B5500WZZ

Overview of B5500WZZ Series Torque Tube Bearings

The B5500WZZ Series bearings are double-row ball bearings developed for aerospace torque tube assemblies and other critical rotational interfaces in control systems. With a compact design and enhanced load distribution, this series provides exceptional performance under axial and radial loads while maintaining dimensional stability in dynamic operating conditions.

Key Features and Specifications

• Premium Bearing Steel: Constructed with AISI 52100 high-carbon chromium steel for superior hardness, wear resistance, and fatigue life.
• Wide Operating Temperature Range: Designed to function reliably from -65°F to +250°F (-54°C to +121°C), ideal for both high-altitude and ground-based aircraft operations.
• Sealed Protection: Each bearing is fitted with nonremovable PTFE (Polytetrafluoroethylene) seals to safeguard internal components against contamination and moisture.
• Advanced Lubrication: Pre-filled with MIL-PRF-81322 specification grease, ensuring high-load performance and resistance to corrosion and oxidation. Standard fill level is 80% unless otherwise requested.
• Optimized Load Geometry: Features convergent contact angles (“/”) to efficiently manage combined axial and radial forces in torque tube installations.
• Cadmium-Plated Exterior: External surfaces, excluding the bore, are treated with cadmium plating per AMS-QQ-P-416, enhancing corrosion resistance and ensuring dimensional consistency after plating.

Customization and Engineering Flexibility

To meet specific engineering and operational requirements, the B5500WZZ Series offers a wide range of custom options:

• Non-standard bore or outer diameter configurations
• Alternative materials such as stainless steel or ceramic rolling elements
• Tailored radial internal clearances and tolerance grades
• Specialized lubricants for extreme environments (e.g., high-altitude, vacuum, cryogenic)
• Alternative plating and surface treatments upon request

Dimensional and Compliance Standards

• All dimensions are specified in inches unless noted otherwise.
• Final bearing dimensions apply after cadmium plating is applied.

Primary Applications

These bearings are specifically suited for:

• Torque tube pivot assemblies in aircraft control systems
• Flight surface linkage and control arms
• Rotational points in structural aircraft subassemblies
• Other high-load aerospace and defense applications

Why Choose B5500WZZ Series Bearings?

Designed with both reliability and performance in mind, the B5500WZZ Series delivers consistent torque response, reduced maintenance, and long operational life. Aerospace OEMs and MRO providers rely on this series for its proven track record in safety-critical applications.