51420 M
51300 & 51400 Series Heavy Duty Thrust Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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51420 M Bearing Product Overview & Core Advantages
The 51420 M is a metric thrust ball bearing engineered for demanding applications requiring high axial load capacity and precision operation. This open-type bearing is designed to accommodate thrust loads in a single direction, making it an ideal solution for high-stress environments. Manufactured from 52100 Chrome Steel for both rings and balls, it delivers exceptional durability and wear resistance. Its key advantages include a high axial dynamic load rating of 83,475 lbf and an impressive axial static load rating of 238,500 lbf, ensuring reliable performance under significant force. The bearing is also RoHS and REACH compliant, meeting stringent international environmental standards.
51420 M Bearing Model Code Explained, Specifications & Naming Convention
| Suffix / Prefix | Technical Meaning | Significance & Advantage |
|---|---|---|
| 51420 | Basic bearing designation | Defines the core dimensions: 100mm bore, 210mm OD, 85mm width. |
| M | Stainless Steel Cage | Indicates a cage manufactured from stainless steel, offering superior corrosion resistance and strength, which is beneficial for the bearing's longevity and limiting speed. |
| Open (Seal Type) | No integral seals or shields | Allows for high-speed operation and permits the use of complex, externally supplied lubrication systems for optimal performance in controlled environments. |
51420 M Bearing Structural Features & Performance Benefits
The performance of the 51420 M is a direct result of its robust construction. Its thrust-specific design features a housing washer and shaft washer, optimized to handle pure axial loads with maximum efficiency. The use of a stainless steel cage ensures dimensional stability and reduced friction at high speeds, contributing directly to its limiting speed of 1,400 rpm. The 52100 Chrome Steel construction provides a hard, wear-resistant contact surface for the balls, significantly enhancing the bearing's fatigue life under high axial dynamic and static load ratings. The open design is critical for applications where heat dissipation is a priority, preventing thermal buildup during continuous high-load operation.
51420 M Bearing Typical Application Areas
The 51420 M thrust ball bearing is specified for heavy-duty machinery and systems where substantial axial forces are present. Its high load capacity and robust construction make it suitable for:
- Heavy-Duty Industrial Gearboxes
- Vertical Pumps and Compressors
- Cranes and Hoisting Equipment
- Machine Tool Tables and positioning systems
- Marine Propulsion Systems
