7013 ACD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7013 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 7013 ACD/P4ATBTA is a precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing excels at handling combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it offers superior running accuracy and dimensional stability. The extra light preload (Class A) minimizes deflection under load, making it ideal for high-precision, high-stiffness applications such as machine tool spindles and precision rotary tables.
7013 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Basic bearing series and size designation |
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| TBT | Triplex Back-to-Back arrangement of three matched bearings |
| A | Extra light preload for minimal deflection and smooth operation |
7013 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined loads and moments. With a radial dynamic load rating of 19,170 lbf and static load rating of 23,850 lbf, this bearing delivers reliable performance under demanding conditions.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration. The 25° contact angle provides optimal axial load capacity while maintaining good radial performance.
High-Speed Capability: Featuring a phenolic cage and precision-ground chrome steel balls, the bearing achieves a limiting speed of 31,000 rpm. The lightweight cage material reduces centrifugal forces, enabling stable operation at high rotational speeds.
Premium Materials: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and durability. The phenolic cage provides good dimensional stability across the operating temperature range of -30°C to 110°C.
7013 ACD/P4ATBTA Bearing Typical Application Areas
The 7013 ACD/P4ATBTA is specifically designed for high-precision machinery and equipment requiring exceptional rigidity and accuracy:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Rotary Tables - Indexing and positioning systems
- High-Speed Machining Centers - Where minimal deflection is critical
- Precision Measuring Instruments - Coordinate measuring machines and metrology equipment
- Industrial Robotics - Precision joints and rotary actuators
- Aerospace Positioning Systems - Guidance and control mechanisms
