7215 ACD/P4ADBA
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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7215 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7215 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This P4A tolerance class bearing is supplied as a matched back-to-back (DB) set, enabling it to withstand combined radial and axial loads from both directions simultaneously. Its extra light preload (Class A) ensures minimal friction and precise running, making it ideal for high-speed spindles and other demanding machinery where high rigidity and dimensional stability are critical.
7215 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing designation: 75 mm bore, 130 mm OD, 50 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is part of a Duplex (matched) set. |
| P4A | High Precision Tolerance Class, specifying extremely tight dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement of the duplex pair. |
| A | Specifies Extra Light Preload (Class A). |
7215 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing moment stiffness and enabling the bearing set to handle heavy combined loads and tilting moments effectively.
Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a phenolic cage, this bearing ensures smooth operation, low vibration, and excellent performance at the specified limiting speed of 36,000 rpm. The 25° contact angle provides an optimal balance between axial and radial load capacity.
Superior Material & Construction: Made from chrome steel for both rings and balls, the bearing offers high durability and wear resistance. The open design, pre-lubricated for immediate use, allows for customized lubrication schemes in advanced applications.
7215 ACD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring high positional accuracy and rigidity.
- High-Frequency Motors and Spindles: Where minimal runout and thermal stability are paramount.
- Industrial Pumps and Compressors: For shafts subjected to significant axial and radial forces.
