7215 CD/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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7215 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7215 CD/P4ADBA is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for applications demanding exceptional rotational accuracy and rigidity, this matched pair is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial runout. Its primary advantage lies in its ability to handle combined loads—significant radial forces alongside substantial axial loads in both directions—making it an ideal solution for high-precision, high-stiffness spindles and systems.
7215 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7215 | Basic bearing designation (75mm bore, 130mm OD) | Defines the core bearing dimensions. |
| C | 15° Contact Angle | Optimized for high axial load capacity and moderate high-speed performance. |
| D | Duplex Back-to-Back (DB) Arrangement | Provides high moment stiffness and stability under complex loads. |
| P4A | High Precision Tolerance Class (equivalent to ABEC 7) | Guarantees extremely tight dimensional and running accuracy for precision applications. |
| DB | Duplex Back-to-Back preload | Specifies the mounting arrangement and preload level (Class A). |
| A | Extra Light Preload | Minimizes friction and heat generation, favoring very high-speed operation. |
7215 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists overturning moments, making it exceptionally stable under combined loads.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 26,325 lbf, this bearing is engineered to handle significant radial and bidirectional axial loads simultaneously.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload minimizes friction. This combination supports a high limiting speed of 22,000 rpm.
Precision & Accuracy: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration for ultra-precise positioning.
Material Integrity: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and long-term dimensional stability.
7215 CD/P4ADBA Bearing Typical Application Areas
The 7215 CD/P4ADBA is specifically designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPMs.
- Robotic Arms & Precision Gearboxes: Applications requiring high stiffness and positional accuracy.
