B500 / MB500

Overview of B500 / MB500 Series Torque Tube Bearings

The B500 / MB500 Series consists of single-row, extra light-duty ball bearings optimized for torque tube and low-load pivot applications in aircraft control systems. Despite their compact footprint, they deliver dependable rotational performance in demanding aerospace environments.

Key Features and Technical Highlights

• Material Quality: Manufactured from premium-grade AISI 52100 chrome steel, ensuring excellent fatigue resistance, hardness, and long service life under aviation-grade performance requirements.
• Temperature Range: Operates reliably within extreme conditions, from -65°F to +250°F (-54°C to +121°C), suitable for high-altitude and varying climate conditions.
• Sealed Design: Equipped with nonremovable PTFE seals that protect the bearing internals from contaminants, reducing wear and maintenance needs.
• Lubrication: Pre-lubricated with MIL-PRF-81322 grease at 80% fill unless otherwise specified, ensuring smooth motion, corrosion resistance, and longevity.
• Corrosion Protection: Cadmium plating is applied to external surfaces (except bore) per AMS-QQ-P-416 standards. All dimensions are post-plating to ensure accurate fit and interchangeability.

Compatibility and Interchangeability

The B500DD / MB500DD variants are dimensionally interchangeable with the standard B500 / MB500 Series. Bore, outer diameter, and width remain identical, allowing seamless replacement or specification substitution without system modification.

Customization Options

To meet specialized engineering requirements, these bearings can be customized in the following aspects:

• Custom diameters or geometry adjustments
• Alternate bearing materials (e.g., stainless steel, ceramic)
• Modified radial internal clearance or precision grades
• Alternative grease or dry film lubricants
• Special surface treatments or coating systems

Dimensions and Engineering Standards

• All dimensional specifications are stated in inches, unless otherwise noted.
• Post-plating measurements apply to ensure true tolerance compliance.

Recommended Applications

Typical use cases for the B500 / MB500 Series include:

• Torque tube assemblies in fixed-wing aircraft
• Control linkage joints requiring low load capacity
• Light-duty rotary interfaces in aerospace structures

Why Choose the B500 / MB500 Series?

If your application demands lightweight construction, high rotational accuracy, and dependable performance under moderate loads, the B500 / MB500 Series is a proven and cost-effective solution. Trusted by aerospace OEMs and maintenance providers worldwide.