7013 CD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7013 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 7013 CD/P4AQBCB is a precision angular contact ball bearing configured as a Quadruplex Back-to-Back (QBC) matched set. Engineered for exceptional performance in demanding applications, it is characterized by its P4A super-precision tolerance class and light preload (Class B). This configuration delivers superior system rigidity and outstanding running accuracy, making it ideal for spindles requiring high rotational speeds and precise positioning under combined radial and axial loads.
7013 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Standard bearing series designation (65mm bore, 100mm OD, 72mm width). |
| CD | Specifies a 15° contact angle and specific internal design for high-speed operation. |
| P4A | Indicates a super-precision tolerance class, tighter than ABEC 7/ISO P4, ensuring minimal runout and vibration. |
| QBCB | Defines the matched set arrangement: Quadruplex (4 bearings), Back-to-Back mounting, with Class B (Light) preload. |
7013 CD/P4AQBCB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an exceptionally stiff bearing system capable of withstanding heavy combined loads and moment loads. This configuration provides stable support for spindles, minimizing deflection under operational stresses.
High-Speed Performance: The 15° contact angle and phenolic resin cage are optimized for high-speed operation (up to 24,000 rpm), offering low friction, reduced centrifugal forces, and excellent acceleration characteristics.
Precision & Accuracy: Manufactured to P4A super-precision standards with tight dimensional tolerances on the bore, outside diameter, and width. This guarantees high running accuracy, reduced vibration, and consistent performance in precision machinery.
Material & Lubrication: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue life. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7013 CD/P4AQBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for advanced applications, including:
- High-Speed Machine Tool Spindles (e.g., milling, grinding, and drilling)
- Precision Grinding Spindles
- High-performance Industrial Pumps and Compressors
- Aerospace and Defense positioning systems
- Other precision rotary equipment requiring maximum stiffness and speed.
