305283 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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305283 D Bearing Product Overview & Core Advantages
The 305283 D is a metric double row angular contact ball bearing engineered for applications demanding high precision and robust performance. Its double row design provides exceptional rigidity and enables it to support substantial combined loads—simultaneously handling radial forces and bidirectional axial loads. Manufactured to a P6 (ABEC-3) tolerance class, this bearing ensures high running accuracy, making it ideal for high-reliability machinery. Its open design, when properly lubricated, is optimized for high-speed operation, with a limiting speed of 3000 rpm.
305283 D Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 305283 | Basic Bearing Number | Defines the core dimensions: 150mm bore, 230mm OD, 70mm width. |
| D | Double Row Construction | Indicates the bearing has two rows of balls, providing high load capacity and rigidity. |
Note: This is an open bearing (no seal suffix), offering flexibility for custom lubrication systems to achieve optimal high-speed performance.
305283 D Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior stiffness, effectively supporting heavy combined radial and axial loads from both directions. The large shoulder diameters on both rings further enhance axial load support.
- Precision & High-Speed Capability: Built to P6 tolerance with a stainless steel cage, this bearing ensures smooth, precise, and quiet operation at high rotational speeds up to 3000 rpm.
- Durable Material Construction: Rings and balls made from chrome steel offer high load ratings (Cr = 45675 lbf, C0r = 64125 lbf) and excellent wear resistance, ensuring long service life.
- Application Flexibility: The open seal type allows for the use of specialized lubricants tailored to specific operational environments and temperature ranges (-30°C to 110°C).
305283 D Bearing Typical Application Areas
The 305283 D double row angular contact ball bearing is ideally suited for demanding industrial applications, including:
- Machine Tool Spindles
- Industrial Pumps and Compressors
- Gearboxes and Power Transmission Systems
- Precision Industrial Machinery
