D-

Product Overview: D- Series Airframe Control Ball Bearings

The D- Series is a specialized range of track roller ball bearings developed for airframe control systems that require stable performance under high loads and frequent oscillation. Featuring a double-row design and converging contact angles, these bearings provide enhanced radial and axial load handling while maintaining structural integrity in compact aerospace assemblies.

Key Technical Specifications

• High-Quality Steel: Manufactured from premium AISI 52100 chrome steel, ensuring superior fatigue resistance, surface hardness, and dimensional precision.
• Wide Temperature Tolerance: Operational range spans from -65°F to +250°F (-54°C to +121°C), suitable for various aerospace climates and altitude conditions.
• Durable Sealing: Equipped with nonremovable PTFE seals to guard against contaminants, minimizing maintenance intervals and maximizing bearing service life.
• Reliable Lubrication: Factory-lubricated with MIL-PRF-81322 specification grease, with a minimum 80% fill rate unless otherwise requested.
• Optimized Contact Angles: Converging contact angles (“/” configuration) enable balanced radial and axial load capacity for track-following applications.
• Protective Coating: All external surfaces, except for the bore, are cadmium plated in accordance with AMS-QQ-P-416, enhancing corrosion resistance without compromising tolerance.

Customization Options

The D- Series can be tailored for specific aircraft programs and control system configurations. Custom options include:

• Non-standard dimensions and geometries
• Alternative materials or corrosion-resistant coatings
• Special radial internal clearances and bearing tolerances
• Modified lubrication protocols and seal configurations

Dimensional Standards

• Unless otherwise specified, all measurements are listed in inches.
• All stated dimensions apply after cadmium plating is completed.

Applications

The D- Series bearings are suitable for high-load and track-guided motion in:

• Aircraft flight control linkages
• Track follower systems
• Structural pivot points in wings and fuselage
• Rotary-to-linear motion transfer mechanisms

Conclusion

With its robust design, self-contained sealing, and superior material selection, the D- Series Airframe Control Ball Bearings are a dependable solution for aerospace engineers seeking durability and alignment stability in control surface systems and structural assemblies. The customizable nature of the series makes it adaptable to both OEM and MRO aerospace programs.