precise rotational accuracy under combined radial and axial loads. Manufactured to the exacting P4A tolerance class, this bearing set offers exceptional running accuracy and stability, making it ideal for high-precision, high-speed machinery where uncompromising performance is critical.
7013 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 7013: Basic designation indicating a 65 mm bore, 100 mm OD, and 36 mm width.
- C: Denotes a 15° contact angle, optimized for handling significant axial loads.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Specifies a very high tolerance class for superior dimensional and running accuracy.
- DB: Defines the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity.
- C: Specifies the Moderate / Class C preload for optimal stiffness and minimal deflection.
7013 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that can withstand heavy combined loads and moment loads effectively. The 15° contact angle is specifically chosen to provide excellent axial load-carrying capacity in both directions.
Precision & High-Speed Performance: Built to P4A tolerance class, these bearings ensure minimal runout and vibration. The lightweight phenolic cage and precision-ground chrome steel components contribute to stable operation at the specified limiting speed of 24,000 rpm.
Optimized Preload: The factory-set Moderate (Class C) preload eliminates internal clearance, enhancing shaft positioning accuracy and system stiffness without generating excessive heat, which is crucial for maintaining performance across the operating temperature range.
7013 CD/P4ADBC Bearing Typical Application Areas
This high-precision, preloaded bearing set is typically employed in demanding applications such as:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-frequency Spindles for PCB Drilling
- Precision Robotic Arm Joints
- High-performance Pumps and Compressors
- Axles and gearboxes in Aerospace and Defense equipment
