305272 D
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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305272 D Bearing Product Overview & Core Advantages
The 305272 D is a double row angular contact ball bearing designed for demanding applications requiring high precision and rigidity. This metric bearing excels at simultaneously handling substantial combined loads, including radial loads and axial loads in both directions. Its open design, coupled with a P6 (ABEC-3) tolerance class, ensures superior running accuracy, making it an ideal choice for high-performance machinery where reliability and precision are paramount. The robust construction and optimized internal geometry contribute to its exceptional load capacity and operational stability.
305272 D Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Significance |
|---|---|---|
| D | Double Row Angular Contact Ball Bearing | Indicates the fundamental bearing construction, designed to handle combined loads and provide high rigidity. |
| Open | No integral seals or shields | Allows for custom lubrication schemes and is suitable for applications where external sealing is provided. Enables higher limiting speeds. |
| P6 | Tolerance Class (equivalent to ABEC-3) | Denotes a precision bearing with tighter dimensional and running accuracy tolerances for smooth, low-vibration operation. |
305272 D Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a significantly wider effective load spread compared to single row bearings, resulting in superior stiffness and the ability to support high radial dynamic load ratings of 70,200 lbf and static load ratings of 117,000 lbf. This makes it exceptionally resistant to deformation under heavy combined loads.
- Optimized Internal Geometry: The specified shoulder diameters on the inner and outer rings ensure precise guidance and secure seating, enhancing overall stability and load distribution.
- Durable Material Construction: Manufactured from chrome steel rings and balls with a stainless steel cage, this bearing offers excellent durability, wear resistance, and corrosion resistance, ensuring a long service life.
- Precision Performance: The P6 tolerance class guarantees precise dimensions and minimal runout, which is critical for applications requiring high rotational accuracy and smooth operation.
305272 D Bearing Typical Application Areas
The 305272 D is engineered for robust industrial environments. Its key application areas include:
- Industrial Gearboxes and heavy-duty transmission systems
- Large Pumps and Compressors
- Material Handling Equipment such as conveyor pulleys
- Construction and Mining Machinery
- Paper and Steel Mill Equipment
