7213 ACD/P4ADBA
7200 & 7300 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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7213 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7213 ACD/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a duplex back-to-back (DB) arrangement, this pre-matched pair is engineered to withstand combined loads, including significant radial and bidirectional axial loads. Manufactured to P4A tolerance class, it offers superior running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The extra light preload (Class A) ensures minimal deflection under operational stresses, contributing to outstanding system stability and longevity.
7213 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series; 65 mm bore, 120 mm OD, 46 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings) configuration. |
| DB | Back-to-Back arrangement, providing high moment rigidity. |
| P4A | High-Precision Tolerance Class (exceeds ABEC 7), ensuring minimal runout and vibration. |
7213 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases rigidity and enables the bearing to handle combined radial and axial loads effectively. The 25° contact angle is optimized for substantial axial load carrying capacity.
- Precision & High-Speed Performance: Built to P4A tolerance class with tight dimensional tolerances on all bearing dimensions (bore, OD, width), this bearing ensures smooth, quiet operation. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 36,000 rpm, making it suitable for high-speed applications.
- Superior Material & Construction: Both rings and balls are made from high-grade chrome steel, providing excellent wear resistance and durability. The bearings are pre-lubricated for immediate operation upon installation.
- Matched Set Performance: Supplied as a pre-matched pair, these bearings are selectively assembled to ensure optimal preload and performance characteristics, eliminating the need for on-site matching and reducing assembly time.
7213 ACD/P4ADBA Bearing Typical Application Areas
The 7213 ACD/P4ADBA is specified for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Robotic Drives.
- High-Frequency Motors and Spindle Drives.
- Medical Equipment: High-speed dental handpieces and imaging devices.
- Aerospace & Defense Systems: Gyroscopes and precision navigation equipment.
