7213 CD/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 CD/P4AQBCC Bearing Product Overview & Core Advantages
The 7213 CD/P4AQBCC is a high-precision quadruplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set configuration delivers superior performance in handling combined radial and axial loads from multiple directions simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-rigidity spindles. The phenolic cage and optimized 15° contact angle contribute to its outstanding high-speed capabilities and smooth operation.
7213 CD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
- 7213: Basic bearing series, indicating a 65mm bore, 120mm OD, and standard angular contact design.
- CD: Indicates a moderate preload (Class C) applied to the bearing set for optimal stiffness and rotational accuracy.
- P4A: Denotes an ultra-precision tolerance class with extremely tight dimensional and running accuracy limits.
- QBCC: Specifies the matched arrangement as a Quadruplex Back-to-Back (QBC) set, consisting of four bearings configured to provide maximum rigidity against complex moment loads.
7213 CD/P4AQBCC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moment forces, making it suitable for machine tool spindles and other high-precision machinery.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the 15° contact angle and precision-ground components enable stable operation at the specified limiting speed of 32,500 rpm.
Precision Engineering: Manufactured to P4A super-precision standards with tight bore, outer diameter, and width tolerances, this bearing ensures minimal vibration and superior running accuracy for critical applications.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and durability under demanding operating conditions.
7213 CD/P4AQBCC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Gearboxes and transmission systems requiring high rigidity
- High-Frequency Motors and spindle drives
- Aerospace Positioning Systems and robotic actuators
- Medical Equipment such as high-speed dental handpieces and surgical tools
