51388
51300 & 51400 Series Heavy Duty Thrust Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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51388 Bearing Product Overview & Core Advantages
The 51388 metric thrust ball bearing is engineered for applications requiring exceptional axial load capacity in a single direction. This precision bearing is characterized by its large bore diameter and robust construction, making it suitable for heavy-duty machinery where high axial static and dynamic load ratings are paramount. Manufactured from 52100 Chrome Steel for both rings and balls, it ensures high durability and reliable performance in demanding industrial environments.
51388 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation |
|---|---|
| 51388 | The basic model number, defining the core bearing dimensions (Bore: 440mm, OD: 680mm, Width: 190mm). |
| Seal type: Open | Indicates the bearing is supplied without integral seals or shields, allowing for custom lubrication systems and facilitating heat dissipation. |
| For load direction: Thrust | Specifically designed to accommodate axial loads only. |
51388 Bearing Structural Features & Performance Benefits
- High Axial Load Capacity: Engineered with a large contact angle and robust construction, this bearing delivers an axial dynamic load rating of 336,764 lbf and a substantial axial static load rating of 1,846,805 lbf, making it ideal for sustaining heavy thrust forces.
- Durable Material Construction: The use of 52100 Chrome Steel for both the rings and balls ensures high hardness, wear resistance, and long service life under high-stress conditions.
- Chrome Steel Cage: The cage, also made from chrome steel, provides high strength and stability, ensuring proper ball guidance and reliable operation.
- Precision Tolerances: Features tight dimensional tolerances on the bore, outside diameter, and width, ensuring precise fitment and optimal performance in precision machinery.
- Operating Conditions: With a limiting speed of 0.57 x 1000 rpm and a temperature range from -30°C to 110°C, it is suited for a variety of industrial applications. Note that external lubrication is required for operation.
51388 Bearing Typical Application Areas
This high-capacity thrust ball bearing is commonly specified in heavy machinery and industrial systems where significant unidirectional axial loads are present. Key applications include:
- Vertical Pumps and Compressors
- Heavy-Duty Gearboxes and power transmission systems
- Cranes and Hoisting Equipment
- Industrial Mixers and Agitators
- Marine Propulsion Systems
- Presses and Stamping Machinery
