Nachi spherical roller thrust bearings 29415EX 75x160x51mm
The NACHI 29415EX is a high-performance single-direction spherical roller thrust bearing from the 29400 series, designed and manufactured by NACHI-Fujikoshi Corporation—Japan's renowned precision engineering company . This open-type bearing (no seals) delivers exceptional load-carrying capacity and reliable operation in demanding industrial environments, featuring an extra capacity (EX) design optimized for heavy axial loads .
The NACHI 29415EX is a high-performance single-direction spherical roller thrust bearing from the 29400 series, designed and manufactured by NACHI-Fujikoshi Corporation—Japan's renowned precision engineering company . This open-type bearing (no seals) delivers exceptional load-carrying capacity and reliable operation in demanding industrial environments, featuring an extra capacity (EX) design optimized for heavy axial loads .
Core Specifications
| Parameter | Value |
|---|---|
| Dimensions | 75 mm (inner diameter) × 160 mm (outer diameter) × 51 mm (width) |
| Weight | 4.7 kg |
| Load Ratings | Dynamic: 525,000 N; Static: 1,470,000 N |
| Maximum Speed | Grease lubrication: 1,600 rpm; Oil lubrication: 2,300 rpm |
| Temperature Range | -30°C to +200°C |
| Cage Material | Steel |
| Tolerance Class | P0/PN2 (ABEC 1) |
| Direction | Single thrust direction |
Key Features & Technical Advantages
- Exceptional Load-Carrying Capacity: The EX design incorporates large-diameter asymmetrical rollers for world-class load handling capabilities, making it ideal for heavy machinery applications requiring high axial load support.
- Self-Aligning Performance: Spherical rollers and raceways automatically compensate for shaft deflections, alignment errors, and housing deformations, ensuring smooth operation even with slight misalignment between shaft and housing rings .
- Enhanced Precision & Durability:
- Improved roller roundness and raceway accuracy minimize friction and wear
- High-cleanliness steel construction extends service life
- Optimized raceway curvature reduces stress concentration
- Reduced noise and vibration for quieter operation
- Easy Maintenance: Separable components (shaft washer, housing washer, and roller-cage assembly) enable straightforward mounting, dismounting, and inspection without specialized tools .
Application Areas
The NACHI 29415EX excels in heavy-duty industrial applications including:
- Heavy machinery and equipment
- Mining and construction machinery
- Oil and gas drilling installations
- Marine gearboxes and propulsion systems
- Vertical motors and generators
- Presses and rolling mills
- Large industrial pumps and compressors
Operational Guidelines
- Lubrication: Oil lubrication is recommended for optimal performance in high-speed or high-temperature conditions; grease lubrication suitable for moderate speeds
- Radial Load Limitation: Can accommodate moderate radial loads (up to 55% of axial load)
- Mounting: Typically paired with spherical roller bearings to maximize axial load capacity in complex systems
