7215 ACD/P4ADGA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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7215 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7215 ACD/P4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This universal matchable bearing features an extra light preload (Class A) and is supplied as a matched set of two bearings (SU designation), enabling simplified installation and optimal performance. Its primary advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial and axial loads—thanks to its 25° contact angle. Manufactured to P4A tolerance class, it delivers superior running accuracy, high rigidity, and is suitable for high-speed operation up to 36,000 rpm, making it an ideal choice for precision machinery.
7215 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7215 | Basic bearing series; 75mm bore, 130mm OD, 50mm width | Defines the bearing dimensions and internal geometry. |
| ACD | Angular Contact, 25° contact angle, Universal Matchable (SU) | Indicates optimized design for combined loads and simplified mounting in pairs. |
| P4A | High Precision Tolerance Class | Ensures extremely tight dimensional and running accuracy for precision applications. |
| DGA | Preload: Extra Light (Class A) | Provides minimal internal clearance for high rigidity and precise rotational control under light loads. |
7215 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row angular contact design and 25° contact angle provide high radial and axial rigidity, enabling the bearing to support substantial combined loads (Dynamic: 24,975 lbf, Static: 26,550 lbf). The universal matchable (SU) pairing ensures optimal load distribution when installed in sets.
High-Speed Performance: The phenolic resin cage and optimized internal geometry contribute to stable operation at high rotational speeds, with a limiting speed of 36,000 rpm. This makes it suitable for high-speed spindle applications.
Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing guarantees exceptional running accuracy and minimal vibration. The open design allows for customized lubrication schemes to further enhance performance in specific operating conditions.
Durable Construction: Components made from chrome steel (rings and balls) ensure high fatigue life and wear resistance, suitable for a wide operating temperature range from -30°C to 110°C.
7215 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring high rigidity and speed.
- Precision Gearboxes: Applications demanding accurate shaft positioning and low running torque.
- High-Frequency Motors and Spindles: Where minimal vibration and high rotational accuracy are critical.
- Industrial Pumps and Compressors: For handling combined radial and axial loads in demanding fluid handling systems.
- Robotics and Automation: Precision joints and rotary axes requiring reliable, long-life bearing solutions.
