305256 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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305256 D Bearing Product Overview & Core Advantages
The 305256 D is a double row angular contact ball bearing engineered for applications requiring high rigidity and precision. This precision bearing is designed to accommodate combined loads, simultaneously supporting significant radial loads and bidirectional axial loads. Its compact double-row design offers a high load-carrying capacity in a relatively small cross-section, making it ideal for high-reliability and high-precision machinery. Manufactured to a P6 (ABEC-3) tolerance class, it ensures consistent performance and long service life in demanding operational conditions.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 305256 | Basic bearing designation indicating the bearing size with a 120 mm bore, 190 mm outside diameter, and 66 mm width. |
| D | Signifies the double row construction of the angular contact ball bearing. |
Note: This is an open (unsealed) and lubricated bearing.
305256 D Bearing Structural Features & Performance Benefits
- High Rigidity: The double row ball complement and optimized internal geometry provide superior high rigid support, minimizing deflection under load and enhancing machining or operational accuracy.
- Superior Load Capacity: Engineered to handle combined loads effectively. With a dynamic load rating of 40,950 lbf and a static load rating of 52,200 lbf, it is built for durability in heavy-duty applications.
- Precision & Speed: Manufactured to P6 tolerance and featuring a lightweight, durable stainless steel cage, this bearing supports a limiting speed of 3,600 rpm, making it suitable for high-speed operations.
- Material & Construction: Rings and balls made from high-grade chrome steel offer excellent wear resistance and fatigue life. The open design allows for customized lubrication regimes to suit specific application needs.
305256 D Bearing Typical Application Areas
This bearing is widely used in industrial machinery and equipment where precision, rigidity, and reliability are paramount. Key application areas include:
- Machine Tool Spindles
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Precision Medical and Laboratory Equipment
- Material Handling Systems
