7215 ACDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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7215 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7215 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single bearing features a 25° contact angle and a Light preload (Class B), making it ideal for configurations where precise shaft positioning and minimal deflection under load are critical. Its P4A tolerance class ensures superior running accuracy, while its universal matchable (SU) design allows for flexible mounting in duplex sets (back-to-back or face-to-face) to handle combined loads, including significant axial loads in both directions. The open design, combined with a phenolic cage, contributes to its high-speed capabilities.
7215 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing designation: 75 mm bore, 130 mm OD, 25 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable bearing (can be paired in duplex sets). |
| P4A | High precision tolerance class, superior to ABEC 7. |
7215 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design and light preload provide excellent shaft rigidity and rotational accuracy, minimizing runout and deflection under operational loads. The P4A tolerance ensures consistent high-performance.
- Superior Load Capacity: Engineered to support combined radial and axial loads simultaneously. The 25° contact angle is optimized for applications with significant thrust loads.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling a high limiting speed of 22,000 rpm. The open seal design minimizes friction and heat generation.
- Universal Matching Capability (SU): As a universal matchable bearing, the 7215 ACDGB/P4A can be supplied in sets of three and assembled in various preloaded duplex arrangements (DB, DF, DT) to meet specific application requirements for stiffness and load capacity.
- Quality Materials: Manufactured from chrome steel for rings and balls, ensuring high durability, wear resistance, and a long operational lifespan.
7215 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-speed transmission systems.
- Industrial Pumps and Compressors: Where reliable operation under combined loads is required.
- Robotics and Automation: In high-accuracy rotary joints and arm assemblies.
