7013 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7013 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7013 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and running 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 extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-precision, high-rigidity systems. Manufactured from high-grade chrome steel with a phenolic cage, it offers reliable performance within a temperature range of -30°C to 110°C.
7013 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Basic bearing series, indicating a 65mm bore, 100mm OD, and 36mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings supplied as a matched set). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for superior running accuracy. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity. |
| A | Specifies Extra Light preload (Class A) for minimal friction and heat generation. |
7013 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and tilting moments. This configuration allows the bearing set to handle significant combined radial and axial loads in both directions. With a dynamic load rating of 14,332 lbf and a static load rating of 15,975 lbf, it delivers robust performance in demanding applications.
Precision & Speed Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures exceptional running accuracy and rotational precision. The phenolic cage and optimized internal geometry contribute to stable operation at high speeds, with a limiting speed of 31,000 rpm.
Optimized Internal Design: The bearing incorporates 20 high-precision chrome steel balls with a diameter of 11.112 mm, arranged to maximize load distribution. The 25° contact angle is optimized for axial load carrying capacity while maintaining good radial load performance.
7013 ACD/P4ADBA Bearing Typical Application Areas
The 7013 ACD/P4ADBA is engineered for high-precision machinery and systems requiring superior rigidity and accuracy:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Speed Precision Spindles in PCB drilling and routing equipment
- Robotic Arm Joints and precision positioning systems
- Medical Equipment including dental handpieces and surgical tools
- Aerospace Actuation Systems requiring high precision and reliability
- Test and Measurement Equipment spindles and rotary tables
