7013 ACD/P4AQBTB
7000 Series Super Precision Angular Contact Ball Bearings
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7013 ACD/P4AQBTB Bearing Product Overview & Core Advantages
The 7013 ACD/P4AQBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This bearing is supplied as a Quadruplex Tandem Back-to-Back (QBT) matched set, consisting of four preloaded bearings. This specific arrangement is engineered to handle combined loads with superior high rigidity, making it ideal for high-precision spindles and other machinery where minimal deflection under load is critical. The P4A tolerance class ensures extremely tight dimensional and running accuracy for superior performance.
7013 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Basic bearing series, indicating a 65mm bore, 100mm OD, and 18mm width per single bearing. |
| ACD | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| P4A | Indicates a high-precision tolerance class with very tight running accuracy and dimensional tolerances. |
| QBTB | Specifies the bearing is a Quadruplex (4) Tandem Back-to-Back matched set with a Light (Class B) preload applied. |
7013 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Quadruplex Tandem Back-to-Back (QBT) arrangement provides exceptional system stiffness, enabling the bearing set to withstand significant combined radial and axial loads with minimal deformation. The 25° contact angle is optimized for high axial load support.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees extremely precise running and dimensional accuracy, which is essential for applications like high-speed machining spindles.
- High-Speed Capability: The phenolic cage is lightweight and robust, contributing to lower friction and enabling high limiting speeds (31,000 rpm). The open design allows for efficient lubrication management.
- Matched Set Reliability: Supplied as a factory-matched set of four bearings, ensuring consistent preload and performance across the entire assembly, which simplifies installation and guarantees operational reliability.
7013 ACD/P4AQBTB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for advanced industrial machinery, including:
- High-Speed Machine Tool Spindles (e.g., CNC milling, grinding, and jig boring machines)
- Precision Grinding Spindles
- High-performance Industrial Pumps and Compressors
- Other precision rotary applications requiring maximum rigidity and accuracy under combined loads.
