KP / MKP Series

Overview of KP- / MKP- Series Airframe Control Ball Bearings

The KP- / MKP- Series are high-precision, heavy-duty ball bearings engineered for demanding aerospace control systems. With single-row construction and removable seals, these bearings offer a reliable balance of strength, ease of maintenance, and environmental resistance, making them suitable for primary flight controls, landing gear assemblies, and similar applications.

Key Features

Material: Rings and balls are crafted from high-quality AISI 52100 chrome steel, ensuring excellent hardness and wear resistance.
Design: Heavy-duty single-row configuration for high load support and precision alignment.
Seals: Equipped with removable PTFE (Polytetrafluoroethylene) seals to protect against contaminants while allowing access for maintenance or re-lubrication.
Operating Temperature: Capable of functioning reliably between -65 °F and +250 °F (-54 °C to +121 °C).
Lubrication: Pre-lubricated with MIL-PRF-81322 aerospace-grade synthetic grease at 80% fill, ensuring optimal performance under severe conditions.
Corrosion Protection: External surfaces, excluding the bore, are cadmium plated per AMS-QQ-P-416, providing superior protection in high-moisture or corrosive environments. All dimensions are measured post-plating.

Applications

These bearings are widely used in:

Aircraft control linkages
Landing gear pivot points
Flap and slat actuation systems
Rotational joints in aerospace mechanical assemblies

Customization Options

To support diverse aerospace engineering requirements, the following options are available upon request:

Special sizes and load ratings
Alternative materials, including stainless steel or ceramic hybrids
Custom radial internal clearances and tolerances
Lubrication alternatives for extreme temperature or cleanroom environments
Environmentally compliant plating such as zinc-nickel (RoHS-compliant)

Technical Standards

Unless otherwise stated, all bearing dimensions are provided in inches and reflect the finished size after cadmium plating. Engineering drawings, CAD models, and part-specific datasheets are available to facilitate accurate specification and integration.

Contact us for application-specific recommendations, engineering consultation, or bulk order pricing.