7213 ACD/P4AQBCC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7213 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7213 ACD/P4AQBCC is a precision quadruplex angular contact ball bearing designed for applications requiring exceptional rigidity and load capacity. This P4A tolerance class bearing features a back-to-back quadruplex (QBC) arrangement, providing superior stability under combined radial and axial loads. With a moderate preload (Class C) and optimized 25° contact angle, it delivers high running accuracy and is ideal for high-precision, high-rigidity machinery where minimal deflection is critical.
7213 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series with 65mm bore, 120mm OD |
| ACD | 25° contact angle design |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| QBCC | Quadruplex back-to-back arrangement with moderate preload |
7213 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The quadruplex back-to-back configuration creates an extremely rigid bearing system capable of handling heavy combined loads from multiple directions. This arrangement provides superior moment stiffness, making it ideal for applications requiring precise shaft positioning.
Precision Performance: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration. The phenolic cage material offers excellent dimensional stability and reduced friction at high speeds.
Optimized Contact Design: The 25° contact angle provides an optimal balance between radial and axial load capacity, while the moderate preload (Class C) eliminates internal clearance for improved positional accuracy and reduced vibration.
Material Excellence: Constructed from chrome steel for both rings and balls, the bearing delivers high fatigue resistance and long service life under demanding operating conditions.
7213 ACD/P4AQBCC Bearing Typical Application Areas
- Machine tool spindles for high-precision machining centers
- High-speed machining equipment requiring extreme rigidity
- Precision grinding spindles and milling machine applications
- Industrial robotics and automation systems
- Aerospace positioning systems requiring high accuracy
- Medical equipment spindles and precision instruments
- Test and measurement equipment requiring minimal deflection
