DPP-W

Overview of DPP-W Series Airframe Control Bearings

The DPP-W Series represents a category of double-row, rigid-type ball bearings developed for aerospace applications requiring tight structural stability and excellent radial and axial load distribution. These bearings are widely used in primary and secondary flight control systems, where consistent performance under high-frequency motion is essential.

Key Features and Specifications

• Premium Bearing Steel: Rings and balls are crafted from high-quality AISI 52100 chrome steel, offering exceptional hardness, wear resistance, and fatigue strength.
• Wide Operating Temperature Range: Designed to function effectively between -65°F and +250°F (-54°C to +121°C), making them suitable for most aerospace environments.
• PTFE Sealing: Each bearing includes nonremovable PTFE seals to protect internal components from moisture, debris, and other contaminants.
• Factory Lubrication: Lubricated with MIL-PRF-81322 grease to ensure reliable performance; 80% fill is standard unless otherwise specified.
• Converging Contact Angles: The convergent “/” contact angle design enhances rigidity and allows for efficient handling of combined loads.
• Corrosion-Resistant Coating: All external surfaces—except the bore—are cadmium plated in accordance with AMS-QQ-P-416, with final dimensions measured after plating.

Customization and Engineering Support

The DPP-W Series is fully customizable to meet specific engineering requirements. Available options include:

• Non-standard sizes and profiles
• Alternate materials for rings, cages, or balls
• Specialized internal clearances and tolerances
• Custom lubrication strategies or seal types
• Alternative surface coatings such as zinc-nickel or dry film lubricants

Dimensional Guidelines

• Unless otherwise noted, all measurements are in inches.
• All dimensional specifications reflect final values after cadmium plating.

Typical Applications

The DPP-W Series is ideally suited for use in:

• Flight control actuator pivots
• Landing gear retraction mechanisms
• Rotor system linkages in helicopters
• High-rigidity mounting points in military and commercial aircraft

Conclusion

With its rigid double-row design, converging contact angles, and aerospace-grade materials, the DPP-W Series Airframe Control Ball Bearings are a robust solution for critical flight control assemblies. Their combination of strength, sealing performance, and corrosion resistance makes them a preferred choice for aerospace OEMs and maintenance teams alike.