7013 CD/P4ADBD
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7013 CD/P4ADBD Bearing Product Overview & Core Advantages
The 7013 CD/P4ADBD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement provides superior stability under combined loads (radial and axial) and is preloaded to Heavy / Class D specifications for maximum system stiffness. Manufactured to P4A tolerance class, it ensures high running accuracy and is ideal for high-speed, high-precision machinery where reliability is critical.
7013 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Basic bearing series, defining the standard dimensions: 65 mm bore, 100 mm OD, 36 mm width. |
| C | 15° contact angle, optimized for carrying significant axial loads. |
| D | Heavy preload (Class D), providing high rigidity and minimal axial/radial play. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for superior running accuracy. |
| DB | Duplex Back-to-Back matched arrangement. Two bearings are mounted opposing each other to withstand moment loads and provide high operational stability. |
7013 CD/P4ADBD Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system capable of withstanding combined radial and axial loads from both directions, as well as moment loads. The heavy preload (Class D) eliminates internal clearance, ensuring precise shaft positioning and enhanced system stiffness.
High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 24,000 rpm. The 15° contact angle is well-suited for high-speed operation.
Precision & Durability: Manufactured from chrome steel for both rings and balls, and built to P4A tolerance, this bearing guarantees high dimensional stability, low noise, and long service life in precision applications.
7013 CD/P4ADBD Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Frequency Motors and Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arms and Precision Positioning Systems
